HoldsUp

Sara Gottfried

Dr. Sara Gottfried is an author and researcher focused on women's health, functional medicine, and lifestyle interventions. Her published research covers topics including the vaginal microbiome, continuous glucose monitoring for pre-diabetes detection, women's cardiometabolic health, and neuroimaging studies on the effects of meditation practices on brain function and glucose metabolism.

19 claims checked on air: 4 context 2 contradicted 2 overstated 8 supported 3 unverified

What they said on air - supported

0:18:11supportedmoderateWeight Loss and the Brain - with Dr. Sara Gottfried | The E

Perimenopause lasts on average for 2 to 8 years, typically between the ages of 35 and 51.

"she looks at perimenopause, which on average lasts for women for 2 to 8 years, typically between 35 and 51" (said at 0:18:11)

Large prospective cohort data, such as the multiethnic Study of Women's Health Across the Nation (SWAN), show that the menopausal transition (perimenopause) typically lasts around 4 to 8 years on average, with median duration ranging from approximately 4.4 to 8.6 years depending on age of onset. Perimenopause generally starts in a woman's late 30s to 40s (around ages 35–45) and concludes at natural menopause, which occurs at an average age of 51.

0:18:28supportedlowWeight Loss and the Brain - with Dr. Sara Gottfried | The E

Research by Lisa Mosconi shows that women begin developing cerebral glucose hypometabolism in perimenopause, preceding Alzheimer's disease diagnosis by over 25 years.

"And what she's found is that women, starting in perimenopause, have these changes in the brain that predate the diagnosis of Alzheimer's by 25-plus years. Now, much of your work is about, okay, what can we do to prevent that arc to Alzheimer's disease? And what I think is so interesting about her work is that she's seen these changes—I think of it as kind of a slowdown in metabolism of the brain, she calls it cerebral hypometabolism, meaning that glucose just isn't taken up in the same way." (said at 0:18:28)

Neuroimaging research led by Dr. Lisa Mosconi demonstrated that women transitionally develop cerebral glucose hypometabolism in Alzheimer's disease-vulnerable brain regions starting during perimenopause (typically in their 40s and 50s), several decades before the typical age of clinical Alzheimer's disease diagnosis (typically age 75+). Using 18F-FDG-PET scans, these observational studies showed that perimenopausal and postmenopausal women exhibit significant reductions in brain glucose metabolism compared to premenopausal controls and age-matched men.

0:26:40supportedmoderateWeight Loss and the Brain - with Dr. Sara Gottfried | The E

Women diagnosed with polycystic ovary syndrome (PCOS) exhibit an altered gut microbiome and disrupted gut-brain axis compared to healthy controls.

"We know that women with PCOS have an altered microbiome. We know that gut-brain axis is not normal." (said at 0:26:40)

Multiple systematic reviews and meta-analyses of human observational studies demonstrate that women diagnosed with polycystic ovary syndrome (PCOS) exhibit significant gut microbial dysbiosis compared to healthy controls, characterized by reduced alpha diversity (e.g., lower Chao and Shannon indices) and alterations in relative bacterial abundances (PMID: 37739322, PMID: 37559119). Human clinical case-control studies and systematic reviews also confirm dysregulation of gut-brain axis mediators, including significantly lower serum levels of gut-brain signaling peptides such as ghrelin and serotonin, as well as altered gut microbiome-mediated neuroendocrine pathways (PMID: 42076786, PMID: 40967455).

0:26:44supportedmoderateWeight Loss and the Brain - with Dr. Sara Gottfried | The E

An October 2018 study from the University of Texas demonstrated that individuals in midlife (in their 40s) in the top third of cortisol levels have brain shrinkage along with reduced memory and visual perception.

