Browse the evidence

Gut microbiota depletion (via antibiotics or germ-free conditions) leads to muscle atrophy and reduced physical function, suggesting a causal link between microbiota presence and muscle maintenance.

This finding is primarily relevant for understanding the biological basis of muscle loss. For now, it supports the general importance of a healthy diet for gut microbiota, but does not yet justify specific interventions like antibiotics avoidance for muscle gain in healthy individuals.

Rapid Eye Movement (REM) Sleep Behavioural Disorder (RBD), Apnoea, and Long Time in Bed (TIB) are associated with a higher risk of cognitive disorders.

If you have been diagnosed with REM Sleep Behavioural Disorder (RBD), sleep apnoea, or consistently spend excessive time in bed (TIB) without sleeping, these are linked to a higher risk of cognitive decline. Seek medical evaluation and treatment for these conditions as part of your long-term brain health strategy.

FMT shows promise in treating Inflammatory Bowel Disease (IBD), including Ulcerative Colitis (UC) and Crohn's Disease (CD), but efficacy is lower and more variable than in CDI, with clinical remission rates around 36-45% in systematic reviews.

For those with Ulcerative Colitis or Crohn's Disease who haven't responded well to standard treatments, FMT might be an option. While not as consistently effective as for C. diff, some patients do achieve remission, especially younger individuals. It requires careful consideration of the risks and benefits, and multiple treatments may be needed.

Resistance training leads to structural brain changes, specifically lower white matter atrophy and smaller white matter lesion volumes.

Regular resistance training helps preserve the brain's structural integrity by reducing white matter atrophy and lesion volumes, which supports long-term cognitive health.

High adherence to the Mediterranean diet is associated with higher defecation frequency and more pronounced gastrointestinal symptomatology (pain, bloating) compared to low adherence.

If you increase your adherence to a Mediterranean diet, expect your bowel movements to become more frequent. However, be prepared for a potential increase in gastrointestinal symptoms, specifically abdominal pain and bloating, which were significantly higher in high-adherence groups in this study.

Female gender is associated with a lower risk of Shift Work Disorder symptoms compared to male gender in this nursing population.

While women are often thought to be more vulnerable to shift work, this study found female nurses had a lower risk of SWD symptoms than male nurses. This may reflect selection bias in the nursing profession.

Synbiotic supplementation (Lactobacillus/Bifidobacterium + GOS) during a low-carbohydrate high-protein weight loss program does not significantly improve body composition or weight loss outcomes compared to placebo.

If you are following a low-carb, high-protein weight loss diet, adding this specific synbiotic supplement (Lactobacillus/Bifidobacterium + GOS) for 3 months will not help you lose more weight or body fat than the diet alone. The diet works; the supplement did not add to it in this study.

Synbiotic supplementation significantly alters gut microbiota composition by increasing the abundance of Lactobacillus and Bifidobacterium, but this change is not associated with improved body composition.

The supplement successfully changed your gut bacteria levels, increasing beneficial strains like Lactobacillus. However, this biological change did not result in weight loss or body composition changes in this study.

Roux-en-Y gastric bypass (RYGB) surgery induces rapid, persistent, and distinct alterations in gut microbiota composition and function, including increased diversity and specific taxonomic shifts, which occur largely within the first 3 months and are maintained for at least one year.

If you undergo RYGB surgery, expect your gut bacteria to change significantly within the first 3 months. These changes include increased diversity and shifts in specific bacteria (like increased E. coli and decreased F. prausnitzii). These changes are linked to metabolic improvements and are maintained for at least a year. You must take prescribed supplements (B12, Calcium, etc.) as your anatomy has changed, affecting nutrient absorption. Dietary choices should support this new microbial environment, potentially favoring foods that support the observed shifts (e.g., proteins, fibers that support transport systems).

Epigenetic age acceleration (DNA methylation age minus chronological age) is positively associated with clinical frailty, whereas telomere length shows no significant association with either epigenetic age acceleration or frailty.

Use epigenetic age acceleration as a biomarker for overall health status rather than a deterministic prediction of your lifespan. Since it correlates with frailty, focusing on building physical resilience (strength, balance, activity) and managing chronic conditions may help align your epigenetic age with your chronological age. Do not rely on telomere length as a primary health indicator, as this study found no link to frailty.

Accumulation of lipid peroxidation-derived aldehydes, specifically 4-hydroxynonenal (HNE) and malondialdehyde (MDA), drives age-related tissue degeneration (osteopenia, sarcopenia, immunosenescence) by forming toxic protein adducts that induce apoptosis and cellular dysfunction.

Aging involves the accumulation of toxic byproducts from fat breakdown (lipid peroxidation), specifically HNE and MDA, which damage proteins and cause cell death in muscles and bones. While this paper focuses on mechanisms rather than direct lifestyle advice, it implies that reducing oxidative stress (e.g., through diet or exercise that lowers ROS) may mitigate the formation of these toxic aldehydes and slow age-related tissue loss.

Slowing fundamental biological processes of aging (e.g., inflammation, mitochondrial dysfunction) is a strategic approach to delay the onset of all major chronic diseases by a mean of 7 years, thereby increasing healthspan.

