Mark Hyman, MD · 2025-07-02 · Mark Hyman (host), Daniel Schmachtenberger

Why Chronic Disease Is Exploding! | Daniel Schmachtenberger

46 research-tied claims examined: 5 contradicted 8 overstated 6 context 18 supported 9 unverified

5

Contradicted by research

0:10:05Mark Hyman (host)contradictedhigh

Ninety percent of measles was already gone when the vaccine was introduced, due to better sanitation and health.

"90% of measles was gone when they introduced the vaccine because of better sanitation and health." (said at 0:10:05)

The claim confuses measles mortality with measles incidence (case numbers). Prior to the introduction of the measles vaccine in 1963, measles incidence remained nearly universal, infecting an estimated 3 to 4 million people annually in the United States alone (with approximately 500,000 reported cases per year). Measles was not '90% gone' prior to the vaccine; case incidence only collapsed (by >98% to 99%) following the widespread rollout of the measles vaccine. Furthermore, because measles is a highly contagious airborne respiratory virus, general improvements in municipal sanitation and hygiene had no substantial impact on measles transmission rates, although improved medical care, supportive treatment, and antibiotics for secondary infections had reduced the case fatality rate.

0:16:59Daniel Schmachtenbergercontradictedhigh

Napalm is in the same molecular class as dioxin.

"To think about this thing that we invented as a chemical weapon to destroy nature at scale, napalm, which is dioxin, same molecular class." (said at 0:16:59)

Napalm is not dioxin, nor is it in the same molecular class. Napalm is an incendiary mixture composed of a gelling agent (historically aluminum salts of naphthenic and palmitic acids, and later polystyrene and benzene) mixed with gasoline or petroleum fuels, functioning as a thermal weapon. Dioxins (specifically polychlorinated dibenzo-p-dioxins such as 2,3,7,8-tetrachlorodibenzodioxin or TCDD) are heterocyclic organochlorine compounds that occurred as toxic contaminants in tactical defoliants such as Agent Orange (composed of 2,4,5-T and 2,4-D). Napalm and dioxin are chemically, structurally, and functionally distinct substances.

0:26:51Mark Hyman (host)contradictedmoderate

Approximately 39% of the population of adults and children has a blood lead level greater than 2.

"American Journal of Cardiology found that if your lead level was over two, two out of, you know, 10, which is 39% of the population of adults and kids, it was a bigger risk factor for stroke and heart attack than having abnormal cholesterol." (said at 0:26:51)

The claim appears to conflate the population attributable fraction (PAF) of cardiovascular mortality with the proportion of the population having elevated blood lead levels. In a landmark NHANES cohort study on low-level lead exposure and cardiovascular mortality (Lanphear et al., The Lancet Public Health 2018), researchers estimated that environmental lead exposure accounted for a population attributable fraction of 37.4% (approx. 38–39%) of ischaemic heart disease mortality in US adults, not that 39% of modern adults and children have blood lead levels above 2 μg/dL. Furthermore, modern biomonitoring data show that median blood lead levels in the contemporary US population have dropped well below 1.0 μg/dL due to phase-outs of leaded gasoline and paint.

0:30:26Mark Hyman (host)contradictedmoderate

A cohort study of the children of California farm workers exposed to large amounts of pesticides found a loss of 41 million IQ points from pesticide exposure.

"they looked at the children of farm workers in California who were exposed to large amounts of pesticides and herbicides. That cohort of kids that they studied lost 41 million IQ points just from exposure to pesticides." (said at 0:30:26)

The speaker conflates findings from a local cohort study (the CHAMACOS study of agricultural families in the Salinas Valley, California) with a nationwide population-level risk modeling estimate. In the California cohort studies, prenatal organophosphate pesticide exposure was associated with an average loss of approximately 5 to 7 Full-Scale IQ points per child in high-exposure groups, across a cohort of a few hundred children. The figure of tens of millions of IQ points (such as estimated by Bellinger, 2012, and subsequent population modeling studies) represents the modeled cumulative loss across the entire population of millions of children in the United States, not the California farm-worker cohort itself.

0:38:12Daniel Schmachtenbergercontradictedmoderate

When combining properly prescribed medications, medical errors, adverse drug interactions, surgeries, and hospital-acquired infections, iatrogenesis is the number one cause of death in the United States.

"If you take iatrogenesis to mean diseases that come from interaction with the healthcare system at large... prescriptions that are rightly given, prescriptions that are wrongly given, allergic reactions to meds and drug interactions and whatever, surgeries, infections you get while in the hospital, etc. If you add those up, many people add those up and it's the number one cause of death of Americans in the country." (said at 0:38:12)

Even under broad definitions that aggregate medical errors, hospital-acquired infections, surgical complications, and adverse drug reactions, published estimates in medical literature place iatrogenic mortality as the third leading cause of death in the United States, behind heart disease and cancer, not the number one cause. A widely cited 1998 meta-analysis of US hospital data estimated that fatal adverse drug reactions caused approximately 106,000 deaths annually, ranking them between the fourth and sixth leading cause of death. Subsequent analyses combining medical errors and systemic adverse events have estimated total annual deaths at approximately 225,000 to 251,000, placing medical errors behind heart disease (approx. 600,000–700,000 annual deaths) and cancer (approx. 600,000 annual deaths).

