Browse the evidence

High-intensity lifestyle interventions are associated with a modest, statistically non-significant reduction in all-cause mortality (OR 0.86), though the point estimate suggests a potential benefit.

While high-intensity lifestyle interventions may reduce mortality, the evidence is not yet statistically definitive due to low death rates in trials. However, the observed 14% reduction is promising and aligns with other long-term health data.

A remotely delivered, 12-month GLP-1RA (semaglutide) supported weight management program achieves significant weight loss (mean 19.1% of starting weight) in participants who maintain an active subscription, but high withdrawal rates (60.4%) limit generalizability.

If you have obesity and are considering a GLP-1RA like semaglutide, a remote program can help you lose significant weight (around 19% on average) if you stick with it. However, be aware that many people drop out, often due to side effects or cost. To succeed, you need to be committed to the weekly injections and the digital support, and understand that stopping the medication likely leads to weight regain.

Polyglucosamine supplementation (800-1700 mg/day) combined with caloric restriction and physical activity produces a statistically significant, albeit modest, reduction in body weight (-1.78 kg) and BMI (-1.52 kg/m2) compared to lifestyle interventions alone in overweight and obese adults.

If you are overweight, taking polyglucosamine (approx 1-1.7g daily, split into doses with meals) alongside a calorie-restricted diet and moderate exercise will help you lose slightly more weight (about 1.8 kg more) than diet and exercise alone over 3-12 months. It is not a magic solution, but a small booster.

Virtual weight care programs prescribing a broad range of antiobesity medications alongside behavior change achieve clinically significant weight loss (mean 8.0% at 12 months) in real-world settings, with higher engagement correlating with greater weight loss.

Engage with a structured virtual weight care program that combines medication with behavioral support. Higher engagement with the program (logging weight weekly, interacting with coaches) correlates with greater weight loss (up to 12%). You do not need the most expensive medications to achieve significant results; a broad range of medications, when paired with consistent engagement, can lead to clinically meaningful weight loss.

Tirzepatide produces significantly greater long-term total body weight loss and fat mass reduction compared to Semaglutide in real-world clinical practice, with effects becoming distinct after 6 months.

If you are choosing between Semaglutide and Tirzepatide for long-term weight management, Tirzepatide offers significantly greater weight loss after 12 months. To maximize results and protect your muscle, you must combine the medication with a program that includes strength training twice a week and a protein intake of 60-90 grams daily.

Females experience significantly greater weight loss than males when treated with incretin-based obesity medications (Semaglutide and Tirzepatide).

If you are male, expect that your weight loss may be slower than that of female peers taking the same medication. This is a known biological response. Do not be discouraged; the medication still provides significant metabolic benefits and fat loss, even if the scale moves slower.

Low-carbohydrate diets (5-25% energy from carbohydrate) improve cardiometabolic markers (weight, HDL, triglycerides) in healthy adults over 12 weeks, with greater carbohydrate restriction yielding larger improvements in HDL and triglycerides.

Adopting a low-carbohydrate diet (5-25% of calories from carbs) for 12 weeks can improve your weight, waist size, and key blood markers like HDL and triglycerides, even if you don't change your total calorie intake. While stricter diets (5% carbs) yield the best blood marker improvements, moderate restriction (15-25% carbs) is easier to stick to and still provides significant health benefits.

Orlistat treatment for 3 months in women with PCOS produces a statistically significant reduction in body weight and serum testosterone levels, with weight loss effects being greater than those observed with metformin.

If you have PCOS and are looking to lose weight and lower testosterone, Orlistat (120mg, 3x daily) may be more effective for weight loss than Metformin over a short 3-month period, while still effectively lowering testosterone. Ensure you follow the dietary changes recommended during the initial 8-week period to maximize results and minimize side effects.

High intake of total trans fatty acids, particularly industrially produced trans fats, is associated with increased risk of all-cause mortality, coronary heart disease (CHD) mortality, and total CHD.

Avoid industrially produced trans fats (found in partially hydrogenated oils) as they increase the risk of heart disease and death. Ruminant trans fats (from natural sources like dairy and meat) do not show the same harmful effects and may even have some benefits. Focus on avoiding industrial trans fats rather than demonizing all fats.

High supplemental intake of vitamin D (≥800 IU/day) and calcium (≥1,200 mg/day) is associated with a significantly lower risk of developing type 2 diabetes in women, with the combined high intake reducing risk by 33% compared to low intake.

For women looking to potentially lower their risk of type 2 diabetes, aiming for high intakes of Vitamin D and Calcium via supplements may be beneficial. Specifically, targeting at least 800 IU of Vitamin D and 1,200 mg of Calcium daily was associated with a 33% lower risk in this study. Note that this benefit was observed with supplements, not just dietary sources, and the study focused on women.

Supplemental Vitamin D intake (≥400 IU/day) is associated with a lower risk of type 2 diabetes, whereas total or dietary Vitamin D intake is not significantly associated after adjusting for other dietary factors.

If you are a woman, taking a Vitamin D supplement providing at least 400 IU daily may be associated with a modestly lower risk of type 2 diabetes compared to not taking such supplements. However, simply eating Vitamin D-rich foods may not provide the same protective association in this study.

High supplemental Calcium intake (≥500 mg/day) is associated with a lower risk of type 2 diabetes, whereas dietary Calcium intake is not significantly associated after multivariate adjustment.