"She shared with me some data from October 2018 from the University of Texas. I'm sure you probably saw this data too, showing that in midlife, starting in your 40s in both men and women, stress has major effects on brain structure and function. So we know that women are more vulnerable than men. We know that high levels of stress, so if you take the people who have kind of the top third in terms of cortisol, the main hormone of stress, they have shrinkage of the brain. And I haven't seen a lot of data on that in women in their 40s. So I think this is really important. So it affects the structure of the brain, it reduces the volume of the brain, and it also is associated with reduced memory and visual perception." (said at 0:26:44)

A cross-sectional analysis from the Framingham Heart Study led by researchers at the University of Texas Health Science Center at San Antonio (published in Neurology in October 2018) examined 2,231 dementia-free participants with a mean age of 48.5 years. The authors found that individuals in the highest tertile of fasting morning cortisol had significantly lower total cerebral brain volume, reduced frontal and occipital gray matter volumes, and poorer performance on tests of memory and visual perception compared to those in the middle tertile. Furthermore, the inverse association between cortisol and total brain volume was statistically significant in women but not in men.

0:36:15supportedmoderateWeight Loss and the Brain - with Dr. Sara Gottfried | The E

Gut bacterial beta-glucuronidase deconjugates estrogen metabolites, and gut dysbiosis can cause estrogen recirculation and elevated estradiol levels.

"We know that women tend to modulate estrogen levels differently than men, and much of that is governed by a certain set of bacteria. And what we're talking about here is an enzyme called beta-glucuronidase. And so the idea with estrogen as the master regulator in the female body is that you want to produce it, you want to use it, and then you want to get rid of it. You don't want it recirculating in the body over and over again like bad karma. And if you have kind of the dysbiosis, the wrong balance of microbes in your gut, you're more likely to keep recycling it and for your estradiol levels to climb, to get too high." (said at 0:36:15)

Published literature supports the role of the gut microbiome—specifically the 'estrobolome'—in estrogen metabolism and recirculation. Estrogens are conjugated in the liver (e.g., glucuronidation) and excreted via bile into the gastrointestinal tract. Bacterial enzymes, predominantly microbial β-glucuronidases (and sulfatases), deconjugate these metabolites back into free estrogens, permitting their reabsorption across the gut mucosa into the enterohepatic circulation. Alterations or shifts in the composition and enzymatic activity of the gut microbiota can increase deconjugation and reabsorption, raising systemic free estradiol levels.

0:39:35supportedvery lowWeight Loss and the Brain - with Dr. Sara Gottfried | The E

The estrogen 4-quinone metabolic pathway is genotoxic and causes mutations and DNA damage.

"And there's even a 4-quinone pathway that is especially genotoxic, so it can cause mutations and damage to DNA." (said at 0:39:35)

Preclinical in vitro and animal studies demonstrate that metabolism of estrogens via 4-hydroxylation leads to the formation of catechol estrogen-3,4-quinones (CE-3,4-Q). These electrophilic metabolites covalently react with DNA purine bases, primarily forming depurinating adducts (4-OHE1/E2-1-N3Ade and 4-OHE1/E2-1-N7Gua). The resulting apurinic sites and redox-cycling reactive oxygen species cause DNA strand breaks, base damage, and error-prone repair mutations.

0:43:35supportedlowWeight Loss and the Brain - with Dr. Sara Gottfried | The E

80% of Americans eat food in their car.

"I was horrified to read this statistic that 80% of Americans eat in their car." (said at 0:43:35)

Published sociological research on mobile eating patterns reports that over 80% of North Americans regularly eat in their cars, aligning with the cited statistic.

0:44:10supportedmoderateWeight Loss and the Brain - with Dr. Sara Gottfried | The E

Perceptions of social isolation, rejection, or conflict trigger the immune system to ramp up inflammation even in the absence of actual physical injury.

"what happens with the way our DNA evolved is that if you have this perception of social isolation, social rejection, or social conflict, it cues the immune system to prepare for physical injury, meaning that it ramps up and becomes inflamed even in the absence of any sort of physical injury actually occurring." (said at 0:44:10)

Published research in human social genomics confirms that perceived social isolation, rejection, and social threat activate a conserved transcriptional response to adversity (CTRA) in leukocytes. This pattern involves the up-regulation of pro-inflammatory gene expression and the down-regulation of type I interferon and antibody-related genes via sympathetic nervous system signaling, even without physical injury or acute microbial infection. Evolutionary models and empirical human and non-human primate studies demonstrate that the nervous system interprets social threat as a cue to bias immune transcription toward wound healing and antibacterial inflammatory pathways.

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