Browse the evidence

Obesity exacerbates COVID-19 severity through metabolic and immune mechanisms, specifically by upregulating ACE2 receptors, promoting a 'cytokine storm' via adipokines (leptin, IL-6), and causing immune system attenuation.

Obesity isn't just about weight; it creates a state of chronic inflammation and immune dysregulation. This makes your body more likely to overreact to the virus (cytokine storm) and less able to fight it effectively. Managing metabolic health (blood sugar, blood pressure) is crucial for reducing this internal inflammatory burden.

High body iron stores (indicated by high serum ferritin) are positively correlated with an increased risk of developing Type 2 Diabetes and insulin resistance, likely due to oxidative stress.

If you have high ferritin levels, discuss with your doctor whether reducing iron intake or therapeutic phlebotomy might help lower your diabetes risk. High iron stores can contribute to oxidative stress and insulin resistance, so managing iron levels is a valid strategy for metabolic health.

Roux-en-Y gastric bypass (RYGBP) surgery significantly increases postprandial secretion of active GLP-1 and total PYY in morbidly obese subjects, which is associated with decreased hunger and increased satiety.

For patients undergoing Roux-en-Y gastric bypass, the surgery triggers a significant increase in satiety hormones (GLP-1 and PYY) after eating, which directly reduces hunger and increases feelings of fullness. This hormonal shift is a key driver of weight loss, distinct from simple stomach size reduction.

Overtraining Syndrome (OTS) is a multifactorial condition characterized by prolonged performance decline and maladaptation of biological, neurochemical, and hormonal regulation mechanisms, resulting from an imbalance between training load and recovery.

If you are an athlete experiencing prolonged performance decline despite rest, consult a specialist to rule out organic diseases. Do not assume it is just 'laziness' or 'lack of effort.' The condition is complex and involves hormonal and psychological factors. Recovery requires addressing the root causes, which may include nutrition, sleep, and stress, not just reducing training load.

Specific probiotic strains (Lactobacillus and Bifidobacterium) can reduce body weight gain and fat accumulation in animal models of obesity, though effects are strain-specific and not universal.

If you are considering probiotics for weight management, look for specific strains like Lactobacillus casei Shirota, L. gasseri, L. rhamnosus, or L. plantarum, as well as Bifidobacterium infantis, longum, and breve. However, do not expect all probiotics to work, as some strains have shown no effect or even increased weight gain in studies.

Prebiotics (e.g., oligofructose, inulin) can improve metabolic phenotypes, reduce triglycerides, and increase satiety hormones (GLP-1, PYY) in animal models, potentially aiding weight control.

If you are considering probiotics for weight management, look for specific strains like Lactobacillus casei Shirota, L. gasseri, L. rhamnosus, or L. plantarum, as well as Bifidobacterium infantis, longum, and breve. However, do not expect all probiotics to work, as some strains have shown no effect or even increased weight gain in studies.

Gut dysbiosis, characterized by a decrease in beneficial commensals (e.g., Akkermansia muciniphila) and short-chain fatty acids (SCFAs) and an increase in pro-inflammatory microbes, triggers systemic inflammation (inflammaging) and gut leakiness, which are primary drivers of aging-associated morbidities and premature death in the elderly.

Focus on maintaining a diverse and healthy gut microbiome through diet and lifestyle choices, as this appears to be a key factor in healthy aging and longevity. This includes consuming fiber-rich foods to support beneficial bacteria and SCFA production, and potentially avoiding unnecessary antibiotics. While individual results may vary, the evidence suggests that gut health is a critical lever for mitigating age-related decline.

Intensive glycaemic control reduces the risk of non-fatal myocardial infarction and microvascular complications (retinopathy, composite microvascular outcomes), but the evidence is currently insufficient to confirm these benefits definitively.

While tighter blood sugar control may slightly reduce the risk of heart attacks and eye/kidney damage, current evidence is not strong enough to guarantee these benefits. The risk of dangerous low blood sugar events remains a significant concern.

Adiponectin improves insulin sensitivity in skeletal muscle and liver by activating AMPK and PPAR-alpha pathways, leading to increased fatty acid oxidation and reduced hepatic glucose production.

While you cannot directly 'take' adiponectin as a simple supplement due to its complex structure and short half-life, the paper highlights that improving your metabolic health (e.g., through exercise and weight management) naturally optimizes your body's own adiponectin signaling. This signaling is crucial for how your muscles and liver handle energy, suggesting that lifestyle interventions that boost endogenous adiponectin are the most viable path to improving insulin sensitivity.

Adiponectin is not a viable direct therapeutic drug due to its high physiological concentration requirements, multiple oligomeric forms, and short half-life, but small-molecule activators like AdipoRon show promise.

You cannot currently take adiponectin as a drug. However, research into small molecules that activate its receptors (like AdipoRon) is promising. For now, focusing on lifestyle factors that naturally support healthy adiponectin levels and receptor sensitivity is the most practical approach.

Pharmacological agents such as thiazolidinediones, metformin, and statins can directly modify adipose tissue secretion to reduce inflammation and improve metabolic markers.

