Browse the evidence

Prebiotics (e.g., oligofructose, inulin) can improve metabolic phenotypes, reduce triglycerides, and increase satiety hormones (GLP-1, PYY) in animal models, potentially aiding weight control.

If you are considering probiotics for weight management, look for specific strains like Lactobacillus casei Shirota, L. gasseri, L. rhamnosus, or L. plantarum, as well as Bifidobacterium infantis, longum, and breve. However, do not expect all probiotics to work, as some strains have shown no effect or even increased weight gain in studies.

Gut dysbiosis, characterized by a decrease in beneficial commensals (e.g., Akkermansia muciniphila) and short-chain fatty acids (SCFAs) and an increase in pro-inflammatory microbes, triggers systemic inflammation (inflammaging) and gut leakiness, which are primary drivers of aging-associated morbidities and premature death in the elderly.

Focus on maintaining a diverse and healthy gut microbiome through diet and lifestyle choices, as this appears to be a key factor in healthy aging and longevity. This includes consuming fiber-rich foods to support beneficial bacteria and SCFA production, and potentially avoiding unnecessary antibiotics. While individual results may vary, the evidence suggests that gut health is a critical lever for mitigating age-related decline.

Increased DNA methylation age (epigenetic age acceleration) is associated with an 8-15% increased risk of all-cause mortality for every 5-year increase in epigenetic age.

This paper establishes that your biological age, measured by DNA methylation patterns, is a stronger predictor of death than your calendar age. While this specific paper does not offer an intervention, it implies that factors accelerating biological age (like smoking, obesity, or stress, which are linked to higher DNAmAge) are modifiable risk factors for mortality. Focus on lifestyle factors known to reduce inflammation and oxidative stress, as these are correlated with slower epigenetic aging.

Obesogenic endocrine disruptors are lipophilic and bioaccumulate in fat tissue, creating a 'vicious spiral' where increased body fat leads to greater retention of these chemicals, which in turn promotes further fat storage.

Be aware that obesity can trap environmental toxins in your fat, which may then fuel further fat storage. Gradual weight loss is preferable to rapid dieting, as it allows your body time to metabolize and eliminate stored chemicals. Reducing exposure to plastics and personal care products can help break this cycle.

Activation of the kynurenine pathway via IDO/TDO enzymes during inflammation promotes immune tolerance and prevents hyperinflammation by depleting tryptophan and producing kynurenine, which activates the aryl hydrocarbon receptor (AhR) to drive regulatory T cell differentiation.

This paper highlights that the body's natural response to stress (inflammation) involves shifting tryptophan metabolism to protect against excessive immune damage. While not a direct supplement protocol, it suggests that maintaining healthy tryptophan metabolism and understanding the balance of immune response is crucial for aging. Future therapies might target this pathway, but currently, no specific dose is recommended for general use.

Targeting tryptophan metabolism, specifically by inhibiting TDO or boosting de novo NAD+ synthesis, may extend lifespan and improve metabolic health in animal models.

Current research suggests that modulating tryptophan metabolism (e.g., boosting NAD+ synthesis) might improve metabolic health and potentially extend lifespan in animals. However, this is not yet a recommended human intervention due to potential risks like aggravated inflammation. Focus on healthy lifestyle factors that naturally support metabolic health.

Sirtuins (SIRTs) are potential therapeutic targets for NAFLD treatment, with SIRT1 playing a key role in regulating lipid metabolism and autophagy.

Sirtuins are being studied as potential drug targets for NAFLD, but no specific sirtuin-activating supplements or drugs are currently recommended for treatment.

Maternal 1-hour glucose levels during pregnancy are specifically associated with an increased risk of childhood prehypertension or hypertension, independent of other glucose measures.

If a mother has a high 1-hour glucose level during her pregnancy, her child may be at a higher risk for high blood pressure in childhood. This highlights the importance of monitoring blood pressure in children born to mothers with elevated 1-hour glucose levels, even if their fasting glucose was normal.

The method of diagnosing diabetes significantly impacts the observed prevalence in PCOS, with self-report or administrative records doubling the odds ratio compared to prospective blood-based techniques.

If you are looking at statistics about PCOS and diabetes, be careful about how 'diabetes' was defined. Studies using blood tests (OGTT) find lower rates than those using medical records, because many women with PCOS are undiagnosed. This highlights the need for active screening.

Sustainable intensification of livestock production can significantly reduce greenhouse gas emissions per unit of food produced while maintaining or increasing nutritional output.

For producers and policymakers, focusing on sustainable intensification (better genetics, feed, and management) can reduce the environmental footprint of livestock while increasing food security. For consumers, this means that moderate ASF consumption in developing regions is not inherently unsustainable if production methods are improved.

Exposure to environmental endocrine-disrupting chemicals (EDCs) such as BPA, phthalates, and persistent organic pollutants acts as an obesogen, contributing to obesity, metabolic syndrome, and type 2 diabetes by disrupting endocrine pathways, adipogenesis, and gut microbiota.

Reduce exposure to known endocrine disruptors by avoiding heating food in plastic containers, choosing glass or stainless steel for water storage, and filtering drinking water. Be aware that these chemicals are ubiquitous in plastics, pesticides, and personal care products, and early-life exposure may have long-term metabolic consequences.

Exposure to environmental endocrine-disrupting chemicals (EDCs) is associated with adverse reproductive health outcomes in both males and females, including reduced fertility, altered puberty timing, and increased risk of conditions like PCOS and endometriosis.