While specific 'anti-aging' drugs are not yet standard, the goal is to slow biological aging. Current best practice is to combine regular physical activity and healthy diet to target these fundamental processes.

Bariatric surgery is NOT associated with a significantly lower risk of incident cerebrovascular disease (stroke) compared to usual medical care in patients with type 2 diabetes and severe obesity at 5 years.

For patients with severe obesity and type 2 diabetes, bariatric surgery is associated with a significantly lower risk of coronary artery disease, but the reduction in stroke risk was not statistically significant at 5 years.

Early-life gut dysbiosis, caused by factors such as cesarean section, antibiotic exposure, or formula feeding, is associated with an increased risk of developing metabolic disorders (obesity, diabetes) and immune-mediated diseases (asthma, allergies) in later life.

The composition of your infant's gut microbiota in the first few years of life, influenced by birth mode, feeding type, and antibiotic use, may program their long-term risk for obesity, diabetes, and allergies. While you cannot change birth mode or past antibiotic use, focusing on a diverse, fiber-rich diet for the child as they grow may support a healthy microbiome development.

In elderly men (aged 70-79), a rapid rate of leukocyte telomere shortening over a 2.5-year period predicts a threefold increase in subsequent 12-year cardiovascular disease mortality, whereas baseline telomere length does not.

For elderly men, monitoring the rate of biological aging (specifically telomere attrition) may be a more useful prognostic indicator for heart disease risk than a single snapshot of telomere length. While this is a biomarker and not an intervention, it suggests that maintaining cellular health and minimizing oxidative stress/inflammation over time is critical for longevity.

The PER3 VNTR polymorphism in humans affects sleep homeostasis, specifically accelerating the buildup of sleep pressure and altering slow-wave sleep, independent of circadian phase shifts.

If you have the PER3 long variant (often associated with morningness), your brain builds sleep pressure faster. This means you may feel sleepier earlier in the day and have more slow-wave sleep. Align your schedule with this faster buildup to avoid excessive sleepiness during the day or difficulty staying awake.

Light-to-moderate alcohol consumption is associated with a reduced risk of incident dementia and Alzheimer's disease, but evidence for vascular dementia is only suggestive.

If you already drink alcohol, light-to-moderate consumption (e.g., wine with meals) may be associated with a lower risk of Alzheimer's disease. Do not start drinking if you do not already. The evidence for vascular dementia is less clear.

Elevated gut microbiome abundance of Christensenellaceae, Porphyromonadaceae, and Rikenellaceae is associated with reduced visceral adipose tissue (VAT) and a healthier metabolic profile in elderly individuals.

For elderly individuals, maintaining a gut microbiome enriched in Christensenellaceae, Porphyromonadaceae, and Rikenellaceae may be associated with lower visceral fat and better metabolic health. This suggests that dietary strategies supporting these specific bacteria could be beneficial for healthy aging.

Pharmacological activation of AMPK using metformin or berberine prevents oxidative stress-induced cellular senescence by restoring autophagic flux and elevating intracellular NAD+ levels.

This research suggests that maintaining cellular energy balance via AMPK activation (through lifestyle or pharmacological means like metformin/berberine) may help cells resist aging-related damage. However, this is based on cell cultures, not humans. Do not self-prescribe metformin or berberine for anti-aging without medical supervision, as the optimal dosing and long-term safety in healthy humans are not established by this study.

Depression and insomnia are associated with specific alterations in gut microbiota composition, including decreased Bacteroidetes and increased Firmicutes/Actinobacteria, suggesting a bidirectional link between mental health and gut ecology.

If you have depression or insomnia, your gut health may be a contributing factor. While not a cure-all, addressing gut health through diet and potentially probiotics may support mental health treatment.

Olive oil polyphenols (specifically oleuropein and hydroxytyrosol) act as caloric restriction mimetics by activating sirtuins (Sirt1), AMPK, and Nrf2 pathways, thereby inducing autophagy and reducing inflammation without actual caloric restriction.

Incorporate high-polyphenol extra virgin olive oil into your diet regularly. This provides compounds that mimic the cellular benefits of caloric restriction, such as improved metabolic health and reduced inflammation, without needing to drastically reduce food intake.

Olive polyphenols (oleuropein and hydroxytyrosol) exhibit anti-cancer properties by inducing apoptosis, inhibiting angiogenesis, and preventing metastasis in various cancer cell types, including breast, prostate, and pancreatic cancer.

While not a cure, consuming olive oil rich in polyphenols may support cancer prevention and potentially enhance the effectiveness of certain treatments. Focus on high-quality EVOO as part of a balanced diet.

The effect of MUFA on Coronary Heart Disease (CHD) events is ambiguous, with some meta-analyses showing increased risk and others showing decreased risk.

While MUFA improves risk factors like blood pressure and lipids, its direct impact on preventing heart attacks is not yet clearly proven in long-term observational studies, so it should be part of a broader healthy diet rather than a standalone cure.

Young men are the only demographic group capable of retaining a significant portion of muscle volume gains after 31 weeks of detraining.

If you are an older adult or a woman, be aware that you may lose most of your muscle gains after 31 weeks of stopping training. Young men might retain some, but consistent training is necessary for everyone to maintain muscle mass.