Browse the evidence

Visceral adipose tissue volume, rather than total body fat or subcutaneous fat, is the primary driver of insulin resistance and the metabolic syndrome through the flux of free fatty acids and TNF-alpha to the liver and peripheral tissues.

Focus on reducing visceral fat through lifestyle changes (diet and exercise) rather than just chasing a specific BMI number. Visceral fat is the key driver of insulin resistance, and reducing it improves metabolic health even if total body weight doesn't change drastically.

Acute administration of glucocorticoids (prednisolone or cortisol) increases brown adipose tissue (BAT) activity, thermogenesis, and UCP-1 expression in humans, whereas chronic glucocorticoid exposure suppresses BAT activation.

While chronic steroid use is linked to obesity and suppressed brown fat, acute exposure to glucocorticoids (like prednisolone) actually boosts brown fat activity and heat production in lean humans during cold exposure. This suggests a complex, time-dependent relationship where short-term stress hormones might temporarily enhance metabolic rate via brown fat, but long-term excess leads to suppression and weight gain.

LCHF diets improve cardiovascular risk profiles by lowering triglycerides, increasing HDL cholesterol, and reducing small dense LDL particles, even if total LDL cholesterol increases in some individuals.

Monitor your full lipid panel, not just LDL. If your LDL rises, check your triglycerides and HDL. LCHF diets typically lower triglycerides and raise HDL, and shift LDL particles to a less harmful size, which may indicate improved heart health despite a higher LDL number.

Metformin treatment (1-2 g/day) improves hyperandrogenism, hyperinsulinemia, and menstrual cyclicity in nonobese women with PCOS primarily by increasing hepatic insulin clearance and reducing abdominal adiposity, without significantly altering whole-body insulin sensitivity.

For nonobese women with PCOS, metformin (1-2g/day) can effectively lower testosterone and improve menstrual cycles by helping the liver clear insulin faster, rather than by changing how muscles use glucose. This suggests that even without weight loss or improved muscle sensitivity, hormonal balance can be restored.

Genetic polymorphisms in circadian clock genes (specifically PER2, PER3, NPAS2, and CLOCK) interact with shift work environment to influence sleep duration, caffeine consumption, and adaptation levels.

Your ability to adapt to night shifts may be influenced by your genetics, specifically variations in clock genes like PER2, PER3, and NPAS2. While you cannot change your genes, understanding that your genetic makeup might make you more susceptible to sleep issues or caffeine dependence on nights shifts can help you proactively manage your sleep hygiene and caffeine intake.

Soy isoflavone supplementation improves insulin sensitivity and reduces fasting insulin levels in postmenopausal women, particularly those with metabolic syndrome or hyperinsulinemia.

Postmenopausal women, especially those with metabolic syndrome, may benefit from soy isoflavone supplementation (around 54mg/day) to improve insulin sensitivity and lower fasting insulin levels.

While exercise improves insulin sensitivity regardless of diet, the enhancement of basal fat oxidation specifically requires the addition of caloric restriction to exercise training in older, obese adults.

If your goal is to improve your body's ability to burn fat at rest (basal fat oxidation), exercise alone may not be enough. You likely need to combine your aerobic exercise routine with a moderate caloric deficit (reducing daily intake by at least 500 calories) to see these specific metabolic shifts.

Exercise training improves leptin sensitivity in older, obese adults, evidenced by a new correlation between circulating leptin and basal fat oxidation that does not exist in the sedentary state.

This finding is primarily mechanistic. It suggests that exercise helps 'reset' how your body uses the hormone leptin to manage fat burning. While you don't need to track leptin levels, this explains why exercise is so effective for metabolic health in this population.

Circadian misalignment (desynchrony between sleep/eating times and internal clocks) independently reduces insulin sensitivity and exacerbates the negative metabolic effects of sleep restriction.

Align your sleep and meal times with your natural circadian rhythm. Circadian misalignment (e.g., eating late, sleeping at odd hours) reduces insulin sensitivity and worsens glucose metabolism. For shift workers, strategies to align internal clocks with external schedules are critical to mitigate diabetes risk.

Consumption of probiotic yoghurt containing specific strains (L. acidophilus La5 and B. lactis Bb12) improves glycemic control (fasting blood sugar, HbA1c) and lipid profiles in patients with Type 2 Diabetes.

If you have Type 2 Diabetes, incorporating 300g of probiotic yoghurt daily (specifically with L. acidophilus La5 and B. lactis Bb12) may help lower blood sugar and cholesterol levels. Consult your doctor before making dietary changes.

Oat beta-glucan lowers cholesterol by modulating gut microbiota to increase bile salt hydrolase (BSH) activity, which deconjugates bile acids, reduces their reabsorption, and forces the liver to synthesize new bile acids from cholesterol.

Your gut bacteria play a key role in how oat beta-glucan lowers cholesterol. By feeding specific bacteria that produce bile salt hydrolase, oat beta-glucan helps your body excrete more cholesterol. This happens naturally when you eat oats regularly.

Prolonged continuous stimulation of the GLP-1 receptor causes tachyphylaxis (attenuation) of gastric emptying slowing, whereas intermittent stimulation maintains this effect, leading to superior postprandial glycemic control with short-acting agonists compared to long-acting ones.

If you are using a GLP-1 agonist (like Ozempic or Trulicity) and struggle with high blood sugar after meals, it might be because your body has adapted to the constant drug levels, reducing its ability to slow down digestion. Switching to a short-acting version (like Saxenda or Byetta) taken before meals might restore this natural slowing effect and better control post-meal spikes, though it requires more frequent dosing.

