Browse the evidence

Caloric restriction extends lifespan in diverse organisms, and sirtuins (specifically Sir2/SIRT1) are proposed mediators of this effect by sensing cellular energy status via NAD+ dependence.

Caloric restriction (eating ~20% fewer calories while maintaining nutrition) is the most robust non-genetic intervention for extending lifespan in mammals. This benefit is mechanistically linked to sirtuins, which act as energy sensors. While human lifespan extension is not yet proven, CR improves metabolic health markers (blood glucose, body fat) in primates. To leverage this, focus on nutrient-dense foods and moderate caloric intake, acknowledging that sirtuin activation requires functional NAD+ metabolism.

Increased abundance of Lachnospiraceae, particularly Blautia and Roseburia, is associated with metabolic disturbances, including obesity and type 2 diabetes, primarily through enhanced energy extraction from dietary carbohydrates and elevated circulating short-chain fatty acids (SCFAs).

If you are managing weight or blood sugar, be aware that not all fiber-fermenting bacteria are equal. An overgrowth of Lachnospiraceae (like Blautia) can actually increase the calories you absorb from carbohydrates, potentially worsening metabolic health. Focus on dietary patterns that support a balanced microbiome rather than just maximizing 'good bacteria' counts, especially if you consume high-carb diets.

Childhood sleep problems predict higher levels of depression and anxiety, but this relationship is not bidirectional (depression does not predict childhood sleep problems).

For children with persistent sleep issues, prioritize sleep hygiene and evaluation early, as this is a risk factor for developing depression and anxiety later. Treating sleep may mitigate this risk.

Reducing antinutrients (e.g., phytate, polyphenolics) in staple crops to improve micronutrient bioavailability must be done with caution due to potential negative impacts on plant stress resistance and human health benefits (e.g., anticarcinogenic effects).

When breeding or processing foods to increase iron or zinc absorption, do not simply strip away all 'antinutrients' like phytates, as they may offer health benefits and protect the plant. Balance is key.

Obesity induces systemic oxidative stress and chronic low-grade inflammation through adipose tissue dysfunction, specifically via increased adipokine secretion (leptin, TNF-α, IL-6) and mitochondrial ROS production, which leads to endothelial dysfunction and insulin resistance.

Recognize that excess body fat, especially visceral fat, is biologically active and drives inflammation and metabolic issues. This is not just 'extra weight' but a source of hormones that disrupt your body's balance. Addressing obesity requires managing this hormonal output, not just counting calories.

Wheat breeding can enhance health benefits by selecting for higher levels of beneficial components like dietary fiber and protein, without necessarily compromising yield.

Support agricultural research that breeds wheat for higher fiber and protein content. This allows consumers to get more health benefits from the same amount of food without needing to change their diet drastically.

Oxidative stress, generated by mitochondrial overproduction of superoxide due to glucose and free fatty acid overload, is the common pathogenic mechanism linking insulin resistance, beta-cell dysfunction, and endothelial dysfunction, thereby driving the progression from insulin resistance to type 2 diabetes and cardiovascular disease.

Focus on reducing cellular stress, not just blood sugar. This involves managing caloric intake and increasing physical activity to prevent the overload of glucose and fatty acids in cells, which generates damaging oxidative stress. This approach may help prevent both diabetes and cardiovascular disease by addressing the root cause of cellular dysfunction.

Propionate, a short-chain fatty acid produced from carbohydrate fermentation, can inhibit the conversion of acetate to cholesterol and fat, potentially reducing intra-abdominal tissue accretion and intrahepatocellular lipid content in overweight adults.

Foods that promote the production of propionate (a type of SCFA) in the gut may help manage body fat and liver fat levels. This suggests that the type of fiber you eat matters for metabolic health, not just total fiber intake.

Immunosenescence and inflamm-aging are not merely detrimental processes but are adaptive, energy-conserving mechanisms that support longevity by prioritizing survival over rapid pathogen eradation.

Do not assume that 'boosting' your immune system to youthful levels is always beneficial for longevity. The aging immune system undergoes 'immunoremodeling' to save energy and reduce oxidative stress, which may support a longer life. Focus on maintaining homeostasis and managing inflammation rather than aggressively trying to restore youthful immune metrics.

Intravenous n-3 fatty acids (fish oil emulsions) reduce inflammation and improve outcomes in critically ill patients, including reduced infection rates and shorter hospital stays.

In hospital settings for critically ill patients, intravenous fish oil is used to modulate the severe inflammatory response. Evidence suggests it can help reduce infections and shorten the time patients spend in the hospital or on ventilators.

Plasma ghrelin exhibits a diurnal pattern with preprandial increases and postprandial decreases, peaking at 0200 h, suggesting ghrelin acts as a meal-initiation signal entrained to sleep and meal timing.

Your hunger hormone (ghrelin) naturally rises before meals and peaks in the early morning hours (around 2 AM). This rhythm suggests that late-night hunger is biologically driven. Aligning your last meal with this natural dip might help manage overnight cravings.

Telomere length is a valid biological age predictor that correlates with mortality, particularly for cancer and cardiovascular disease, and is independent of epigenetic clocks, though its predictive power varies by cancer type and sex.