8

Overstated

0:27:35Mark Hyman (host)overstatedmoderate

The NIH funded a $30 million trial called TACT evaluating IV EDTA chelation, which found it to be effective in preventing heart disease and heart attacks.

"And the NIH did a $30 million trial called the TACT trial where they used EDTA IV chelation. EDTA specifically removes lead, and they found that it was very actually effective in preventing heart disease and heart attacks, and yet it's not part of standard medicine." (said at 0:27:35)

The NIH-funded Trial to Assess Chelation Therapy (TACT) evaluated intravenous disodium EDTA chelation in post-myocardial infarction (MI) patients. However, characterizing the trial as showing EDTA chelation was "very effective in preventing heart disease and heart attacks" overstates the published evidence. In the initial TACT trial (2013), EDTA chelation resulted in only a modest reduction in a broad composite primary end point (hazard ratio 0.82; 95% CI, 0.69-0.99; P = .035), driven mainly by reductions in coronary revascularization procedures, while individual rates of myocardial infarction, stroke, and total mortality were not significantly reduced. The authors concluded the results were insufficient to support routine clinical use. Subsequently, the follow-up TACT2 trial (2024), conducted specifically in post-MI patients with diabetes, found that despite reducing blood lead levels, EDTA chelation produced no significant reduction in primary cardiovascular events (HR 0.93; 95% CI, 0.76-1.16; P = .53) or all-cause mortality compared to placebo.

0:37:55Daniel Schmachtenbergeroverstatedmoderate

Correctly prescribed drugs administered at the proper dose and for the correct indication are the third leading cause of death in the United States.

"we know that our healthcare system itself is the third leading cause of death through prescribed drugs given for the right reason at the right dose for the right patient, not mistakes." (said at 0:37:55)

The speaker overstates the specific contribution of properly prescribed drugs. The landmark meta-analysis on properly prescribed and administered drugs (excluding errors, overdose, and noncompliance) in US hospitals estimated approximately 106,000 fatal adverse drug reactions per year, placing them between the fourth and sixth leading cause of death in the United States (Lazarou et al., 1998). The claim that medical harm is the third leading cause of death comes from analyses examining medical errors broadly—which include administrative, diagnostic, and clinical mistakes—rather than non-error, properly prescribed drug therapy alone.

0:42:48Mark Hyman (host)overstatedmoderate

Chronic loneliness confers a health risk equivalent to smoking two packs of cigarettes per day.

"if you're lonely, it's like smoking two packs of cigarettes a day in terms of your risk." (said at 0:42:48)

The speaker overstates the magnitude of the mortality risk associated with loneliness. The widely cited benchmarking from meta-analytic literature (notably by Holt-Lunstad and colleagues) compared the risk of poor social relationships to smoking up to 15 cigarettes per day (less than one pack), not two packs (40 cigarettes) per day. Furthermore, meta-analyses focusing specifically on subjective loneliness found an odds ratio of 1.26 (a 26% increase in mortality risk), which is considerably lower than the mortality risk associated with heavy smoking (two packs per day).

1:02:02Mark Hyman (host)overstatedmoderate

Having type 2 diabetes makes a person's risk of developing dementia four times higher.

"For example, your risk of dementia is four times higher if you have type 2 diabetes." (said at 1:02:02)

Type 2 diabetes is a well-established risk factor for cognitive decline and dementia, but the magnitude of risk increase is substantially smaller than claimed. Systematic reviews and meta-analyses of prospective cohort studies show that individuals with diabetes have approximately a 1.4- to 1.7-fold higher risk (a 40% to 73% relative increase) of developing all-cause dementia compared to those without diabetes (with relative risks around 1.39 for Alzheimer's disease and 2.38 for vascular dementia), well below the claimed fourfold (400%) increase.

1:02:10Mark Hyman (host)overstatedmoderate

Insulin resistance is an underlying driver of common cancers, including breast, pancreatic, ovarian, and colon cancer.

"Your risk of cancer is—many of the most common cancers: breast, pancreatic, ovarian cancer, colon cancer, pancreatic cancer. These are diseases of insulin resistance." (said at 1:02:10)

Epidemiological cohorts and meta-analyses demonstrate that insulin resistance and associated hyperinsulinemia are significant risk factors and potential tumor promoters for several malignancies, particularly pancreatic, colorectal, and postmenopausal breast cancers (typically associated with relative risks between 1.1 and 2.5). However, describing these cancers categorically as "diseases of insulin resistance" overstates the relationship. Cancer is a multifactorial disease driven primarily by somatic genetic and epigenetic alterations, and for certain cancers mentioned (such as ovarian cancer), large cohort studies demonstrate little to no direct mediating effect of insulin resistance.