Minimize exposure to EDCs by avoiding plastic food containers, especially when heating food, and choosing personal care products free of phthalates and parabens. This is particularly important for those planning pregnancy or currently pregnant.

Chronic treatment with the beta-3 adrenergic receptor agonist mirabegron increases brown adipose tissue (BAT) metabolic activity and volume in healthy women without altering body weight.

This study suggests that the bladder medication Mirabegron, when taken chronically at a dose higher than standard (100mg vs 50mg), can activate brown fat and increase its volume in healthy women without causing weight gain. However, because the study was small, open-label, and lacked a placebo, these results should be viewed as preliminary evidence that beta-3 stimulation is a viable pathway for metabolic health, pending larger controlled trials.

Chronic mirabegron treatment improves insulin sensitivity, glucose effectiveness, and pancreatic beta-cell function in healthy women.

Mirabegron, taken at 100mg daily for 4 weeks, significantly improved insulin sensitivity and glucose handling in healthy women. This suggests beta-3 stimulation is a potent lever for metabolic health, though the high dose used here caused mild cardiovascular side effects, suggesting future drugs need better selectivity.

Chronic mirabegron treatment increases plasma levels of HDL cholesterol, ApoA1, and bile acids, independent of weight loss.

Mirabegron treatment improved favorable lipid markers (HDL, ApoA1) and bile acids. This may be a downstream effect of increased brown fat activity consuming lipoproteins. This benefit occurred without weight loss.

Sodium (Na+) and Potassium (K+) levels in iontophoretic sweat are positively correlated within individuals, but across a population, individuals with higher sodium levels tend to have lower potassium levels.

If you are monitoring electrolytes, be aware that your body's balance of sodium and potassium in sweat is individual. High sodium excretion might correlate with lower potassium excretion for you specifically, but this pattern may not hold true when comparing you to others.

Stimulating mitophagy (the removal of damaged mitochondria) using compounds like spermidine or urolithin A can prevent age-related pathologies and extend lifespan in model organisms.

Dietary sources of spermidine (e.g., wheat germ, cheese) and urolithin A precursors (pomegranate) may support mitochondrial quality control. However, do not expect these to replace exercise or guarantee lifespan extension in humans based on current evidence.

Gut microbiota dysbiosis in women with Polycystic Ovary Syndrome (PCOS) is significantly associated with clinical phenotypes, including elevated testosterone, increased waist circumference, and altered brain-gut peptides (serotonin, ghrelin, PYY).

This research suggests that the gut health of women with PCOS differs from controls, specifically showing lower levels of beneficial bacteria (like Akkermansia) and higher levels of potentially inflammatory bacteria (like Escherichia/Shigella). These microbial differences are linked to higher testosterone and waist circumference. While this study does not prescribe a specific diet, it supports the investigation of dietary interventions aimed at improving gut microbiota diversity as a potential strategy to manage PCOS symptoms.

High-fructose diets promote visceral adipose tissue accumulation and insulin resistance, which indirectly drives intrahepatic lipid accumulation by increasing the flux of free fatty acids from adipose tissue to the liver.

Fructose may contribute to belly fat (visceral adiposity) more than glucose in some studies. This belly fat releases fatty acids into the liver, worsening fatty liver. This is an indirect effect. Managing overall weight and insulin sensitivity is key to reducing this flux.

High adherence to the Mediterranean diet does not significantly reduce the risk of prostate, pancreatic, esophageal, or blood cancers.

Do not rely on the Mediterranean diet to prevent prostate, pancreatic, esophageal, or blood cancers. While it offers protection against other cancers and mortality, these specific cancers may require different prevention strategies or screening protocols.

Soy Protein Isolate (SPI) and purified soy isoflavones (genistein, daidzein) exhibit weak estrogenic activity that may pose risks for reproductive health, early development, and estrogen-sensitive cancers, despite conflicting evidence from some human studies.

If you are taking soy protein isolate or purified soy isoflavone supplements (not just eating tofu/edamame), be aware they have weak estrogenic effects. Women with a history of endometriosis or estrogen-sensitive cancers should consult a doctor before using these supplements, as they may increase risk. Infants should generally be fed cow milk formula unless soy is medically indicated.

ATF3 acts as a master regulator of metabolic homeostasis and oncogenesis, functioning as a context-dependent hub that can either suppress or promote disease states depending on tissue type and cellular stress.

This paper identifies ATF3 as a critical biological switch in metabolism and cancer. While not a direct intervention for humans yet, it suggests that therapies targeting ATF3 induction (like ST32da) or inhibition could treat metabolic disorders and cancers. Current research focuses on how stress signals trigger ATF3 to regulate glucose and fat storage.

ATF3 induction by synthetic agents like ST32da promotes adipocyte browning and inhibits lipogenesis, potentially offering a mechanism to combat obesity.

Research indicates that inducing ATF3 expression can help convert white fat to beige/brown fat, which burns energy. A synthetic inducer called ST32da was shown to do this in mice by blocking specific fat-making pathways. This is not yet a available treatment for humans.

ATF3 plays a dual role in prostate cancer, acting as a tumor suppressor by inhibiting androgen signaling and AKT, but also as an oncogene by promoting cell proliferation and metastasis via SUMOylation.

ATF3's role in prostate cancer is complex. It can suppress tumors by blocking androgen signals but can also promote cancer if modified by SUMOylation. This complexity makes it a challenging but potentially valuable target for therapy.