Browse the evidence

Mechanical load is sensed by specific proteins including filamin-C, BAG3, titin, and costameres (integrins, FAK), which transduce force into hypertrophic signaling via mTORC1 and Hippo pathway activation.

This node describes the internal biological machinery of muscle growth. For the average exerciser, understanding that specific proteins sense force reinforces the importance of progressive overload and mechanical tension. While you cannot directly control these proteins, ensuring your training provides adequate mechanical stress (via load and volume) is the way to engage these sensors.

Short-chain fatty acids (SCFA) produced by gut microbiota from flavonoid and fiber fermentation influence energy metabolism, glucose-insulin homeostasis, and inflammatory pathways, with effects mediated by G-protein-coupled receptors (GPR).

Support your gut microbiota with fiber and flavonoid-rich foods to promote the production of short-chain fatty acids (SCFA). These byproducts help regulate blood sugar, energy expenditure, and inflammation.

Adolescent consumption of sugar-sweetened beverages (SSBs) is associated with an increased risk of early-onset colorectal cancer (EO-CRC) later in life.

For parents and adolescents, reducing SSB consumption during teenage years may help lower the risk of early-onset colorectal cancer in adulthood. Encouraging healthier beverage alternatives like water, milk, or coffee can be beneficial.

Obesity impairs the efficacy of influenza vaccination, resulting in a higher incidence of influenza-like illness despite vaccination, suggesting similar immune evasion may occur with other vaccines.

Obesity can reduce how well your flu shot works, making you twice as likely to get sick compared to non-obese vaccinated people. Still get vaccinated, but be aware you may need extra precautions or discuss high-dose options with your doctor.

Training to volitional failure, contraction velocity, set configuration, inter-set rest, periodization, time of day, and exercise order do not significantly influence skeletal muscle hypertrophy.

You do not need to obsess over training to failure, specific tempos, exercise order, or rest periods to build muscle. These variables have little to no impact on hypertrophy compared to the main drivers: load, frequency, and volume. Choose what is sustainable for you.

Excessive dietary intake of linoleic acid (LA) leads to the formation of oxidized linoleic acid metabolites (OXLAMs) and alters cardiolipin composition, causing mitochondrial dysfunction and contributing to chronic diseases such as cardiovascular disease, cancer, and Alzheimer's.

Reduce intake of seed oils (soybean, corn, canola, sunflower) to lower linoleic acid consumption. This may help reduce the production of harmful metabolites linked to chronic disease, though the process is slow due to LA's long half-life.

High dietary linoleic acid intake inhibits the conversion of short-chain omega-3 fatty acids (ALA) to long-chain omega-3 fatty acids (EPA/DHA) by inhibiting delta-desaturase enzyme activity.

If you consume high amounts of seed oils, your body's ability to convert plant-based omega-3s (ALA) into active forms (EPA/DHA) is reduced. Consider direct sources of EPA/DHA if you are not consuming fish.

Time-restricted eating (TRE) with a 9-hour window (10:00-19:00) does not significantly improve glycaemic control (HbA1c) or reduce body mass in individuals with Type 2 Diabetes compared to habitual eating patterns.

If you have Type 2 Diabetes, simply shifting your eating window to 9 hours (e.g., 10am-7pm) without changing *what* or *how much* you eat will not significantly improve your blood sugar levels or help you lose weight. TRE may be feasible to adhere to, but it is not an effective standalone metabolic intervention for T2D unless it leads to reduced caloric intake.

Greater dietary diversity (variety of foods) is associated with suboptimal eating patterns, higher energy intake, and increased risk of weight gain and obesity in adult populations.

Stop trying to eat a wide variety of foods as a strategy for weight loss. Instead, focus on eating a healthy pattern that emphasizes plant foods, protein, low-fat dairy, and limits sweets and processed foods. Variety in the context of a modern food environment often leads to consuming more calories and less healthy options.

Obesity prevalence has increased significantly in the US since 1980 despite a plateau or decline in national energy intake and stable or increasing physical activity levels since 2000.

Focus on the quality and processing of your food rather than just counting calories. Prioritize minimally processed foods with intact cellular structures (fiber, phytonutrients) and avoid highly processed 'acellular' nutrients. This supports a healthy gut microbiome and metabolic function, which may help regulate body weight more effectively than caloric restriction alone.

Under conditions of oxidative stress, glucose is prioritized for the Pentose Phosphate Pathway (PPP) to generate NADPH for antioxidant defense, whereas glycolysis is suppressed.

When your body is under significant stress (like intense exercise or illness), glucose is used to protect your cells from damage rather than just for energy. This highlights the importance of maintaining adequate glucose availability during high-stress periods.

Chronic carbohydrate overload combined with a sedentary lifestyle causes redox dysregulation, contributing to metabolic syndrome and type 2 diabetes.

If you are sedentary, eating large amounts of carbohydrates can disrupt your body's antioxidant balance and increase the risk of metabolic syndrome. Reducing carbohydrate intake or increasing physical activity may help mitigate this risk.

Gene-based and microbiome-based personalized nutrition recommendations currently lack sufficient scientific evidence to improve weight loss outcomes compared to standard dietary counseling.