1:02:40Mark Hyman (host)overstatedlow

Clinical studies using ketogenic diets in stage 4 pancreatic cancer patients have demonstrated cancer remissions.

"They're doing, you know, studies of stage 4 pancreatic cancer using ketogenic diets and seeing remissions in some of these patients, which is almost like heresy in medicine." (said at 1:02:40)

Clinical studies investigating ketogenic diets alongside standard chemotherapy in metastatic (stage 4) pancreatic ductal adenocarcinoma have shown feasibility, safety, and preliminary signals toward improved progression-free survival (PFS) or stable disease, but have not demonstrated cancer remissions (cures or complete tumor eradication). In a randomized phase II screening trial of 32 patients with metastatic pancreatic cancer receiving chemotherapy (gemcitabine, nab-paclitaxel, cisplatin) with or without a medically supervised ketogenic diet (MSKD), median PFS was 8.5 months with MSKD versus 6.2 months without MSKD (HR 0.53, p = .096), and overall survival was 13.7 versus 10.2 months (HR 0.58, p = .107), representing disease stabilization and modest survival trends rather than remissions. Describing these early-phase findings as "seeing remissions in some of these patients" overstates the clinical outcomes observed.

1:03:30Mark Hyman (host)overstatedhigh

The International Classification of Diseases, 10th Revision (ICD-10) contains 155,000 disease categories.

"For example, the diagnostic manual for diseases is called ICD-10, the International Classification of Diseases, Volume 10 or Version 10, and there's 155,000 diseases." (said at 1:03:30)

The claim overstates the number of disease categories in ICD-10. The core International Classification of Diseases, 10th Revision (ICD-10) published by WHO contains roughly 14,000 diagnostic categories. Even the expanded U.S. clinical modification for diagnosis codes (ICD-10-CM) contains approximately 68,000 to 80,000 diagnosis codes. The figure of ~155,000 represents the total number of codes when combining both ICD-10-CM diagnosis codes and ICD-10-PCS inpatient medical/surgical procedure codes, conflating medical procedures with distinct disease categories.

1:09:03Mark Hyman (host)overstatedlow

Glyphosate exposure causes lymphoma.

"Monsanto which makes glyphosate, which causes lymphoma, and then they make the drugs to treat the lymphoma." (said at 1:09:03)

The host claims that glyphosate "causes lymphoma." Systematic reviews and meta-analyses of observational epidemiological studies have found an association between heavy exposure to glyphosate-based herbicides and an increased risk of Non-Hodgkin lymphoma (meta-relative risks ranging from 1.30 to 1.41). However, stating definitively that glyphosate causes lymphoma overstates the scientific evidence, as observational studies show statistical associations rather than established direct causation, and findings across major cohorts and systematic reviews remain debated due to potential confounding, recall bias, and unmeasured pesticide co-exposures.

6

Needs context

0:11:28Daniel Schmachtenbergerneeds contextmoderate

Approximately 2 billion tons of municipal waste and 190 billion tons of mining waste are produced globally each year.

"There's two billion tons of municipal waste produced every year, waste that, you know, like comes from our house. It's a lot. Two billion tons. Like mind-blowing when you think about it. There's about 190 billion tons of mining waste produced every year." (said at 0:11:28)

The claim pairs an accurate estimate of municipal solid waste with an unusually high estimate of mining waste. Global assessments typically estimate annual municipal solid waste generation at approximately 2.0 to 2.7 billion metric tonnes (for example, the World Bank reported 2.01 billion tonnes in 2016, and recent modeling estimates 2.3 to 3.1 billion tonnes). However, annual global mining waste is generally estimated to be far lower than 190 billion tonnes, with total global waste generation across all economic activities estimated at approximately 20 billion tonnes per year, though broader definitions counting total earth and overburden displacement can yield larger material movement figures.

0:13:49Daniel Schmachtenbergerneeds contexthigh

Oxygen, carbon, hydrogen, nitrogen, phosphorus, and calcium account for 96% of human body weight, and with electrolytes they make up 99%.

"Oxygen, carbon, hydrogen, nitrogen, phosphorus, calcium make up 96% of our weight. And you add the few electrolytes in there and it's 99% of our weight." (said at 0:13:49)

Standard human body composition reference models (such as the atomic-level model of body composition and International Commission on Radiological Protection reference data) establish that the four primary elements—oxygen (~65%), carbon (~18.5%), hydrogen (~9.5%), and nitrogen (~3.2%)—account for approximately 96% of total body mass. When calcium (~1.5%), phosphorus (~1.0%), and essential electrolytes (potassium, sodium, chlorine, and magnesium, along with sulfur) are included, they collectively constitute over 99% of total human body weight, leaving trace elements to account for less than 1%. The speaker's statement groups calcium and phosphorus into the 96% figure rather than the four primary elements alone, but accurately reflects the overall distribution of major elements and electrolytes in the human body.

