Browse the evidence

A high Western dietary pattern score combined with low physical activity or obesity (BMI > 30 kg/m2) is associated with a particularly high risk of type 2 diabetes, significantly higher than either factor alone.

If you are obese or have low physical activity, your risk of type 2 diabetes is drastically amplified if you also eat a Western diet. To minimize this risk, you must address both your dietary pattern (reducing processed meats, refined grains, and sweets) and your lifestyle (increasing physical activity and managing weight). The combination of these factors yields the highest risk, so addressing all is critical.

Central body obesity (excess fat above the hips) is a stronger risk factor for developing type 2 diabetes than fat stored in the hips and thighs.

Where you carry your weight matters for diabetes risk. If you carry excess fat around your midsection (central obesity), your risk for type 2 diabetes is higher than if you carry it in your hips and thighs.

An inactive lifestyle contributes to the development of type 2 diabetes, independent of or alongside obesity.

Sedentary behavior increases your risk of type 2 diabetes. Incorporating regular physical activity into your routine is essential for prevention, even if you are not overweight.

Weight loss achieved via a very-low-carbohydrate, high-saturated-fat diet does not impair endothelial function (measured by flow-mediated dilatation) and improves other cardiovascular risk markers, refuting the hypothesis that such diets inherently damage vascular health.

If you are overweight and have abdominal obesity, losing weight through a very-low-carbohydrate, high-saturated-fat diet does not appear to harm your blood vessel health (endothelial function) over an 8-week period. In fact, other markers of inflammation and clotting risk improved. The key factor seems to be the weight loss itself, which may counteract the negative effects of high saturated fat intake seen in people who don't lose weight.

Intentional weight loss of >5 pounds in patients with intermittent claudication reduces the annual decline in walking distance, independent of muscle loss.

If you have PAD and are overweight, aim to lose more than 5 pounds. This specific amount of weight loss has been shown to help you walk further for longer, even if you lose some leg muscle in the process. Combine this with exercise for best results.

Low-carbohydrate/high-fat diets (e.g., Atkins) primarily result in weight loss through caloric restriction and water loss, not superior metabolic advantages, and may increase long-term mortality risk if animal proteins and fats are used.

If you choose a low-carb diet, be aware that weight loss is likely due to eating fewer calories and losing water weight, not magic metabolism. Also, be cautious of long-term risks associated with high animal protein/fat intake.

Amateur bodybuilders in the pre-contest period experience significantly increased oxidative stress, inflammation, and upper respiratory tract infection severity due to severe caloric restriction and macronutrient deficits.

If you are cutting calories drastically for a competition, expect your immune system and recovery to suffer. This study shows that severe energy restriction (45% deficit) combined with high training volume leads to increased oxidative stress and inflammation, even if you eat enough protein. To mitigate this, ensure you are getting enough micronutrients (especially Vitamins A and E) and healthy fats, as their deficiency was linked to higher oxidative damage. Be aware that using anabolic steroids, common in this population, may mask some symptoms but does not eliminate the underlying oxidative stress.

Organized sports contribute disproportionately to moderate-to-vigorous energy expenditure (MVEE) compared to total daily energy expenditure (TDEE) in adolescents.

If your goal is to increase the intensity of your child's physical activity, organized sports are highly effective, contributing over a third of their moderate-to-vigorous energy expenditure. However, do not rely on sport alone for total calorie burn.

Substituting 30 minutes of brisk walking for 30 minutes of jogging/running results in weight gain (1.57 kg over 6 years), whereas substituting brisk walking for TV watching or slow walking results in weight loss, demonstrating that the health benefit of an activity depends entirely on what it displaces.

Do not assume that swapping your run for a walk will maintain your weight loss. If you are replacing vigorous exercise with moderate walking, you will likely gain weight. Walking is most effective for weight management when it replaces sedentary behaviors like watching TV, not when it replaces higher-intensity workouts.

Energy restriction induces metabolic adaptations (adaptive thermogenesis, increased mitochondrial efficiency, and hormonal shifts) that reduce total daily energy expenditure beyond what is predicted by body mass loss, thereby attenuating further weight loss and promoting weight regain.

When dieting, expect your metabolism to slow down more than just the loss of weight would predict. This is your body trying to conserve energy. To manage this, use small caloric deficits rather than extreme ones, and consider strategies like periodic refeeding to temporarily boost hormones like leptin, though these are not guaranteed fixes.

Persistent energy imbalance triggers metabolic adaptation (adaptive thermogenesis), causing energy expenditure to deviate disproportionately from predictions based on changes in body composition.

When you lose weight, your body burns fewer calories than expected for your new size. This is a normal survival response called metabolic adaptation. To counter this, focus on preserving muscle mass through resistance training and consider a slower, more gradual weight loss approach to minimize the metabolic drop.

Sustainable, high-quality weight loss requires combining appetite suppression with moderate increases in energy expenditure and preservation of lean mass, rather than focusing solely on absolute weight reduction.

To lose weight sustainably, do not just focus on eating less. Prioritize strategies that protect your muscle mass (like resistance training and adequate protein) and support your metabolism. Modern treatments should ideally combine appetite control with mechanisms that prevent metabolic slowdown. The goal is to lose fat while keeping your lean tissue, which helps you maintain the weight loss long-term.