Telomere length is a useful marker for cardiovascular and specific cancer risks, but it is not a magic bullet for overall cancer prevention. Women naturally have longer telomeres, which may contribute to longevity. While you cannot directly 'lengthen' telomeres safely with current supplements, maintaining cardiovascular health and avoiding smoking may support telomere integrity. It is one piece of the puzzle, not the whole picture.

Composite biomarker predictors, which combine multiple clinical and biochemical markers (e.g., CRP, creatinine, blood pressure), are effective biological age predictors that correlate with mortality, physical function, and cognitive decline, often outperforming single biomarkers like telomere length.

Composite biomarker scores, which combine multiple blood tests and clinical measures (like blood pressure and cholesterol), are powerful tools for assessing biological age. They often predict health outcomes and mortality better than single markers. While more complex to obtain, they provide a more comprehensive view of your systemic health than a single test, helping to identify risks that might be missed by looking at one factor alone.

Gut microbiota composition and activity directly influence central nervous system function, behavior, and stress responsiveness through bidirectional signaling via neural, endocrine, and immune pathways.

Your gut health is connected to your brain health through multiple biological pathways (nerves, hormones, immune system). While you can't just take a probiotic to cure depression or anxiety, maintaining a diverse microbiome through a fiber-rich diet may support overall brain and gut function. Be skeptical of claims that a specific probiotic will fix mental health issues, as human results are inconsistent. Focus on long-term dietary patterns rather than quick fixes.

The association between short sleep duration and hypertension is not observed in adults aged 60 and older.

If you are over 60, the link between short sleep and high blood pressure may not be as strong as it is for younger adults. This might be due to other age-related factors like arterial stiffness or changes in sleep patterns.

Higher sodium intake is associated with an increased risk of stroke, stroke mortality, and coronary heart disease mortality in adults.

While direct mortality data from trials is limited, observational evidence suggests that high sodium intake increases the risk of stroke and heart disease death. Maintaining moderate sodium levels supports long-term cardiovascular health.

Telomere erosion is a primary driver of senescence and aging, although its relative importance varies between species.

Telomere shortening contributes to cellular aging, but it is not the only factor. Other mechanisms like metabolic dysfunction and inflammation also play critical roles. A holistic approach to health is necessary.

In young obese subjects, lower fecal Escherichia coli abundance is associated with higher serum lipopolysaccharide (LPS) levels, indicating that reduced E. coli may increase the risk of metabolic endotoxemia.

If you are obese, having very low levels of E. coli in your gut might actually be a risk factor for metabolic issues like inflammation, rather than a benefit. This suggests that simply trying to eliminate all bacteria is not the right approach; maintaining a balanced microbiome is key.

Higher serum lipopolysaccharide (LPS) levels in obese young subjects are positively correlated with BMI, waist circumference, and triglyceride levels, linking metabolic endotoxemia to central adiposity.

For young obese individuals, higher levels of gut-derived toxins (LPS) in the blood are linked to higher body weight, larger waist size, and higher triglycerides. This suggests that gut health plays a role in metabolic health beyond just calories.

Use of regional anesthesia (local, spinal, or epidural) reduces adverse respiratory outcomes compared to general anesthesia in OSA patients undergoing peripheral surgery.

Ask your surgeon and anesthesiologist if regional anesthesia (numbing the specific area) is an option for your surgery. It is often safer for patients with sleep apnea because it avoids putting a tube in your windpipe and reduces breathing risks.

Avoiding the supine position and using regional analgesia reduces the risk of respiratory depression and airway obstruction in postoperative OSA patients.

After surgery, try to sleep on your side or with your head elevated. Avoid lying flat on your back. Also, ask for non-opioid pain relief (like NSAIDs or nerve blocks) if possible, as opioids can slow your breathing.

Antioxidants counteract oxidative stress and promote healthy longevity by interrupting free radical propagation and inhibiting their formation, thereby reducing molecular and cellular damage associated with aging.

Focus on maintaining a healthy redox balance through natural antioxidant sources and endogenous defense systems rather than relying solely on high-dose supplements. The paper highlights that antioxidants help scavenge ROS and reduce oxidative stress, which is linked to healthy longevity and reduced risk of age-related diseases.

Senolytic drugs (e.g., Dasatinib + Quercetin) reduce senescent cell burden and improve healthspan parameters in aged, radiation-exposed, and progeroid mice, though clinical use is limited by side effects like neutropenia.

Senolytic drugs like Dasatinib and Quercetin show promise in animal models for improving healthspan and reducing senescent cells. However, human application is currently limited by side effects like blood cell count reduction. This is an emerging field, not yet a standard recommendation for healthy individuals.

SASP modulation (senomorphics) offers an alternative to senolytics by targeting the secretome rather than killing cells, with potential benefits for wound healing and fibrosis where cell clearance might be harmful.

Instead of killing senescent cells, some therapies aim to reduce their harmful secretions (SASP). Drugs like Metformin and Rapamycin may have these effects, but their benefits are not solely due to SASP modulation. This approach may be safer in contexts where some senescent cells are needed for healing.