If you are a woman, taking a Calcium supplement providing at least 500 mg daily may be associated with a modestly lower risk of type 2 diabetes compared to not taking such supplements. However, simply eating Calcium-rich foods may not provide the same protective association in this study.

High protein diets may facilitate short-term weight and fat loss compared to lower protein diets, but long-term data are limited and findings are not consistent.

High protein diets can help with short-term weight loss, but the evidence is not consistent for long-term results. Focus on sustainable dietary patterns rather than just protein intake.

Dietary phytoestrogens (specifically isoflavones from soy and lignans from flax) may confer health benefits for cardiovascular disease, cancer, osteoporosis, and menopausal symptoms through both estrogen-receptor-dependent and independent mechanisms.

Incorporate soy (tofu, tempeh, soy milk) and flaxseed into your diet. While clinical results on cholesterol vary, the mechanistic and epidemiological evidence suggests these foods may support heart health and hormonal balance, especially for postmenopausal women. Note that individual gut bacteria determine how effectively you process these compounds.

Soy protein containing phytoestrogens may lower LDL cholesterol and improve lipid profiles in hypercholesterolemic individuals, primarily through up-regulation of LDL receptors.

If you have high cholesterol, adding soy protein to your diet may help lower LDL levels, though results vary. It is not a magic bullet, but a supportive dietary strategy.

Consumption of high-glycemic index (GI) meals induces rapid glucose absorption, leading to hyperinsulinemia and suppressed glucagon, which lowers circulating metabolic fuels (glucose and fatty acids) and triggers compensatory overeating in obese subjects.

For obese individuals, choosing high-glycemic foods (like instant oatmeal or white bread) over low-glycemic options (like steel-cut oats or legumes) can trigger a hormonal response that lowers blood fuel levels and increases hunger, leading to significantly higher calorie consumption later in the day, even if the initial meal size is the same. Prioritize food structure and glycemic index to manage appetite.

The weight loss benefit of reducing sugar-sweetened beverages is significantly greater in Hispanic adolescents than in non-Hispanic adolescents, suggesting ethnic-specific physiological or behavioral responses.

Hispanic adolescents may benefit more significantly from reducing sugary drinks than non-Hispanic adolescents. This suggests that personalized nutrition strategies might be more effective than generic guidelines.

Soluble fiber has a stronger inverse association with coronary mortality than insoluble fiber.

While all fiber is good for your heart, soluble fiber (found in oats, barley, beans, and fruits) may offer stronger protection against heart-related death than insoluble fiber (found in whole wheat and vegetables). This is likely because soluble fiber slows nutrient absorption and binds bile acids. However, since you don't need to perfectly separate these fibers, simply prioritizing whole grains and fruits will naturally increase your intake of both, with a beneficial emphasis on soluble fiber.

Omega-3 PUFA supplementation reduces total mortality and cardiovascular-related hospitalizations in patients with chronic heart failure with reduced ejection fraction.

If you have heart failure with a weak heart pump (reduced ejection fraction), taking fish oil supplements may help you live longer and avoid hospitalizations. It is a reasonable addition to your treatment plan. Ask your doctor if it's right for you.

Local environmental changes, such as improving walkability, access to recreation spaces, and traffic safety, effectively increase physical activity.

Support local initiatives to build parks, improve sidewalks, and enhance traffic safety. These environmental changes make physical activity easier and more accessible.

Intermittent energy restriction (IER) and time-restricted feeding (TRF) improve health indicators and counteract disease processes by shifting metabolism to fat oxidation and ketone production, while stimulating adaptive cellular stress responses that repair molecular damage.

Try limiting your daily eating window to 4-6 hours (e.g., 12 PM to 6 PM) or fast for 16 hours a day. You can also try eating normally 5 days a week and restricting calories to ~500 on 2 non-consecutive days. Focus on nutrient-dense foods during your eating window. This pattern mimics evolutionary fasting states, shifting your body to burn fat and ketones, which may improve insulin sensitivity and reduce inflammation.

Biased visual cues of portion size (e.g., self-refilling bowls) significantly increase food intake volume without altering perceived satiation or consumption estimates.

Use smaller plates and bowls to create accurate visual cues of portion size. When a bowl is self-refilling or large, you are likely to overeat without feeling fuller, as your brain relies on the visual cue of an empty container rather than internal satiety signals.

Adults with diabetes and those at high risk for developing type 2 diabetes exhibit significantly lower rates of regular physical activity compared to the general adult population, with activity levels declining as the number of risk factors increases.

If you have diabetes or risk factors like obesity or high blood pressure, you are statistically less likely to be active than the average person. This isn't just about willpower; physical limitations and depression are major barriers. Focus on finding activity that accommodates your physical limits rather than aiming for intense workouts, as even modest activity is beneficial and often underutilized in this group.

Intensive, multicomponent behavioral weight loss interventions produce statistically significant, albeit modest, weight loss (-2.4 kg) and reduce the incidence of type 2 diabetes in adults with overweight or obesity, without increasing serious adverse events.

Engage in a structured behavioral program focusing on diet and physical activity. While the average weight loss is modest (around 5 lbs), the program significantly lowers your risk of developing type 2 diabetes. Consistency over 12-36 months is key, and serious side effects are not a concern with this approach.