Browse the evidence

Early-life maternal nutrient restriction (caloric or protein) programs skeletal muscle structure and metabolism, leading to reduced fiber number, altered fiber type composition, and increased susceptibility to metabolic disease and sarcopenia in later life.

Your early life environment may have set a baseline for your muscle fiber number and metabolic flexibility. While you cannot change your birth history, being aware of this 'programming' can help you prioritize metabolic health (glucose control, protein intake) to counteract potential predispositions to insulin resistance or muscle loss as you age.

Maternal obesity or high-fat diets during gestation program offspring skeletal muscle to exhibit blunted insulin signaling, increased inflammation (TNF-alpha), and reduced myogenesis, predisposing them to insulin resistance and obesity.

Maternal health during pregnancy significantly impacts the child's future metabolic risk. Maintaining a healthy weight and diet during pregnancy is crucial for preventing early programming of insulin resistance.

Sarcopenia predicts significantly worse long-term overall survival (1, 3, and 5 years) and disease-free survival following abdominal surgery for malignancy.

For cancer patients undergoing abdominal surgery, muscle mass is a key prognostic factor. If your scans show sarcopenia, engage in prehabilitation focusing on resistance training and protein intake to potentially improve your long-term survival and disease-free outcomes.

Nutrients-to-limit reformulation of ultra-processed foods fails to improve health outcomes because it enables mal-substitution of ingredients and legitimizes continued high consumption of ultra-processed products.

Do not rely on 'reformulated' or 'low-fat/low-sugar' labels to judge the healthiness of packaged foods. These products are often still ultra-processed and may contain other harmful additives or substitutes. Focus on consuming minimally processed foods instead of trying to optimize the nutrient profile of industrial products.

In patients with Obstructive Sleep Apnea (OSA), the uvula exhibits significantly greater skeletal muscle mass and fat content compared to normal subjects, contributing to pharyngeal narrowing.

For individuals with OSA, structural changes in the throat, specifically an enlarged and fatty uvula, contribute to airway blockage. This suggests that treatments targeting airway structure, such as surgical removal of excess tissue (UPPP), may be effective because they address these specific anatomical abnormalities.

Non-Hispanic Black and Mexican-American women exhibit significantly lower cardiovascular health (CVH) scores compared to Non-Hispanic White women, with these disparities persisting unchanged from 1999 to 2012.

For Non-Hispanic Black and Mexican-American women, cardiovascular health scores remain significantly lower than those of Non-Hispanic White women. This gap has not closed between 1999 and 2012. Focus on the 7 key metrics: diet, physical activity, smoking, BMI, blood pressure, blood glucose, and cholesterol. Culturally competent prevention strategies are essential to address these persistent gaps.

Relocating from Latin America to the USA during early life (before age 18) causes a persistent reduction in the Prevotella to Bacteroides ratio and lower fungal alpha diversity, whereas late-life relocation (after age 45) is associated with high bacterial and fungal diversity and high Prevotella to Bacteroides ratios.

If you moved to the US from Latin America as a child, your microbiome likely adapted to a Western diet early on, resulting in lower fungal diversity and a lower P:B ratio. If you moved as an adult, your microbiome may retain more features of your country of origin (higher diversity, higher P:B ratio). To improve your microbiome, focus on dietary acculturation: increasing fiber, whole grains, and vegetables while reducing red meat and trans fats can help shift your microbiome toward a healthier profile, regardless of when you moved.

Mitochondrial dysfunction and elevated ROS production drive lipid peroxidation, which contributes to biological aging and age-related diseases.

Focus on maintaining mitochondrial health through lifestyle factors that support energy metabolism and reduce oxidative stress, as these are key drivers of aging and age-related diseases.

Obesity is associated with significantly lower gut microbiota diversity and distinct taxonomic shifts, including decreased Akkermansia and increased Acidaminococcus, independent of dietary intake.

Your gut bacteria differ between normal weight and obese states, with obese individuals showing less diversity and specific bacterial shifts (like lower Akkermansia). This suggests that microbiota composition is a biological factor in obesity, independent of just what you eat. While this doesn't prescribe a specific treatment, it highlights that gut health is a key area of interest in obesity research.

In vitro digestion using the INFOGEST protocol demonstrates that intact proteins from diverse sources (whey, collagen, zein, legumes, cereals) are fully hydrolyzed during the intestinal phase, although digestion-resistant peptides persist in all substrates.

When you eat protein from any source (meat, dairy, beans, grains), your digestive system breaks down the large protein structures into smaller peptides during the intestinal phase. While some resistant peptides remain, the large intact proteins are gone. This suggests that digestive capability is not the primary limiting factor for plant vs. animal protein absorption in a healthy gut.

For individuals consuming a balanced diet, calcium and vitamin D supplementation provides little to no beneficial or detrimental effect on fracture prevention.

If you eat a balanced diet and are not on osteoporosis medication, you likely do not need calcium or vitamin D supplements for fracture prevention. Focus on getting these nutrients from food. If you are on medication or have a deficiency, your doctor may recommend specific doses.

Advancing age is not associated with increased self-reported sleep disturbance or daytime tiredness; instead, these complaints generally decline across the life span, with the lowest prevalence in individuals older than 80 years.

If you are over 60 and struggling with sleep or fatigue, do not assume it is 'just aging.' This study of over 150,000 Americans shows that the oldest adults (80+) actually report the lowest levels of sleep disturbance and tiredness. Your symptoms are likely driven by modifiable factors like general health status or mood, not your age itself. Addressing underlying health issues or mood disorders may resolve sleep complaints more effectively than accepting them as a natural part of aging.