0:33:43Daniel Schmachtenbergerneeds contextvery low

A clinical study by Dr. Heather Sandison using a multimodal protocol improved or reversed Montreal Cognitive Assessment (MoCA) scores in 70% of participants within six months.

"Dr. Heather Sandison, who wrote the book recently, Reversing Alzheimer's... And that particular study that she did, there was an inpatient using a Bredesen-like protocol that was reversing the MoCA scores in 70% of the people that went in within six months with pretty basic stuff, like largely diet, lifestyle, and a little bit of functional medicine." (said at 0:33:43)

A 2023 pilot clinical trial led by Dr. Heather Sandison (PMID: 37355891) evaluated a multimodal, individualized intervention combining diet, exercise, stress management, nutraceuticals, and targeted medical therapies over six months in 34 individuals with objective cognitive impairment. The study reported that mean MoCA scores improved significantly from 19.6 ± 3.1 at baseline to 21.7 ± 6.2 at 6 months (p = 0.013), with improvements in cognitive domains observed across a majority of participants. However, this study was a small, uncontrolled, single-arm feasibility trial without a control or sham group, meaning practice effects, regression to the mean, and confounding cannot be excluded. Additionally, the clinical trial was delivered as an outpatient protocol with pragmatic clinic visits and weekly phone support, rather than as an inpatient intervention.

0:37:51Mark Hyman (host)needs contextmoderate

81% of Americans take at least one prescription medication.

"You know, 81% of Americans are on at least one medication." (said at 0:37:51)

The 81% figure comes from the landmark Slone Survey (Kaufman et al., JAMA 2002), which found that 81% of ambulatory US adults took at least one medication or supplement in any given week. However, that broad definition included prescription drugs, over-the-counter (OTC) medications, vitamins/minerals, and herbal supplements. When restricted strictly to prescription drugs, 50% of adults reported taking at least one prescription medication in the preceding week.

0:50:50Daniel Schmachtenbergerneeds contextmoderate

Autism prevalence in children has increased from 1 in 10,000 to approximately 1 in 130 over recent decades.

"Like the autism epidemic as an example. We've went from 1 in 10,000 when I was born to, you know, 1 in 130." (said at 0:50:50)

Historical epidemiological surveys from prior to the mid-1980s frequently reported classic autism rates around 1 to 4 per 10,000 children (roughly 1 in 2,500 to 1 in 10,000), whereas modern surveillance and global reviews estimate autism spectrum disorder prevalence between 1 in 100 (100 per 10,000) and 1 in 36 depending on the surveillance cohort and year. However, epidemiological consensus emphasizes that this rise reflects broadened diagnostic criteria (transitioning from narrowly defined classic infantile autism to the broader autism spectrum), increased awareness, diagnostic substitution, and improved screening and case ascertainment, rather than a demonstrated biological epidemic.

0:37:06Mark Hyman (host)needs contexthigh

The United States spends twice as much per capita on healthcare as any other nation, and three to five times as much as many countries.

"We're spending more and more—I mean, we spend twice that of any other nation, often three, four, five times as much." (said at 0:37:06)

Cross-national comparisons of health expenditures confirm that the United States spends roughly double the average of other high-income and OECD countries on healthcare per capita, and three to five times (or more) as much as many other nations. However, stating that the U.S. spends 'twice that of any other nation' is technically imprecise: while the U.S. is the highest spender globally, the next highest-spending countries (such as Switzerland, Germany, Norway, or Luxembourg) spend within 20% to 40% of U.S. levels, rather than half.

18

Supported by research

0:20:05Mark Hyman (host)supportedhigh

DMSA is an FDA-approved drug for chelation that binds heavy metals for urinary excretion.

"And so we give a drug called DMSA, which is an FDA-approved drug for chelation. That's a Greek word that means to claw, to bind something. So it binds the metals and then we collect the urine" (said at 0:20:05)

DMSA (meso-2,3-dimercaptosuccinic acid, generic name succimer) is an FDA-approved oral chelating agent indicated for the treatment of lead poisoning in pediatric patients. It acts by binding lead and other heavy metal ions to form water-soluble complexes that are excreted in the urine.

0:22:21Daniel Schmachtenbergersupportedmoderate

Historical exposure to leaded gasoline resulted in an estimated loss of one billion IQ points in the United States population.

"The effects when you look back in just America are estimated at a billion points of IQ loss for Americans." (said at 0:22:21)

A 2022 epidemiological modeling study by McFarland et al. published in PNAS estimated that childhood lead exposure from leaded gasoline resulted in a cumulative loss of 824,097,690 IQ points among the US population alive in 2015 (an average loss of 2.6 IQ points per person). Rounding 824 million to approximately one billion points accurately reflects the magnitude reported in the primary published estimate.

