Browse the evidence

Chronic partial sleep restriction (less than 7 hours per night) increases the risk of type 2 diabetes by inducing insulin resistance and impairing glucose tolerance through hormonal and neural mechanisms.

Prioritize getting 7 or more hours of sleep per night. This is not just about feeling rested; it is a critical metabolic lever. Short sleep directly impairs your body's ability to process glucose and manage insulin, significantly increasing your risk for type 2 diabetes and obesity, independent of diet and exercise.

Sleep loss increases the risk of obesity by dysregulating appetite hormones (decreasing leptin, increasing ghrelin) and increasing orexin-driven hunger, leading to higher caloric intake.

If you are sleeping less than 7 hours, your body is biologically wired to want more food. This is driven by lower leptin (satiety hormone) and higher ghrelin (hunger hormone). Recognize this as a biological signal, not a personal failure, and plan your nutrition accordingly.

Long-term pharmacotherapy with orlistat, sibutramine, or rimonabant produces modest but statistically significant weight loss (2.9–4.7 kg) compared to placebo in adults with obesity, while improving specific cardiovascular risk factors.

Long-term use of FDA-approved anti-obesity medications (orlistat, sibutramine, rimonabant) leads to modest but real weight loss (approx. 3-5 kg more than placebo) when combined with lifestyle changes. While effective, these drugs carry specific side effect profiles (GI issues for orlistat, cardiovascular changes for sibutramine, mood disorders for rimonabant) that require monitoring and can lead to high discontinuation rates.

Orlistat improves cardiovascular risk factors, including reducing the incidence of type 2 diabetes and improving lipid profiles, despite causing gastrointestinal side effects.

Orlistat not only aids weight loss but also significantly reduces the risk of developing type 2 diabetes in obese individuals with impaired glucose tolerance. It also improves cholesterol and blood pressure. However, users must manage gastrointestinal side effects, which are common but not necessarily dangerous.

Sibutramine and rimonabant produce greater weight loss than orlistat but carry distinct adverse effect profiles: sibutramine increases blood pressure and heart rate, while rimonabant increases the risk of mood disorders.

Sibutramine and rimonabant are more effective for weight loss than orlistat but have distinct risks. Sibutramine can raise blood pressure and heart rate, requiring monitoring. Rimonabant can increase the risk of mood disorders, requiring careful psychiatric screening. These risks must be weighed against the greater weight loss benefits.

Quercetin aglycone supplementation at doses of 500 mg or higher significantly reduces blood pressure in individuals with stage 1 hypertension, whereas it has no significant effect on normotensive or pre-hypertensive individuals.

If you have Stage 1 hypertension, taking 500 mg or more of quercetin aglycone daily may help lower your blood pressure by a few mmHg. However, if your blood pressure is already normal, this supplement is unlikely to provide cardiovascular benefits. Consult your doctor before starting, especially if you are on medication.

Creatine supplementation has potential therapeutic benefits in various clinical populations, including neurodegenerative diseases, creatine synthesis deficiencies, and brain/spinal cord injury.

For specific medical conditions like creatine synthesis deficiencies, high-dose creatine may be beneficial under medical supervision. For general health, 3g/day may offer long-term benefits.

Higher time spent in sedentary behavior is associated with increased risk of all-cause mortality, cardiovascular disease (CVD) morbidity, and CVD mortality in adults, independent of moderate-to-vigorous physical activity (MVPA).

Minimize prolonged sitting. Break up long periods of sitting with light activity or standing. While meeting physical activity guidelines is essential, reducing total sedentary time offers additional cardiovascular protection.

High sedentary behavior is associated with an increased risk of developing type 2 diabetes mellitus, independent of demographic factors and adiposity indices, although BMI partially mediates this effect.

Reduce time spent watching TV and sitting. Each additional 2 hours of daily TV viewing increases diabetes risk by 20%. Replacing sitting with standing or walking around the home can reduce this risk.

Oncology clinicians should adopt the 'Assess, Advise, Refer' (EIM) framework to standardize exercise referrals, as current referral rates are low despite high patient interest.

Clinicians: Make exercise a vital sign. Ask about activity, advise on its importance, and refer to a program using the EIM tools. This is a low-time, high-impact step.

High-intensity aerobic exercise (e.g., 80% VO2max) is required to significantly reduce LDL cholesterol and triglycerides in sedentary individuals, whereas moderate-intensity exercise primarily increases HDL cholesterol.

If your goal is to lower LDL cholesterol and triglycerides, you likely need to exercise at a higher intensity (around 80% of your max capacity) rather than just walking. Ensure you are doing enough total work (e.g., 400 calories per session, 3 times a week). If you are currently sedentary, start with moderate intensity to build a base, then gradually increase the intensity to target LDL.

SSB consumption increases the risk of type 2 diabetes (T2DM) and cardiovascular disease (CVD) independently of, and mediated by, weight gain.

Even if you are not overweight, limiting SSBs is important for preventing type 2 diabetes and heart disease. The sugars in these drinks can negatively affect your metabolism, insulin response, and blood lipids independently of your weight.