Endoscopic gastric plication (pose procedure) produces statistically significant but clinically modest weight loss (mean 4.95% TBWL) compared to sham, failing to meet pre-specified superiority margins, while demonstrating a manageable safety profile with transient adverse events.

This procedure involves placing sutures inside the stomach to reduce its capacity. It is a single, minimally invasive procedure followed by basic lifestyle counseling. While the average weight loss is modest (around 5% of body weight), it is statistically better than a sham procedure and can significantly improve conditions like diabetes and high blood pressure. It is an option for those with Class I or II obesity who want more than lifestyle changes but are not candidates for or willing to undergo traditional surgery. Most side effects like pain and nausea resolve within a week.

Epigenetic modifications, particularly DNA methylation patterns, serve as accurate biomarkers of biological age and are influenced by both genetic background and lifestyle.

Use epigenetic testing to monitor your biological age. This can help you assess the effectiveness of your lifestyle interventions and track your progress in extending healthspan.

HIV infection causes a state of malnutrition characterized by weight loss, micronutrient deficiencies, and altered metabolism, which accelerates disease progression and increases mortality risk independently of CD4 count.

For individuals with HIV, maintaining adequate nutrition is not just supportive care but a critical component of disease management. Weight loss and micronutrient deficiencies are common and directly linked to faster disease progression and higher mortality, independent of standard immune markers like CD4 counts. Addressing food insecurity, managing side effects that reduce appetite, and ensuring a balanced diet are essential steps to mitigate these risks.

Cellular senescence drives inflammaging through the secretion of the Senescence-Associated Secretory Phenotype (SASP), which promotes chronic sterile inflammation and age-related pathologies.

Aging is associated with the accumulation of 'zombie' cells (senescent cells) that secrete inflammatory signals (SASP). This chronic inflammation contributes to many age-related diseases. While senolytics (drugs that kill these cells) are being developed, current evidence supports lifestyle factors like physical activity, which improves mitochondrial function and may help manage inflammation.

Mitochondrial dysfunction, specifically the release of mitochondrial DAMPs (mtDAMPs) like oxidized mtDNA and cardiolipin, activates innate immune pathways (NLRP3, cGAS/STING, NF-κB) to drive inflammaging.

Mitochondrial health is crucial for managing inflammation. Impaired mitochondria release signals that trigger chronic inflammation. Physical activity improves mitochondrial function and may help reduce this inflammatory burden.

Higher Neighborhood Socioeconomic Status (NSES) is associated with lower BMI, lower obesity rates, and lower Systolic and Diastolic Blood Pressure in postmenopausal women.

Living in a more affluent neighborhood is linked to significantly lower BMI and blood pressure. This is likely due to better access to healthy food, safer environments for walking, and lower stress levels, highlighting the importance of neighborhood quality for health.

Prolonged sitting in specific contexts (TV-viewing or occupational sitting) does not show a significant association with all-cause or cardiometabolic mortality in the short term (3.3 years), unlike total sitting time.

Don't panic about watching TV or sitting at work specifically. Focus on reducing your total hours of sitting throughout the entire day.

Maintaining a body weight 10% below usual increases skeletal muscle work efficiency and shifts fuel utilization toward fatty acids at low exercise intensities (10-25 W) by decreasing glycolytic enzyme activity (PFK) relative to oxidative capacity, without changing mitochondrial density or fiber type.

When you lose weight, your body becomes more efficient at moving, especially during light activities like walking or slow cycling. This means you burn fewer calories for the same amount of light activity than you did before. To maintain your new weight, you may need to be mindful of your diet and ensure you are getting enough physical activity, as your body's 'default' efficiency has increased to conserve energy.

Isocaloric substitution of fructose for other carbohydrates does not adversely affect blood pressure in humans, specifically showing no significant effect on systolic blood pressure.

If you replace other carbohydrates with an equivalent amount of calories from fructose, your blood pressure is unlikely to change. The concern about fructose raising blood pressure is not supported by isocaloric controlled feeding trials.

In older men, sarcopenia defined by the EWGSOP criteria (low muscle mass combined with low muscle strength or poor physical performance) is an independent predictor of all-cause mortality, whereas in older women, these same criteria do not significantly predict mortality.

For older men, maintaining muscle mass, strength, and physical performance is critical for longevity. The risk of death increases significantly if you have sarcopenia, defined as low muscle mass combined with weak legs or poor physical performance. Older women in this study did not show the same mortality link, but maintaining muscle is still recommended for function. Focus on resistance training and physical activity to preserve muscle strength and performance.

Aging is associated with a decline in adaptive immunity and a concurrent up-regulation of innate immunity, resulting in chronic inflammation.

As you age, your immune system changes: specific defenses weaken while general inflammation increases. This chronic inflammation is a key driver of age-related decline, suggesting that simply 'boosting' immunity without addressing inflammation may be counterproductive.

At moderate-to-high aerobic exercise intensities (65-90% VO2max), glycogenolysis is regulated by posttransformational factors (free Pi and AMP) rather than the transformation of glycogen phosphorylase, which remains in excess of flux requirements.

To burn more glycogen during cardio, you must increase your power output (intensity), not just hope your enzymes are 'activated.' At moderate intensities, your body uses post-transformational signals (like AMP and Pi levels) to fine-tune exactly how much glycogen to break down, keeping the enzyme ready but not necessarily running at max capacity.