0:25:51Daniel Schmachtenbergersupportedmoderate

A 2019 study showed that lead exposure caused children under five globally to lose 780 million IQ points in that single year.

"there's a study I saw in 2019 that showed children under five lost 780 million IQ points just in 2019 just from lead." (said at 0:25:51)

A global modelling study published in The Lancet Planetary Health (using Global Burden of Disease 2019 data) estimated that lead exposure caused children younger than 5 years to lose 765 million IQ points (95% CI 443–1,098 million) globally in the year 2019. The speaker's figure of 780 million IQ points lost in 2019 closely aligns with this published estimate.

0:21:55Daniel Schmachtenbergersupportedmoderate

Early toxicity studies on tetraethyllead showed that workers and researchers became ill, but the results were concealed.

"The early studies that were done on tetraethyllead on toxicity, the people did get sick, including the researcher, and the results were hidden." (said at 0:21:55)

Historical analyses and occupational health literature confirm that the early development and production of tetraethyl lead (TEL) in the 1920s caused severe illness in workers and researchers, including primary inventor Thomas Midgley Jr., while industry proponents actively marginalized, suppressed, and downplayed public health warnings and toxicity data to advance commercialization.

0:25:29Daniel Schmachtenbergersupportedhigh

Leaded gasoline remains in use for propeller-driven aircraft.

"Even though we supposedly banned lead in gasoline, it's still used in prop planes." (said at 0:25:29)

While tetraethyllead was phased out and banned in motor vehicle gasoline under the Clean Air Act, leaded aviation gasoline (avgas, most commonly 100LL) remains in widespread use for piston-engine, propeller-driven aircraft. Avgas is currently the leading source of airborne lead emissions in the United States.

0:30:45Mark Hyman (host)supportedhigh

There are approximately 350,000 chemicals in regular, regulated industrial use and 280 million chemicals recorded in the American Chemical Society database.

"there's 350,000 chemicals that are in regular industrial use that are regulated, something like that. There's 280 million chemicals in the database of the American Chemical Society." (said at 0:30:45)

The speaker's figures accurately reflect published registry and chemical inventory data. A landmark 2020 global inventory analysis (Wang et al., Environmental Science & Technology) identified approximately 350,000 chemical substances and mixtures that have been registered for production and industrial/commercial use across national and regional regulatory inventories. In addition, the Chemical Abstracts Service (CAS) Registry, curated by a division of the American Chemical Society (ACS), maintains the world's largest database of unique chemical substances, which surpassed 250 million to over 280 million registered organic and inorganic chemical substances in recent years.

0:37:15Mark Hyman (host)supportedhigh

The United States ranks 48th globally in life expectancy.

"We're 48th in life expectancy and going down. A lot of our statistics are worse than most other countries." (said at 0:37:15)

The speaker's statement that the United States ranks around 48th globally in life expectancy and has been declining in international rankings is supported by global demographic and epidemiological data. According to the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD 2021) evaluating 204 countries and territories, the United States experienced a sustained decline in relative global life expectancy rankings: dropping from 35th in 1990 to 46th in 2021 for males, and from 19th in 1990 to 47th in 2021 for females (with healthy life expectancy dropping even further to 69th for males and 76th for females).

0:37:22Mark Hyman (host)supportedhigh

The United States has an annual healthcare expenditure of approximately 5 trillion dollars.

"It's getting worse, and that's crazy with a $5 trillion a year healthcare budget." (said at 0:37:22)

Official National Health Expenditure (NHE) data show that United States healthcare spending reached $4.5 trillion in 2022 and has continued to grow at an annual rate of over 4% to 5%, placing current annual national health expenditures at approximately $4.8 to $5 trillion.

0:37:28Mark Hyman (host)supportedhigh

The United States ranks approximately 30th among top developed nations in infant mortality.

"we're I think 30th among the top developed nations in healthcare metrics like infant mortality" (said at 0:37:28)

The host's statement that the United States ranks approximately 30th among top developed nations in infant mortality is supported by official international comparative statistics and published analyses. According to data from the Centers for Disease Control and Prevention (CDC) National Center for Health Statistics (NCHS) analyzing Organisation for Economic Co-operation and Development (OECD) countries, the United States ranked 26th in infant mortality among OECD countries in 2010 with an infant mortality rate of 6.1 deaths per 1,000 live births (MacDorman et al., 2014). Comparative studies across OECD high-income countries consistently show the US ranking near the bottom among wealthy developed nations on infant mortality, life expectancy, and other overall health outcomes, with the US having the highest infant mortality rate (5.8 per 1,000) among 11 top high-income nations examined in 2016 (Papanicolas et al., 2018).

0:41:57Mark Hyman (host)supportedhigh

Ellagitannins found in pomegranates, walnuts, and berries are converted by gut microbiota into urolithin A, which promotes the recycling of old mitochondria through mitophagy.