Do not pay for commercial genetic or microbiome tests to guide your weight loss diet. Current evidence shows they do not improve weight loss outcomes compared to standard dietary advice. Focus on creating a caloric deficit instead.

Oral administration of 30 mg deuterated creatine (D3-creatine) allows for the estimation of total body skeletal muscle mass via urine D3-creatinine enrichment, providing estimates that correlate strongly with MRI but exhibit high intraindividual variability compared to MRI or DXA.

This study validates a method to measure muscle mass using a specific labeled creatine tracer and urine analysis. It is not a supplement regimen for building muscle, but a diagnostic tool. For now, it remains a research method due to cost and complexity, though it aims to eventually replace expensive imaging like MRI for tracking muscle wasting in clinical settings.

Soy protein intake does not significantly impact total cholesterol, LDL cholesterol, or triglycerides in individuals with familial hypercholesterolemia.

Increasing soy protein intake is not an effective strategy for lowering cholesterol in patients with Familial Hypercholesterolemia. The evidence shows no significant benefit for LDL or triglycerides compared to standard diets.

Mitochondria-targeted antioxidants (e.g., MitoQ, SkQ1) and polyphenols (e.g., Resveratrol) can extend lifespan and improve health in animal models by reducing ROS damage and mimicking caloric restriction effects, but human clinical efficacy is unproven and dosage is critical.

While mitochondria-targeted antioxidants and polyphenols show promise in animals, human evidence is mixed. Do not rely on supplements to replace exercise or healthy eating. If considering supplements like Resveratrol or MitoQ, be aware of poor bioavailability and lack of proven lifespan benefits in humans. Focus on whole-food sources of polyphenols.

Obesity (BMI ≥ 30 kg/m2) is associated with approximately 20% greater greenhouse gas (GHG) emissions compared to a normal-weight state (BMI < 25 kg/m2), contributing an estimated 700 megatons of CO2 equivalent annually globally.

Obesity contributes significantly to global greenhouse gas emissions (approx. 1.6% globally) through increased metabolism, food production, and transportation needs. Addressing obesity is not just a health priority but an environmental one. However, this information should never be used to stigmatize individuals; obesity is driven by powerful environmental factors, and solutions require systemic policy changes rather than individual blame.

Genetic variability in the GLP1R gene can lead to non-response to GLP-1 receptor agonists in some patients with T2DM and obesity.

Some patients with T2DM and obesity do not respond well to GLP-1 receptor agonists due to genetic factors. If you are not seeing results, genetic variability in the GLP-1 receptor might be a cause. Discuss this with your healthcare provider to explore other treatment options or lifestyle interventions.

A decrease in the dietary protein fraction (dilution by carbs/fat) triggers compensatory energy intake via protein leverage, potentially explaining a significant portion of the US obesity epidemic.

Ensure your diet has a sufficient proportion of protein relative to total calories. If you are eating a diet high in carbs and fats, you may need to eat more total food to get enough protein, which can lead to weight gain. Prioritize protein density to avoid this compensatory overeating.

GLP-1 receptor agonists delay gastric emptying and increase the risk of pulmonary aspiration during general anesthesia, necessitating specific peri-operative management strategies.

If you take a GLP-1 drug (like Ozempic, Wegovy, or Trulicity) and have surgery, tell your anesthesiologist. You likely need to stop the drug for a specific time before surgery (often 3 half-lives, e.g., 1 week for weekly drugs) to prevent stomach contents from entering your lungs while asleep. Do not assume standard fasting rules apply; your stomach may still be full even if you haven't eaten for 12 hours.

Evidence that behavioral weight management programs reduce the incidence of cardiovascular disease or type 2 diabetes is currently sparse and uncertain.

While BWMPs improve risk factors, do not expect them to definitively prevent heart disease or diabetes based on current evidence. The data is too sparse to draw firm conclusions about disease incidence reduction.

Semaglutide improves insulin sensitivity and glucose uptake in skeletal muscle and adipose tissue by activating the PI3K/AKT and AMPK/SIRT1 pathways, leading to GLUT4 translocation, independent of direct insulin action in some contexts.

Semaglutide helps your body use insulin better by activating specific cellular pathways (AMPK/SIRT1) that move glucose into muscles and fat cells. This reduces insulin resistance, a key factor in type 2 diabetes and obesity.

The obesity epidemic is primarily driven by an obesogenic environment—specifically the increased availability of highly processed, calorie-dense foods and reduced occupational physical activity—acting on genetically susceptible individuals, rather than by genetics alone.

Focus on modifying your environment rather than relying solely on willpower. Reduce access to highly processed, calorie-dense foods and increase incidental physical activity (e.g., walking, standing) to counteract the sedentary nature of modern work and food availability.

Secondary environmental factors—including poor sleep hygiene, decreased cigarette smoking, increased atmospheric CO2, thermoneutrality, screen time, endocrine-disrupting chemicals, medications, and an unhealthy microbiome—contribute to the obesity epidemic by tipping the energy balance equation.

Consider secondary factors like sleep quality and exposure to endocrine disruptors. While food and activity are primary, improving sleep hygiene and reducing unnecessary medication/chemical exposure may support weight management.