Browse the evidence

Dietary intake of medium-chain fatty acids (MCFAs) from sources like virgin coconut oil can increase the Bacteroidetes/Firmicutes ratio and reduce obesity and inflammatory bowel disease (IBD) in animal models, although high-concentration coconut oil diets may have the opposite effect.

Focus on the quality of fats rather than just avoiding fat. Moderate intake of medium-chain fatty acids (found in coconut oil) may support a healthy gut microbiome and reduce inflammation in animal studies, but very high intake of coconut oil might have negative effects. Balance is key.

High intake of long-chain fatty acids (LCFAs), particularly from saturated sources like palm oil and lard, increases the Firmicutes to Bacteroidetes ratio, leading to obesity, insulin resistance, and inflammatory bowel disease in animal models.

Limit high intake of saturated long-chain fatty acids (found in palm oil, lard, and large amounts of butter). These are linked to negative gut microbiota changes and metabolic issues in animal studies. Opt for unsaturated fats like olive oil (MUFAs) or fish oil (PUFAs) for better metabolic health.

Foreign direct investment (FDI) by transnational food companies into developing countries drives the nutrition transition by increasing the availability, lowering the prices, and expanding the marketing of highly processed foods, thereby increasing their consumption.

Public health policy should target foreign direct investment in the food sector as a primary lever for improving population health. Governments in developing countries should implement regulatory conditionalities on foreign food companies, such as restrictions on marketing to children and requirements for nutritional standards, to 'redirect' the nutrition transition towards healthier outcomes.

Higher gut microbial alpha diversity is associated with lower arterial stiffness (measured by carotid-femoral pulse wave velocity) in middle-aged women, independent of traditional cardiovascular risk factors.

For women, maintaining a diverse gut microbiome through a fiber-rich diet may support arterial health. While this study does not prove that changing your diet will directly lower blood pressure or stiffness, it highlights that the microbes in your gut are linked to how stiff your arteries are, a key marker of cardiovascular aging. Focus on dietary diversity to support microbial richness.

Exercise provides an anti-ageing effect by preventing telomere shortening and modifying DNA methylation patterns, which may mitigate age-related bone loss and osteoporosis.

Engage in regular exercise, especially after age 40, not just for muscle or weight, but for cellular health. This helps protect your telomeres and DNA methylation patterns, which are linked to how fast your body ages and your risk of bone diseases.

The rapid global shift from water/milk to sugar-sweetened beverages and ultra-processed foods has created an energy imbalance that human biology, evolved for scarcity and water, cannot compensate for.

Understand that your environment is designed to make you overeat. The rapid availability of cheap, calorie-dense, liquid foods exploits an evolutionary biology built for scarcity. This is not a personal failure; it is a systemic issue. Focus on changing your immediate environment (e.g., removing SSBs) to align with your biology.

Geographic origin is a stronger determinant of gut microbiota composition than BMI or gender, and the previously hypothesized increase in Firmicutes with obesity is not universal across all populations.

Do not assume that microbiota-based interventions (like probiotics or specific fiber targets) will work identically across all ethnic or geographic groups. Your geographic origin and diet history likely shape your gut bacteria more than your weight does. Personalized approaches must account for baseline microbial differences between populations.

The availability of healthy food items (fruits, vegetables, overall quality) within consumer food stores is not consistently associated with lower BMI or improved dietary patterns, and proximity to healthy stores does not necessarily lead to better health outcomes.

Don't assume that stocking healthy food in a store will automatically improve community health. Research shows that simply having healthy options available does not necessarily lead to lower BMI or better diets. To make a difference, interventions must also address price, marketing, and purchasing habits, not just availability.

Stores in low-income or high-minority neighborhoods often have less availability of healthy food and higher prices for healthy items compared to stores in higher-income neighborhoods, although these findings are inconsistent across studies.

Be aware that food environments are not equal. Low-income and minority neighborhoods often have less healthy food available and higher prices for healthy items. Addressing these disparities requires targeted interventions, not just general availability improvements.

Concurrent chemoradiation (CCR) in head and neck cancer patients induces rapid lean body mass (LBM) loss and physical functional decline, driven by an inflammatory state rather than caloric deficit.

For patients undergoing head and neck cancer treatment, standard high-calorie nutritional supplements may not prevent muscle loss because the treatment triggers an inflammatory metabolic shift. Focus on preserving muscle through targeted anti-inflammatory strategies and physical activity support, rather than just increasing caloric intake, as the body is actively catabolizing lean tissue despite adequate food consumption.

Elevated inflammatory cytokines (IL-6, IL-1b, IL-10) are strongly associated with functional decline and loss of physical activity levels in head and neck cancer patients undergoing chemoradiation.

Monitor inflammatory markers if possible, as they correlate with functional loss. Standard nutritional advice should be combined with anti-inflammatory strategies and exercise to support lean tissue, as inflammation directly drives the loss of physical independence.

Obesity induces systemic DNA damage and inhibits DNA repair mechanisms through chronic inflammation and oxidative stress, thereby increasing the risk of metabolic disorders and cancer.