"this compound that comes from pomegranates and walnuts and berries called ellagitannins that gets converted in the gut through the microbiome to a compound called urolithin A that helps recycle old mitochondria." (said at 0:41:57)

The speaker accurately describes the biological origin and primary mechanism of urolithin A. Ellagitannins are dietary polyphenols abundant in pomegranates, berries, and nuts (such as walnuts). Upon ingestion, ellagitannins and ellagic acid are metabolized by specific gut microbiota into urolithins, primarily urolithin A. Extensive in vitro, animal, and clinical research confirms that urolithin A functions as a potent inducer of mitophagy—the selective autophagy process that degrades and recycles dysfunctional or aged mitochondria.

0:46:35Mark Hyman (host)supportedhigh

Approximately 50% of the human population is infected with cytomegalovirus (CMV).

"Probably half the population has CMV. You know, it's a lot of people." (said at 0:46:35)

Representative epidemiological surveillance and systematic reviews confirm that at least half the population is infected with cytomegalovirus (CMV). Nationally representative data from the U.S. National Health and Nutrition Examination Survey (NHANES) demonstrated an overall age-adjusted CMV seroprevalence of 50.4% in individuals aged 6–49 years. Globally, CMV seroprevalence is even higher, with a systematic review and meta-analysis estimating an 83% global seroprevalence in the general population.

0:46:42Daniel Schmachtenbergersupportedlow

A study assessing biopsied prostate cancer tissue found that the combination of Epstein-Barr virus (EBV) and human papillomavirus (HPV) was present in the vast majority of cases.

"There was a study I found interesting that was looking at prostate cancers that were removed for cancer and that were biopsied and doing viral assessment on it, and found that the combination of EBV and HPV was present in the vast majority of them." (said at 0:46:42)

The speaker accurately describes the findings of a published study by Whitaker et al. (2013), which assessed human papillomavirus (HPV) and Epstein-Barr virus (EBV) in prostate cancer tissue and reported that gene sequences for both viruses were present in most of the malignant specimens. However, the study also found that EBV and HPV were equally ubiquitous in normal and benign prostate tissue, suggesting the dual viral presence may be incidental rather than a specific driver of prostate cancer. Subsequent studies in other cohorts have reported substantially lower coinfection rates (e.g., 14.9%).

0:47:37Mark Hyman (host)supportedlow

Rudy Tanzi's research demonstrated that microbes, viruses, and bacteria from the microbiome are present in brain biopsies of Alzheimer's patients, triggering amyloid plaque deposition as an immune response.

"look at Rudy Tanzi's work, who's an Alzheimer's researcher, and he talks about how when they do brain biopsies, they are finding all these bugs in the brain from the microbiome, from viruses, from other bacteria that may be causing an irritation that leads to the deposition of the amyloid plaque" (said at 0:47:37)

Rudolph Tanzi, Robert Moir, and colleagues developed the 'Antimicrobial Protection Hypothesis' of Alzheimer's disease. In cell culture, worm, and transgenic mouse models, their research demonstrated that amyloid-beta (Aβ) functions as an antimicrobial peptide in the brain's innate immune system. Exposure to viral (such as herpes simplex virus 1 and human herpesvirus 6) and bacterial pathogens seeded rapid Aβ oligomerization and plaque deposition, entrapping and neutralizing the microbes. While these findings are primarily derived from preclinical models and postmortem human brain tissue rather than routine clinical biopsies, the host accurately summarized Tanzi's research and proposed model.

0:53:00Mark Hyman (host)supportedmoderate

A blood homocysteine level above 14 micromoles per liter increases the risk of developing dementia by 50%.

"Their cutoff level is like, I think, 15 or 16 or something, and any level over 14, according to the literature, increases your risk of dementia by 50%. The optimal level should be 6 to 8." (said at 0:53:00)

The statement accurately reflects published landmark cohort data on plasma homocysteine and dementia risk. In the prospective Framingham Heart Study (Seshadri et al., 2002), a plasma total homocysteine concentration exceeding 14 µmol/L was identified as a critical threshold, where the risk of Alzheimer's disease nearly doubled, and each 1-standard-deviation increase in log-transformed homocysteine was associated with a 40% increase in all-cause dementia risk (relative risk 1.4, 95% CI 1.1–1.9) after adjusting for age, sex, APOE genotype, vitamin levels, and vascular risk factors.