Obesity is primarily driven by an 'obesogenic' environment characterized by energy-dense, processed foods and reduced physical activity demands, rather than individual lack of willpower.

Stop blaming yourself for the obesity epidemic. Your environment is designed to make you gain weight through cheap, processed food and sedentary living. Focus on systemic changes like urban planning and food policy rather than just 'trying harder' to exercise or diet.

Asian and Hispanic populations have a higher risk of type 2 diabetes and hypertension at lower BMIs compared to Caucasians.

If you are Asian or Hispanic, your risk for diabetes and heart disease starts at a lower weight than the standard 'obese' BMI. Aim for a lower BMI (around 21-23) and monitor waist circumference, not just the scale.

Excessive intake of carbohydrates (especially mono and disaccharides) combined with positive energy balance disrupts palmitic acid homeostasis, leading to increased tissue PA, dyslipidemia, and inflammation via Toll-like receptor 4.

If you eat too many calories and sugars, your body will convert the excess sugar into fat (palmitic acid) in your liver, even if you don't eat much saturated fat. This leads to inflammation and metabolic issues. To avoid this, focus on energy balance and reducing simple sugars, not just cutting saturated fat.

Inulin-type fructans enhance the absorption of calcium and magnesium, with oligofructose-enriched inulin being the most effective product.

Include foods like chicory root (inulin/oligofructose), onions, garlic, and bananas in your diet to support calcium and magnesium absorption. Look for products enriched with oligofructose for potentially better results.

Inulin-type fructans reduce blood triglyceride levels, particularly in individuals with hypertriglyceridemia.

If you have high triglycerides, incorporating inulin-type fructans into your diet may help lower them. It is not a primary treatment for high cholesterol.

Brazil nuts are an exceptionally high but highly variable source of selenium that may also deliver toxic levels of barium and radium, posing health risks if consumed regularly as a primary selenium source.

If you eat Brazil nuts for selenium, limit your intake. A few nuts can provide enough selenium but may also deliver toxic levels of barium and radioactive radium. Do not rely on them as your sole source of selenium; rotate with other foods like seafood or meat, which have more predictable selenium levels and fewer toxic co-contaminants.

Selenium supplementation can reduce the risk of specific cancers (prostate, colorectal, lung) and improve immune function and cognitive health, but the benefits are highly dependent on baseline selenium status and the form of selenium used.

If you are considering selenium supplements for cancer prevention or immune support, get your selenium status tested first. If you are deficient, supplementation (100-200 mcg/day) may offer benefits, particularly for prostate and colorectal cancer risk. If you are already sufficient, the benefits are less clear, and you may be exposing yourself to unnecessary risks. Consult a healthcare provider to determine if supplementation is right for you.

High dietary fiber intake is associated with reduced mortality from infectious and respiratory diseases, likely mediated by gut microbiota fermentation into anti-inflammatory short-chain fatty acids.

Aim to increase your daily dietary fiber intake by 10 grams. This simple change is associated with a significant reduction in mortality from infectious and respiratory diseases. Focus on plant-based sources like vegetables, fruits, nuts, seeds, and whole grains.

Sleep durations outside the 7-8 hour range (short <6 hours or long >=9 hours) are associated with increased risks of cardiovascular disease, diabetes, depression, accidents, and mortality, with specific demographic and health factors driving these deviations.

Aim for 7 hours of sleep as a baseline, but recognize that this is not a rigid rule. If you are pregnant, have a chronic condition, or are under high stress, your body may need more or less sleep. Focus on sleep quality and consistency rather than hitting an arbitrary number. If you consistently struggle with sleep, look at external factors like work hours, stress, and health conditions before assuming it is a personal failing.

A low-calorie diet (800 kcal) induces a transient 25% decrease in adipose PPAR-gamma2 mRNA expression during weight loss, which rebounds to pre-weight-loss levels during weight maintenance.

When you lose weight with a very low-calorie diet, your body's fat-storing signals (PPAR-gamma2) drop, but they bounce back to pre-weight-loss levels once you stop losing weight, even if you maintain the new weight. This molecular rebound may contribute to the difficulty of keeping weight off, suggesting that long-term maintenance strategies need to account for this biological drive.

Testosterone replacement therapy (200 mg i.m. every 2 weeks) improves insulin sensitivity, glycemic control, and reduces visceral adiposity in hypogonadal men with type 2 diabetes.

If you are a man with type 2 diabetes and low testosterone, testosterone replacement therapy (specifically 200mg injections every two weeks) can significantly improve your body's ability to use insulin, lower your blood sugar levels, and reduce belly fat. This may help you manage your diabetes better and potentially reduce your need for insulin, without negatively affecting your blood pressure. Always consult your doctor to determine if you are hypogonadal and if this therapy is safe for you.

Bariatric surgery significantly reduces the long-term incidence of type 2 diabetes in obese patients compared to usual care, with an adjusted hazard ratio of 0.17.

For severely obese individuals at high risk of diabetes, bariatric surgery is a highly effective preventive measure, far superior to lifestyle changes alone. While surgery carries small short-term risks, the long-term reduction in diabetes risk is substantial and sustained.