Certain diabetes and cholesterol medications can help your fat tissue function better by reducing harmful inflammatory signals. However, weight loss remains the primary treatment.

Obesity and metabolic syndrome worsen the clinical outcomes of HCC, including higher rates of microvascular invasion, tumor recurrence, and mortality, potentially mediated by adipokines like leptin promoting angiogenesis.

If you have HCC and are obese or diabetic, your risk of the cancer coming back or spreading is higher. This is partly due to biological factors like increased blood vessel growth in tumors. Managing your metabolic health is part of your cancer care plan.

Increased caloric intake in non-obese individuals does not replicate the excessive cholesterol secretion seen in obesity.

Eating a lot of calories doesn't automatically make your bile supersaturated if you are not obese. The defect is specific to the obese state, suggesting that body composition, not just current food intake, drives the risk.

Short telomere length in peripheral blood mononuclear cells (PBMC) serves as a robust biomarker for cumulative oxidative stress and predicts increased mortality risk from cardiovascular and infectious diseases in individuals aged 60 and older.

Your white blood cell telomere length reflects your body's cumulative history of oxidative stress and cellular aging. While not a guaranteed predictor of specific disease for every individual, significantly shorter telomeres in this population are statistically linked to higher mortality from heart and infectious diseases. Focus on reducing oxidative stress through lifestyle factors, as telomere length is responsive to stress levels.

Telomere-dependent cellular senescence contributes to tissue-specific functional attenuation in aging tissues, such as immunosenescence, cardiovascular disease, and muscle aging.

Aging tissues lose function partly because stem cells run out of division capacity due to telomere shortening. This is a key factor in immune decline and tissue repair issues, though it is not the sole cause of aging.

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.

Obesogenic endocrine disruptors are lipophilic and bioaccumulate in fat tissue, creating a 'vicious spiral' where increased body fat leads to greater retention of these chemicals, which in turn promotes further fat storage.

Be aware that obesity can trap environmental toxins in your fat, which may then fuel further fat storage. Gradual weight loss is preferable to rapid dieting, as it allows your body time to metabolize and eliminate stored chemicals. Reducing exposure to plastics and personal care products can help break this cycle.

Six days of high-fructose overfeeding induces hepatic and adipose tissue insulin resistance and hypertriglyceridemia in healthy men, despite maintaining normal whole-body insulin sensitivity.

Eating large amounts of fructose (e.g., via sugary drinks or high-fructose foods) on top of your normal diet can rapidly impair how your liver and fat tissue respond to insulin, even if your overall blood sugar control looks normal. This happens quickly (within days) and may contribute to metabolic issues over time, regardless of your current weight or fitness level.

Chronic stress contributes to the accumulation of visceral fat tissue primarily through the hyperactivation of the hypothalamic-pituitary-adrenal (HPA) axis and subsequent glucocorticoid exposure.

Chronic stress is not just a mental state; it physically drives visceral fat accumulation via the HPA axis. Managing stress is a critical component of metabolic health and weight management, alongside diet and exercise.

Obesity acts as a chronic stressful state that can cause HPA axis dysfunction, creating a bidirectional relationship with stress.

Obesity is not just a storage issue; it creates a biological stress state that disrupts hormonal balance. Breaking this cycle requires addressing both the metabolic load and the stress response.

Visceral obesity potentiates local glucocorticoid action through the enzyme 11β-HSD1, which converts inactive cortisone to active cortisol, thereby increasing tissue sensitivity to glucocorticoids.

Visceral fat contains enzymes that amplify cortisol's effects locally. Reducing visceral fat can lower this amplification, improving metabolic health.

Habitual cocoa intake (median ~2.11 g/day, highest tertile ~4.18 g/day) is inversely associated with systolic and diastolic blood pressure and significantly reduces 15-year cardiovascular and all-cause mortality in elderly men.

For elderly men without chronic heart or metabolic diseases, habitual consumption of small amounts of cocoa (approx. 2-4 grams of cocoa solids daily, roughly 10g of dark chocolate) is associated with lower blood pressure and significantly reduced risk of cardiovascular death over 15 years. This benefit appears specific to cocoa and is not seen with other sugary snacks like plain sugar confectionery.

The N363S polymorphism is associated with increased glucocorticoid sensitivity, higher BMI, and increased insulin response to dexamethasone, though associations with BMI are controversial across different populations.

If you carry the N363S variant, your body is more sensitive to cortisol, which may contribute to higher BMI and insulin response. Monitor your stress levels and metabolic health, as your biology may predispose you to weight gain and insulin resistance compared to non-carriers.

The BclI polymorphism (G allele) is associated with increased glucocorticoid sensitivity, abdominal obesity in middle-aged subjects, and lower BMI/lean mass in the elderly.

If you carry the BclI G-allele, your body is more sensitive to cortisol. In middle age, focus on managing abdominal fat. In old age, prioritize preserving lean muscle mass, as your sensitivity may contribute to muscle atrophy. Regular resistance training and stress management are key.