  • supports: Plasma homocysteine as a risk factor for dementia and Alzheimer's disease. (The New England journal of medicine 2002) · cited 3239x in the literature
    "The multivariable-adjusted relative risk of dementia was 1.4 (95 percent confidence interval, 1.1 to 1.9) for each increase of 1 SD in the log-transformed homocysteine value either at base line or eight years earlier. The relative risk of Alzheimer's disease was 1.8 (95 percent confidence interval, 1.3 to 2.5) per increase of 1 SD at base line and 1.6 (95 percent confidence interval, 1.2 to 2.1) per increase of 1 SD eight years before base line. With a plasma homocysteine level greater than 14 micromol per liter, the risk of Alzheimer's disease nearly doubled." (abstract, results, passage verified)
    pubmedfull study (doi)
0:53:25Mark Hyman (host)supportedmoderate

Standard clinical laboratory reference ranges commonly report fasting insulin levels up to 16 or 18 as normal.

"Same thing with insulin. I think we we see insulin levels being reported as normal anything up to 16 or 18." (said at 0:53:25)

Standard clinical laboratory immunoassays and population-based reference interval studies frequently cite upper limits of normal for fasting serum insulin in the range of approximately 13 to 25 μIU/mL (e.g., 16.32 μIU/mL in healthy nondiabetic adults), aligning with the claim that laboratory reference ranges commonly report fasting insulin levels up to 16 to 18 μIU/mL as normal.

0:45:39Mark Hyman (host)supportedmoderate

Replicating SARS-CoV-2 virus persists in the bodies of individuals months or years after recovery from acute infection, contributing to long COVID.

"Or you know, even with COVID, we're now seeing replicating COVID viruses in people who've recovered months or years later in their bodies that are producing ongoing effects that lead to long COVID and persistent disease." (said at 0:45:39)

Evidence supports that persistent SARS-CoV-2 reservoirs (including viral RNA, viral antigens, and signs of ongoing viral replication) can remain in various tissues—such as the gastrointestinal tract, lymphoid tissue, and blood—for months following acute infection, and that viral persistence is significantly associated with long COVID (PASC). A large community surveillance study published in Nature (PMID 38383783) demonstrated persistent high-titre viral RNA infections exhibiting continuous amino acid substitutions characteristic of ongoing replication, with affected individuals having >50% higher odds of reporting long COVID. In addition, tissue biopsy and review studies confirm that SARS-CoV-2 antigens and RNA persist in tissue reservoirs for extended periods, driving localized immune dysregulation and chronic inflammatory symptoms.

0:47:33Mark Hyman (host)supportedmoderate

Herpesvirus infection is associated with an increased risk of developing Alzheimer's disease.

"And we talk about like the infections can cause a myriad of problems, like herpes can lead to increased risk for Alzheimer's, right?" (said at 0:47:33)

Multiple systematic reviews and meta-analyses of observational studies demonstrate that infection with herpesviruses—most notably herpes simplex virus type 1 (HSV-1) and human herpesvirus 6 (HHV-6)—is associated with a statistically significant increased risk of developing Alzheimer's disease. A 2025 meta-analysis encompassing over 1.2 million participants found that HSV infection was associated with a 20% increased risk of Alzheimer's disease in prospective cohort studies (HR = 1.20) and a 32% increased likelihood in case-control studies (OR = 1.32), with HSV-1 specifically associated with a 46% increase in odds (OR = 1.46).

0:48:40Mark Hyman (host)supportedhigh

Vitamin D deficiency increases the risk of developing multiple sclerosis.

"like vitamin D we know is increasing risk for MS because it's important in neurologic function and immune function." (said at 0:48:40)

Epidemiological studies, meta-analyses, and Mendelian randomization analyses consistently demonstrate that lower serum vitamin D levels and vitamin D deficiency increase the risk of developing multiple sclerosis (MS). A 2024 meta-analysis of 14 case-control studies showed that individuals with vitamin D deficiency (<50 nmol/L) had a 54% increased risk of MS compared to non-deficient controls (OR 1.54, 95% CI 1.05–2.24; PMID: 39180838). A prospective study in US military personnel showed a strong inverse relation between pre-diagnostic serum 25-hydroxyvitamin D levels and subsequent risk of developing MS (PMID: 17179460). Furthermore, Mendelian randomization studies consistently support a causal effect, demonstrating that genetically determined lower 25-hydroxyvitamin D levels increase MS incidence (PMID: 31937597, PMID: 38214845).

9

No source found (not proven false)

0:06:41Daniel Schmachtenbergerunverifiedvery low

Before European colonization, the population of the Americas was approximately 140 million people, and it was decimated by roughly 90% in a short period through infection, war, and displacement.

"So, North and South America, the Americas before Columbus, etc., right, before colonization was roughly, depending upon who you look at, 140 million people. And within a short period of colonization, both from infections and war and driving them out of viable habitats, the population was decimated by 90%." (said at 0:06:41)

No published record matching the claim that the pre-Columbian population of the Americas was approximately 140 million and was decimated by roughly 90% in a short period through infection, war, and displacement was located; this does not prove the claim false.

0:16:11Mark Hyman (host)unverifiedvery low

The average newborn has 287 toxins in their umbilical cord blood before taking their first breath.