Extending the nightly fasting interval to 13 or more hours is associated with a significantly lower risk of breast cancer recurrence in women with early-stage breast cancer compared to fasting less than 13 hours.

If you have had early-stage breast cancer, try to extend the time between your last meal of the day and your first meal the next morning to at least 13 hours. For example, finish dinner by 7 PM and don't eat breakfast until 8 AM. This simple timing strategy is associated with a lower risk of cancer returning, likely because it helps regulate blood sugar and improves sleep.

Higher TSH levels within the normal (euthyroid) range are associated with increased odds of prevalent metabolic syndrome, primarily driven by higher triglycerides and lower HDL cholesterol.

If you are in the older adult demographic and have metabolic syndrome risk factors, check your TSH even if it falls within the standard 'normal' lab range. Higher TSH within that normal window is linked to worse lipid profiles (high triglycerides, low HDL). This suggests that thyroid health extends beyond just treating overt hypothyroidism.

Insufficient sleep and circadian misalignment act as novel, modifiable risk factors for obesity by altering hunger hormones (ghrelin, 2-AG), increasing hedonic food appeal, and reducing energy expenditure.

Prioritize 7-9 hours of sleep as a primary weight management strategy, not just a luxury. If you are struggling with weight loss, evaluate your sleep duration and consistency first, as sleep loss biologically increases hunger hormones and cravings for high-calorie foods.

Sleep restriction increases the appeal of sweet/dessert foods and activates the endocannabinoid system (2-AG), driving hedonic food intake and obesity risk.

If you are sleep-deprived, you are biologically wired to crave sweets. Recognize this as a hormonal response, not a lack of willpower, and plan your snacks accordingly.

In postmenopausal women, high percentage body fat and waist circumference are associated with lower bone mineral density and increased risk of vertebral fractures, whereas higher body weight is associated with higher bone mineral density.

For postmenopausal women, maintaining a healthy body weight is important for bone strength, but carrying excess body fat, particularly around the waist, increases the risk of bone loss and fractures. Focus on body composition rather than just total weight.

Diet-induced obesity promotes tumor growth and progression in breast and prostate cancer models, whereas calorie restriction (CR) slows tumor growth and increases tumor latency.

Maintaining a healthy weight and avoiding adult weight gain are critical for reducing the risk of aggressive cancer and improving survival outcomes. While weight loss is challenging, even modest weight loss (e.g., 10%) can positively impact biomarkers associated with breast cancer. Focus on sustainable lifestyle changes rather than rapid weight loss.

Consumption of extra-virgin olive oil (EVOO) as part of a Mediterranean diet reduces systolic and diastolic blood pressure in individuals with high cardiovascular risk.

Replace other fats with extra-virgin olive oil in your daily cooking and dressings. Aim for 10-50 mL per day as part of a Mediterranean-style diet. Do not rely on olive oil capsules, as they do not offer the same cardiovascular benefits.

Higher TyG-BMI values are positively and linearly associated with increased risk of cardiovascular disease in individuals with Cardiovascular-Kidney-Metabolic (CKM) syndrome stages 0-3.

If you have metabolic risk factors or early kidney/heart issues, monitoring your Triglyceride-Glucose BMI (TyG-BMI) is a valuable tool for predicting heart disease risk. This index combines your body mass with blood sugar and fat levels to assess insulin resistance. Keeping this index low through lifestyle management (diet and exercise) is critical for preventing cardiovascular events, especially if you are over 45.

Exercise training reduces serum leptin levels in older women, but this reduction is driven by the loss of fat mass rather than an independent effect of exercise or hormone replacement therapy.

If you are an older woman exercising to lose fat, expect your leptin levels to drop. This is a normal and expected result of losing fat mass, not a negative side effect of the exercise itself. Hormone replacement therapy does not appear to alter this outcome.

Local thyroid hormone activation in skeletal muscle via D2 drives a shift from slow-twitch (Type I) to fast-twitch (Type II) fibers, increasing energy expenditure and influencing insulin sensitivity.

Skeletal muscle uses local thyroid hormone activation to adjust its metabolic profile. Higher local T3 levels promote fast-twitch fibers and increase energy expenditure through heat production and glucose uptake. This suggests that muscle-specific thyroid regulation plays a key role in metabolic flexibility and insulin sensitivity.

In older obese postmenopausal women, higher visceral adipose tissue (VAT) levels are independently associated with lower glucose disposal (insulin resistance), whereas total fat mass and subcutaneous adipose tissue are not significant predictors.

For older obese women, simply losing total weight may not be enough to improve insulin sensitivity if visceral fat remains high. Focus on strategies that specifically target abdominal/visceral fat, as this tissue type is the primary driver of insulin resistance in this demographic, independent of total body fat or muscle fitness levels.

Higher baseline PFAS levels (specifically PFOS and PFNA) are associated with a greater decline in Resting Metabolic Rate (RMR) during the initial weight loss phase and a blunted increase in RMR during the weight regain phase.

This finding explains why some people struggle to keep weight off despite eating less: their metabolism doesn't 'bounce back' as it should. High levels of environmental chemicals (PFAS) may blunt this metabolic recovery. To counteract this, prioritize resistance training to build metabolically active tissue, as this may help override the blunted RMR response caused by environmental factors.