Maintaining a healthy weight is critical for protecting your DNA from damage caused by inflammation and oxidative stress. This damage accumulates over time and increases the risk of serious conditions like cancer and diabetes. However, the damage is not permanent; losing weight and improving diet quality can reverse this process and restore genomic stability.

Supplements containing concentrated Chinese green tea extract (Camellia sinensis) can cause severe, symptomatic hepatotoxicity, including acute liver injury with jaundice and markedly elevated transaminases, which resolves upon discontinuation.

If you are taking a weight-loss supplement containing concentrated green tea extract (Camellia sinensis), be aware of the risk of liver injury. Symptoms include abdominal pain, nausea, jaundice (yellowing of skin/eyes), and dark urine. Stop taking the supplement immediately if these symptoms occur and seek medical attention. Do not assume 'natural' means safe, especially with concentrated extracts.

Infant formula milk contains significantly higher levels of Advanced Glycation End Products (AGEs), specifically CML, compared to breast milk, potentially predisposing infants to inflammation and metabolic issues.

If using infant formula, be aware that processing creates AGEs. Follow preparation instructions carefully to avoid excessive heating. If breastfeeding is possible, it provides lower AGE exposure. For formula-fed infants, this is a known physiological factor contributing to early inflammatory load.

The effects of Baduanjin Qigong on leg power, cardiopulmonary endurance, and pulmonary function remain unclear due to a small number of studies.

Do not rely on Baduanjin Qigong as your primary method for improving leg power, cardiovascular endurance, or lung capacity. While it may offer minor benefits, there is not enough evidence to confirm it effectively targets these specific physiological systems. For these goals, consider more targeted aerobic or resistance training.

Obesity is associated with gut dysbiosis characterized by decreased microbial diversity and an increased Firmicutes/Bacteroidetes ratio, which contributes to obesity through disrupted energy homeostasis, lipid synthesis, and chronic inflammation.

Your gut bacteria play a significant role in how your body handles energy and stores fat. While diet and exercise are crucial, the types of bacteria in your gut can influence your risk of obesity through mechanisms like energy extraction and inflammation. Maintaining gut health through a diverse diet may support metabolic health, but it is not a standalone cure for obesity.

Obesity and metabolic disorders are associated with specific alterations in gut microbiota composition, including enrichment of Proteobacteria and depletion of Faecalibacterium, Akkermansia, and Alistipes, with significant geographic variation in taxa like Prevotella and Ruminococcus.

Focus on dietary patterns that support a diverse microbiome rather than seeking specific 'obesity bacteria' supplements. The link between gut health and obesity is real but complex and varies by geography. Probiotics may have small effects, but they are not a substitute for foundational lifestyle changes.

Telomere length (TL) functions as a biomarker of somatic redundancy (the body's capacity to absorb damage) rather than a direct indicator of biological age, as evidenced by the diminishing association between TL and mortality risk as subjects age.

Do not interpret short telomeres as a fixed 'biological age' penalty. Instead, view them as a measure of your current cellular resilience (somatic redundancy). The paper suggests that as you age, the *rate* of telomere shortening becomes a more critical predictor of mortality than the absolute length itself, implying that maintaining the rate of loss may be more important than the starting length.

Women may exhibit attenuated metabolic adaptations to Sprint Interval Training (SIT) compared to men, specifically regarding improvements in insulin sensitivity, potentially due to lower muscle glycogen breakdown and lactate accumulation during sprints.

While women benefit from SIT for aerobic fitness similarly to men, they might not see the same improvements in insulin sensitivity from the same protocol. Women might need to adjust their training or monitor metabolic health markers more closely if insulin sensitivity is a primary goal.

Medical students with poor sleep quality demonstrated higher academic performance (GPA) compared to good sleepers.

High academic achievement in medical school may come at the cost of sleep. While poor sleepers had higher GPAs, they also had higher stress and anxiety. Balance is key.

Consuming seaweed carries risks of heavy metal and iodine contamination, requiring regulated sourcing and processing to ensure safety.

Be cautious when consuming seaweed due to potential heavy metal and iodine contamination. Choose products from regulated sources that adhere to safety standards and labeling requirements to minimize health risks.

Lower childhood socioeconomic position is associated with slower walking and chair rise speeds in later life, independent of adult risk factors.

Early-life environment and socioeconomic status have long-lasting effects on physical capability in old age. While you cannot change your childhood, understanding this life-course perspective highlights the importance of early interventions and the cumulative impact of lifetime factors on health.

Overweight and obese individuals exhibit a gut microbiota profile characterized by higher abundance of Collinsella aerofaciens, Dorea formicigenerans, and Dorea longicatena compared to lean individuals.

Your gut bacteria profile differs if you are overweight or obese compared to if you are lean. Specifically, higher levels of Collinsella aerofaciens, Dorea formicigenerans, and Dorea longicatena are associated with higher body weight. Understanding these differences may help tailor dietary strategies for weight management.

Lipedema is a distinct adipose tissue disorder characterized by disproportionate lower extremity fat that is resistant to caloric restriction, diet, and exercise, unlike lifestyle-induced obesity.

If you have disproportionate leg fat that does not shrink with diet or exercise, and your feet are spared, consult a specialist familiar with lipedema. Standard weight loss advice will likely fail and increase distress.