"the average newborn has 287 toxins in their umbilical cord blood. And before they take their first breath." (said at 0:16:11)

No published peer-reviewed record was located establishing that the average newborn has 287 toxins in their umbilical cord blood; this does not prove the claim false. The figure of 287 chemicals originates from an unpublished 2005 non-governmental organization report (by the Environmental Working Group) involving a pilot sample of 10 infants, which detected a total across all tested subjects rather than in an individual newborn.

0:22:33Daniel Schmachtenbergerunverifiedvery low

Populations with heavy lead exposure experienced approximately four times the rate of impulse control disorders.

"And then there were also studies on increased violence and aggravation that showed that populations that were heavily exposed had something like 4x the impulse control disorders." (said at 0:22:33)

No published record matching the claim that heavily lead-exposed populations experienced approximately four times the rate of impulse control disorders was located; this does not prove the claim false.

0:27:11Mark Hyman (host)unverifiedvery low

An American Journal of Cardiology study found that having a blood lead level over 2 was a stronger risk factor for stroke and heart attack than abnormal cholesterol.

"what was really interesting was the American Journal of Cardiology found that if your lead level was over two, two out of, you know, 10, which is 39% of the population of adults and kids, it was a bigger risk factor for stroke and heart attack than having abnormal cholesterol." (said at 0:27:11)

No published record matching an American Journal of Cardiology study finding that a blood lead level over 2 was a stronger risk factor for stroke and myocardial infarction than abnormal cholesterol was located; this does not prove the claim false.

0:31:18Mark Hyman (host)unverifiedvery low

At the turn of the 20th century, the Plains Indians had the highest proportion of centenarians of any population.

"the Plains Indians had the highest number of centenarians at the turn of the century of any population." (said at 0:31:18)

No published record matching the claim that Plains Indians had the highest proportion or number of centenarians of any population at the turn of the 20th century was located; this does not prove the claim false.

0:32:08Mark Hyman (host)unverifiedvery low

A 70-year-old patient with mercury toxicity, insulin resistance, gut dysbiosis, and APOE4 status presenting with Alzheimer's disease reversed his cognitive decline following chelation therapy, methylation support, and metabolic interventions.

"I had a guy who was living in Pittsburgh who was 70 years old... And he was extremely mercury toxic and also had other issues. He had insulin resistance. He had gut issues his whole life... add all that together plus his APOE4 status, which puts him at risk, and he was presenting with Alzheimer's. And yet, by a very aggressive detoxification program, by getting the metals out of his system by chelation... by giving him methylating support, optimizing his gut function, fixing his insulin resistance, he reversed his cognitive decline" (said at 0:32:08)

No published record matching the specific clinical case of a 70-year-old patient with mercury toxicity, insulin resistance, gut dysbiosis, and APOE4 status reversing Alzheimer's disease following chelation therapy, methylation support, and metabolic interventions was located; this does not prove the claim false.

0:37:38Mark Hyman (host)unverifiedvery low

40% of Americans over age 65 take five or more prescription medications per day, and 20% take 10 or more.

"I think 40% of people who are over 65 take five or more medications a day. 20% take 10 or more medications, some of which are for the side effects of the other meds." (said at 0:37:38)

No published record matching the claim that 40% of Americans over age 65 take five or more prescription medications and 20% take 10 or more was located; this does not prove the claim false.

1:07:20Mark Hyman (host)unverifiedvery low

A historical study in an orphanage where young children were offered whole and organ foods showed they instinctively ate nutritionally complete diets and were healthier than control children on a regular diet.

"in the book, he talked about this study that was done, I think in the '20s, in an orphanage in Canada where they took kids who really hadn't been exposed to a lot of whatever junk food or American diet, and they they gave them like weird stuff like brain and organs and all kinds of weird food that we wouldn't think would be things we'd want to eat or the kids would want to eat. And these kids actually were eating completely in harmony with what their bodies needed and seeking out those foods and nutrients and the food that they needed, and were far healthier than kids in the control group that were fed a regular diet." (said at 1:07:20)

No published record matching the specific claim of a controlled orphanage study demonstrating superior health outcomes in children self-selecting whole and organ foods compared to a control group was located; this does not prove the claim false.

1:05:25Daniel Schmachtenbergerunverifiedvery low

Patients in wheelchairs at Dr. Evert Loomis's healing clinic regained the ability to walk after adopting an inpatient diet consisting solely of fresh produce picked directly from gardens and orchards.

"And we actually got to go live with that guy, Dr. Loomis, on his healing clinic when I was a kid. And I got to see people coming in in wheelchairs and leaving non-wheelchairs, just having really radical kind of change." (said at 1:05:25)

No published record matching the claim that patients in wheelchairs at Dr. Evert Loomis's clinic regained the ability to walk after adopting an inpatient diet of fresh garden produce was located; this does not prove the claim false.

Unverified means no publication matching the claim was located; it does not prove the claim false. Spotted an error? See the corrections policy - disputes from the people quoted are prioritized.