Browse the evidence

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.

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.

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.

There is currently insufficient evidence from interventional studies to establish a causal link between plant-based diets and improved cognitive function or mental health.

Do not expect plant-based diets to directly improve cognitive function or mental health based on current evidence. While metabolic health improves significantly, the link to brain health remains speculative and requires more research.

Aging is a multifactorial biological process driven by interconnected molecular changes across genomics, epigenomics, transcriptomics, proteomics, and metabolomics, which can be mapped and potentially intervened upon through multi-omics analysis.

This paper does not provide a specific user protocol. It establishes that aging is a complex, multi-layered biological process involving genes, proteins, and metabolism, and that scientific databases exist to track these changes across species to develop interventions.

DNA methylation biomarkers in blood (e.g., ANK1, DAPK1, BDNF) are associated with Alzheimer's Disease (AD) risk and neuropathology, potentially enabling earlier detection.

If you have a family history of Alzheimer's, discuss emerging blood-based epigenetic biomarkers with your doctor. While not yet standard, these tests may offer earlier insights into risk, allowing for proactive lifestyle and medical management.

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.

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.

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.

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.

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.

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.

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.

The health benefits of dietary polyphenols are not determined by the polyphenols themselves, but by the specific microbial metabolites (postbiotics) produced by an individual's gut microbiota, leading to significant inter-individual variability in health outcomes.

Don't just focus on eating polyphenol-rich foods; understand that your gut bacteria decide if those foods help you. Some people convert these compounds into powerful health-promoting metabolites (postbiotics), while others do not. This explains why the same diet affects people differently.

Physical activity is not consistently associated with a reduced risk of incident hypertension.

While exercise is crucial for heart health and diabetes prevention, do not rely on it alone to prevent high blood pressure. The evidence is inconsistent. Monitor your blood pressure and consult a doctor for specific management strategies, as lifestyle factors other than PA may play a larger role in hypertension.

Enhancing autophagic activity, particularly through genetic upregulation of autophagy-related genes (e.g., Atg5) or chaperone-mediated autophagy receptors (LAMP2A), extends lifespan and mitigates age-related physiological decline in mammalian models.

While you cannot directly 'dose' autophagy like a supplement, the paper highlights that nutrient restriction (Caloric Restriction) and specific stressors (like exercise or low-dose stressors inducing hormesis) activate autophagy. The most actionable takeaway is that maintaining metabolic flexibility and avoiding chronic overnutrition supports the autophagic clearance mechanisms that decline with age.

Polysomnographic (PSG) measures do not consistently show sleep architecture changes linked directly to menopausal stage, despite strong self-report of sleep difficulties.

If your sleep study (PSG) looks normal but you feel tired, your sleep disturbance is real. Menopausal sleep issues often involve subjective quality and fragmentation (like from hot flashes) rather than gross architectural changes. Trust your experience and seek treatment for symptoms.

Centenarians exhibit a distinct gut microbiota profile characterized by increased diversity and enrichment of specific beneficial taxa (Akkermansia, Christensenellaceae, Bifidobacterium) alongside an increase in facultative anaerobes (Proteobacteria), which correlates with longevity and healthy aging.

While you cannot simply 'take' a centenarian microbiota, the research suggests that maintaining high microbial diversity and supporting beneficial taxa (like Akkermansia and Christensenellaceae) through a diverse, fiber-rich diet and healthy lifestyle may support the adaptive gut ecosystem associated with healthy aging.

Deficiencies in pattern recognition receptors (TLRs and NLRs) or their signaling pathways lead to dysbiosis, impaired mucosal barrier function, and increased susceptibility to inflammatory bowel disease (IBD) and metabolic syndrome.

Maintain a healthy gut barrier by supporting your immune system's ability to sense bacteria. This involves consuming fiber to produce SCFAs, which help regulate immune receptors. If you have a family history of IBD or metabolic syndrome, prioritizing gut health through diet is crucial to compensate for potential receptor sensitivities.

Gut microbiota composition influences the efficacy of metabolic treatments like bariatric surgery and metformin, and contributes to vagal desensitization in obesity.

If you are on metformin or had bariatric surgery, your gut bacteria matter. A diet that supports a healthy microbiome can enhance the effectiveness of these treatments. Conversely, a poor diet may contribute to 'vagal desensitization,' making weight loss harder.