Intermittent fasting (IF) regimens improve body composition and cardiometabolic risk factors compared to unrestricted eating, primarily through energy deficit, but do not provide additional benefits over continuous daily caloric restriction when energy balance is matched.

Intermittent fasting works for weight loss and heart health because it helps you eat fewer calories, not because of some magic metabolic switch. If you eat the same amount of calories as someone who eats continuously, you won't get extra benefits from fasting. Use IF if it helps you stick to your calorie goals more easily.

Obesity (BMI ≥30 kg/m2) is associated with an increased risk of incident atherosclerotic cardiovascular disease (ACVD).

Maintain a healthy body weight (BMI < 25 kg/m2) to reduce your risk of heart disease and stroke. Obesity is a significant independent risk factor, so managing your weight through diet and physical activity is crucial for long-term cardiovascular health.

The magnitude of systolic blood pressure reduction with GLP-1 RAs is directly associated with changes in body weight, BMI, and HbA1c, suggesting these metabolic improvements drive the BP benefit.

The blood pressure lowering effect of GLP-1s like semaglutide is largely driven by the weight loss and metabolic improvements (lower A1c/BMI) they cause, rather than a direct effect on blood vessels alone.

Non-beverage energy density and hyper-palatability (high sodium/fat or sodium/carb combinations) in ultra-processed foods positively predict meal energy intake and drive excess consumption.

Be aware that ultra-processed foods are engineered to be hyper-palatable and have high energy density (excluding beverages). This combination drives you to eat more without you necessarily feeling fuller. Choose foods with lower energy density and less engineered hyper-palatability.

Higher BMI is positively correlated with Diabetic Kidney Disease (DKD) and carotid atherosclerotic plaque, with the highest risk observed in the highest BMI quintile.

For Type 2 Diabetes patients, keeping BMI in a moderate range (23.5–25.2) is crucial for protecting kidney health. While being too thin increases nerve damage risk, being overweight (highest BMI quintile) significantly increases the risk of kidney disease and carotid plaque. Weight management should aim for this moderate zone to protect the kidneys.

In overweight or obese diabetic patients, higher initial BMI (specifically >35 kg/m2 and >40 kg/m2) is associated with a dose-dependent increase in all-cause mortality.

If your BMI is above 35 or 40, your risk of death from any cause is higher than those with a BMI of 25-30. While the 'obesity paradox' exists, it does not protect against the risks of extreme obesity. Focus on managing diabetes and cardiovascular health rather than just weight.

Sustained high levels of physical activity expenditure trigger compensatory metabolic adaptations that decrease resting metabolic rate (RMR), thereby constraining total energy expenditure and facilitating long-term weight loss maintenance.

If you are maintaining significant weight loss through high levels of exercise, expect your resting metabolism to drop as a compensatory mechanism. This is not a sign that your exercise is ineffective; rather, it is a physiological adaptation that helps you keep the weight off. Do not interpret a plateau in weight loss despite high activity as a failure of your regimen, but as evidence of metabolic adaptation constraining total energy expenditure.

Lifestyle modification, specifically caloric restriction and specific diets (e.g., Mediterranean, low-carbohydrate), reduces body weight and improves insulin resistance and hepatic steatosis, but its efficacy is moderate and less sustainable than GLP-1RA.

Losing just 5% of your body weight through caloric restriction can significantly improve insulin sensitivity and reduce liver fat by up to 40%. While lifestyle changes are the foundation of treatment, they often result in moderate weight loss compared to medications like GLP-1RA. Combining caloric reduction with exercise is effective, but maintaining this long-term is challenging, which is why pharmacological support is often needed for significant, sustained results.

Lifestyle interventions (diet and physical activity) improve cardiometabolic risk through mechanisms independent of weight loss, primarily by reducing visceral and ectopic fat and improving metabolic markers.

Do not focus on the scale. Focus on improving diet quality and increasing physical activity. These actions will reduce visceral fat and improve metabolic markers (blood pressure, lipids, glucose) even if your total weight doesn't change much. This is the most effective way to reduce cardiovascular risk.

A ketogenic diet tends to cause greater losses in body weight, fat mass, and fat-free mass compared to higher-carbohydrate diets, likely due to differences in calorie and protein intake and fluid shifts rather than the diet itself being inherently superior for fat loss.

If you want to lose fat, a ketogenic diet can help you lose weight, but it is not inherently better than other diets. The greater weight loss seen is likely due to eating fewer calories and losing water weight. Ensure you are consuming enough protein to preserve muscle mass, regardless of the diet you choose.

Gut microbiota composition determines individual variability in postprandial glycemic responses to standardized meals, enabling prediction of glucose spikes via machine learning models trained on metagenomic data.

Your gut bacteria uniquely determine how your blood sugar reacts to food. This is why one person might spike after a meal while another doesn't. Personalized nutrition strategies based on your microbiome can help manage glucose levels more effectively than generic advice.

Whole-room indirect calorimetry provides highly reliable measurements of daily energy expenditure components (sleep, 24-hour, basal, and resting EE) with intraclass correlation coefficients exceeding 90%, and this reliability is maintained even after significant weight loss.

If you are designing a study on weight loss or metabolic adaptation, whole-room indirect calorimetry is a highly reliable tool for measuring energy expenditure. To maximize efficiency and reduce the number of participants needed, use at least two days of measurement in the calorimeter rather than one, as this significantly improves the precision of detecting changes in energy expenditure.