Browse the evidence

Haploinsufficiency of the SIM1 gene causes severe early-onset obesity by disrupting the development of hypothalamic nuclei (specifically the PVN) that regulate energy balance and food intake.

This paper identifies a specific genetic cause for severe obesity. For patients with early-onset, profound obesity and normal metabolic rates, genetic testing for SIM1 mutations or translocations may be warranted. Standard lifestyle interventions may be insufficient due to the biological drive for intake; medical management targeting the melanocortin pathway may be necessary.

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.

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.

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.

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.

The inverse association between flavonol intake and CVD risk is significant in women but not observed in men in subgroup analyses.

While flavonols are beneficial for everyone, this specific analysis highlights a stronger statistical link to CVD risk reduction in women. Women may derive particular cardiovascular benefit from flavonol-rich diets.

Activation of the kynurenine pathway via IDO/TDO enzymes during inflammation promotes immune tolerance and prevents hyperinflammation by depleting tryptophan and producing kynurenine, which activates the aryl hydrocarbon receptor (AhR) to drive regulatory T cell differentiation.

This paper highlights that the body's natural response to stress (inflammation) involves shifting tryptophan metabolism to protect against excessive immune damage. While not a direct supplement protocol, it suggests that maintaining healthy tryptophan metabolism and understanding the balance of immune response is crucial for aging. Future therapies might target this pathway, but currently, no specific dose is recommended for general use.

Sirtuins (SIRTs) are potential therapeutic targets for NAFLD treatment, with SIRT1 playing a key role in regulating lipid metabolism and autophagy.

Sirtuins are being studied as potential drug targets for NAFLD, but no specific sirtuin-activating supplements or drugs are currently recommended for treatment.

Maternal 1-hour glucose levels during pregnancy are specifically associated with an increased risk of childhood prehypertension or hypertension, independent of other glucose measures.

If a mother has a high 1-hour glucose level during her pregnancy, her child may be at a higher risk for high blood pressure in childhood. This highlights the importance of monitoring blood pressure in children born to mothers with elevated 1-hour glucose levels, even if their fasting glucose was normal.

Strawberry polyphenols (specifically anthocyanins and flavanols) inhibit the progression of precancerous esophageal lesions and reduce risk of head/neck cancer through NF-kB suppression.

If you have precancerous esophageal lesions, incorporating 60g of freeze-dried strawberry powder daily for 6 months may help inhibit lesion progression by suppressing key inflammatory pathways like NF-kB. Consult your doctor for a personalized plan.

Exposure to environmental endocrine-disrupting chemicals (EDCs) such as BPA, phthalates, and persistent organic pollutants acts as an obesogen, contributing to obesity, metabolic syndrome, and type 2 diabetes by disrupting endocrine pathways, adipogenesis, and gut microbiota.

Reduce exposure to known endocrine disruptors by avoiding heating food in plastic containers, choosing glass or stainless steel for water storage, and filtering drinking water. Be aware that these chemicals are ubiquitous in plastics, pesticides, and personal care products, and early-life exposure may have long-term metabolic consequences.

Exposure to environmental endocrine-disrupting chemicals (EDCs) is associated with adverse reproductive health outcomes in both males and females, including reduced fertility, altered puberty timing, and increased risk of conditions like PCOS and endometriosis.

Minimize exposure to EDCs by avoiding plastic food containers, especially when heating food, and choosing personal care products free of phthalates and parabens. This is particularly important for those planning pregnancy or currently pregnant.