HoldsUp

Bryan Johnson · 2025-01-16 · Bryan Johnson (host), Miranda Kerr, Anthony, Talas, Mike

Watch These 86 Minutes To Rewire Your Brain (ft. Miranda Kerr)

7 research-tied claims examined: 6 supported 1 unverified

6

Supported by research

0:31:20Bryan Johnson (host)supportedhigh

Doctor handwashing between surgical operations increases patient survival rates.

"it does make sense that if a doctor is washing their hands in between surgeries, then it increases patient outcomes of survival." (said at 0:31:20)

Medical evidence and historical epidemiological data firmly support the principle that hand hygiene and surgical hand antisepsis between procedures reduce pathogenic transmission, infections, and patient mortality. The foundational evidence was established by Ignaz Semmelweis, who demonstrated that mandatory chlorinated handwashing by physicians between autopsies and obstetrical deliveries led to a dramatic reduction in maternal mortality from puerperal sepsis. Hand hygiene and surgical antisepsis remain core components of infection control practices proven to prevent life-threatening hospital-acquired and surgical site infections.

0:59:30Bryan Johnson (host)supportedlow

Smoking a single cigarette reduces an individual's life expectancy by approximately 11 minutes on average.

"smoking a cigarette costs someone 11 minutes of life on average. There's variance according to personal genetics, like some people can smoke all their life and not die. There's variance, but generally speaking, 11 minutes of life to smoke a cigarette." (said at 0:59:30)

The statement directly reflects a widely cited calculation published in the BMJ (Shaw et al., 2000), which estimated that on average, smoking a single cigarette reduces life expectancy by approximately 11 minutes. This estimate was derived from epidemiological cohort data (such as the British Doctors Study) comparing the average lifespan reduction among lifelong smokers to cumulative lifetime cigarette consumption. Because this figure is a population-level mathematical average derived from observational mortality rates rather than an individual-level biological measurement, the certainty is graded as low.

1:03:47Miranda Kerrsupportedmoderate

Food products purchased from health food stores often contain heavy metals such as lead, cadmium, and mercury.

"It's like a lot of lead, cadmium, um there's mercury... And that people are buying in these health food stores, exactly right, they're not right what they say they are." (said at 1:03:47)

Multiple chemical analytical studies of products and supplements purchased from health stores confirm frequent contamination with heavy metals, including lead, cadmium, and mercury. Testing of medicinal plant and microalgae dietary supplements detected heavy metals in 79.2% of terrestrial plant products and 88.2% of microalgae products, with lead and cadmium found in 68.3% and mercury in 29.3% of tested items. Similarly, analyses of adaptogenic herbal supplements revealed widespread lead contamination exceeding regulatory safety limits by up to 235%, and evaluations of dietary supplements purchased from health stores in Mexico confirmed detectable levels of lead, cadmium, and mercury.

1:04:07Bryan Johnson (host)supportedmoderate

Resolving air quality issues in India would extend life expectancy more than curing all cancer in the country.

"I mean, I just came back from India, and India is better off solving its air quality than it is curing all cancer. They would extend lives more." (said at 1:04:07)

Comprehensive epidemiological analyses from the Global Burden of Disease (GBD) Study and the Air Quality Life Index indicate that air pollution is responsible for a greater loss of life expectancy and total mortality in India than all cancers combined. In India, air pollution was estimated to account for 1.24 million deaths (12.5% of total deaths) in 2017 and 1.67 million deaths (17.8% of total deaths) in 2019. Eliminating air pollution exposure would increase average life expectancy in India by an estimated 1.7 years nationally (and over 2 to 5 years in heavily polluted northern states, depending on the baseline threshold used), exceeding the life expectancy gain that would result from eliminating all cancer mortality in the country (which accounts for approximately 8–9% of total deaths and roughly 1.3–1.6 years of life expectancy loss).

1:04:41Bryan Johnson (host)supportedhigh

In the United States, 42% of adults are obese.

"In the US, 42% of adults are obese." (said at 1:04:41)

According to nationally representative data from the National Health and Nutrition Examination Survey (NHANES), the age-adjusted prevalence of obesity among US adults aged 20 and older was 42.4% in 2017–2018 and 41.9% in the 2017–March 2020 prepandemic survey period, directly matching the stated 42%.

1:04:45Bryan Johnson (host)supportedmoderate

The United States ranks as the 13th worst country in the world for obesity prevalence.

"So we have a similar air pollution problem with obesity, and so we're 13th worst in the world." (said at 1:04:45)

Global epidemiological analyses of obesity prevalence across approximately 200 countries and territories—such as datasets from the NCD Risk Factor Collaboration published in The Lancet and compiled by the WHO and the CIA World Factbook—consistently rank the United States among the highest in adult obesity prevalence worldwide, typically between 10th and 14th (often cited specifically as 12th or 13th). The nations ranking higher are predominantly Pacific Island nations (such as Nauru, Cook Islands, Palau, Tuvalu, and Tonga) and select Middle Eastern nations (such as Kuwait), placing the US roughly 13th highest in adult obesity prevalence globally.

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.