Browse the evidence

The blood pressure-lowering effect of the DASH combination diet is significantly greater in African Americans and individuals with hypertension compared to whites and normotensive individuals.

If you are African American or have high blood pressure, the DASH diet (high fruits/veggies/low-fat dairy, low saturated fat) will likely lower your blood pressure much more than it would for a white person or someone with normal blood pressure.

A multi-component school-based physical activity intervention (increasing PE lessons, adding activity breaks, and homework) significantly reduces adiposity and improves aerobic fitness in primary school children.

To improve fitness and reduce body fat in children, schools should implement a structured physical activity program that includes extra physical education lessons, daily short activity breaks during academic classes, and daily physical activity homework. This approach was shown to be effective over a school year.

A multi-component school-based physical activity intervention significantly improves cardiovascular risk scores in primary school children, regardless of their baseline body mass index.

Implementing a structured physical activity program in schools can improve cardiovascular health markers in children, even those who are not overweight.

A multi-component school-based physical activity intervention significantly increases aerobic fitness and moderate-to-vigorous physical activity in primary school children.

To improve aerobic fitness and increase daily physical activity in children, schools should implement a structured physical activity program that includes extra physical education lessons, daily short activity breaks during academic classes, and daily physical activity homework.

Unhealthy lifestyle factors, specifically high-calorie diets, saturated fats, refined carbohydrates, and sugar-sweetened beverages, are primary drivers of NAFLD development and progression.

To manage or prevent NAFLD, prioritize reducing overall calorie intake and eliminating sugar-sweetened beverages and refined carbohydrates. These dietary changes address the root metabolic drivers of liver fat accumulation.

Adherence to a Mediterranean dietary pattern significantly reduces the prevalence and incidence of metabolic syndrome and its components compared to nonadherence or Western diets.

Adopt a Mediterranean-style diet focusing on olive oil, vegetables, fruits, whole grains, and legumes. This approach is proven to cut your risk of metabolic syndrome by half compared to standard diets, regardless of whether you restrict calories.

Sarcopenia is significantly associated with a higher risk of mortality in adults, independent of population type, sarcopenia definition, or follow-up period.

If you are an adult, especially over 50, muscle loss is a serious health risk that doubles your chance of dying, regardless of whether you live at home or in a facility. You should not accept muscle loss as 'just aging.' Get screened for sarcopenia (muscle mass and strength tests) and engage in resistance training and adequate protein intake to mitigate this risk.

Lifestyle modification, specifically weight loss, dietary changes, and physical exercise, is the foundational treatment for adults with MASLD, alongside optimal management of comorbidities.

Focus on sustainable lifestyle changes: lose weight through a balanced diet and regular physical activity. Avoid alcohol. Manage other health conditions like diabetes and high blood pressure with your doctor.

Incretin-based therapies (e.g., semaglutide, tirzepatide) are advised for the optimal management of comorbidities like type 2 diabetes or obesity in adults with MASLD.

If you have type 2 diabetes or obesity, talk to your doctor about incretin-based therapies like semaglutide or tirzepatide, which can help manage these conditions and may benefit your liver.

Exercise interventions significantly reduce depressive symptoms in adults with major depressive disorder or clinically elevated depressive symptoms compared to non-active controls.

If you are struggling with depression, engaging in supervised, moderate-intensity aerobic or resistance exercise is a clinically effective treatment. You do not need to commit to long-term programs to see benefits; shorter interventions (under 16 weeks) may actually yield larger symptom reductions. Aim for group settings if possible, as these showed large effects.

Internet-delivered Cognitive Behavioral Therapy for Insomnia (iCBTI) significantly improves sleep efficiency, total sleep time, and insomnia severity compared to waitlist controls in adults.

If you have insomnia, internet-delivered CBTI is a valid, evidence-based treatment option that is as effective as seeing a therapist in person. Look for programs that include core CBTI elements like sleep restriction and stimulus control. These programs typically run for 5-9 weeks and can be self-directed or guided by a therapist via email/phone. This approach is particularly useful if you cannot access in-person specialists.

Internet-delivered CBTI leads to durable improvements in sleep efficiency and insomnia severity that are maintained for up to 48 weeks post-treatment.

The benefits of iCBTI are not just short-term. Improvements in sleep efficiency and reduced insomnia severity tend to last for at least 4 to 48 weeks after finishing the program, suggesting that the behavioral changes learned are durable.

Internet-delivered CBTI significantly reduces the severity of depressive symptoms in adults with insomnia.

Treating insomnia with iCBTI may also help reduce symptoms of depression, which often co-occur with sleep problems. This suggests a dual benefit for individuals struggling with both sleep and mood.

Exercise-based rehabilitation for heart failure significantly reduces hospital admissions and improves health-related quality of life, with no increase in short-term mortality.

If you have heart failure, engaging in a structured exercise program is one of the most effective ways to reduce your risk of being hospitalized and to feel better in your daily life. It is safe and does not increase your risk of death in the short term. Look for a supervised cardiac rehabilitation program that tailors the intensity to your ability.

Exposure to shorter, wider bottles or glasses (vs. taller, narrower) increases the quantity of non-alcoholic beverages selected and consumed.

Using shorter, wider glasses or bottles may lead you to pour and drink more than using taller, narrower ones. If you want to drink less, consider using taller, narrower containers.

Bariatric surgery procedures (SG, RYGB, BPD/DS) significantly increase the risk of micronutrient deficiencies due to reduced oral intake and malabsorption, necessitating lifelong biochemical monitoring and targeted supplementation.

If you undergo bariatric surgery, you must commit to lifelong blood tests and vitamin/mineral supplementation. This is not optional; surgery changes how your body absorbs nutrients, leading to dangerous deficiencies if not managed. Work with your bariatric team to establish a monitoring schedule (typically every 3-12 months initially, then annually) and adhere strictly to prescribed supplements.

Lifelong, structured multidisciplinary follow-up including nutritional supplementation is mandatory after bariatric surgery to prevent deficiencies and manage comorbidities.

You must commit to lifelong medical and nutritional follow-up. This includes regular blood tests and taking prescribed supplements to prevent deficiencies. Skipping follow-up risks serious health complications, even if you feel well.

Bariatric surgery (LAGB) produces significantly greater weight loss than conventional therapy but does not result in statistically greater improvement in Obstructive Sleep Apnea (AHI) severity.

If you have OSA, significant weight loss (whether through surgery or lifestyle) improves your condition, but it is not a guaranteed cure. The study shows that surgery leads to much more weight loss than conventional methods, but this extra weight loss does not necessarily translate to better sleep apnea outcomes. Do not assume surgery will fix your OSA; you still need to be assessed and likely continue CPAP therapy.

Engaging in 7.5-15 MET hours/week of leisure-time physical activity significantly lowers the risk of seven specific cancer types (colon, breast, endometrial, kidney, myeloma, liver, and non-Hodgkin lymphoma) compared to no activity.

Aim for 7.5 to 15 MET hours of leisure activity per week. This is roughly 2.5 to 5 hours of moderate-intensity activity (like brisk walking) or less time of vigorous activity. This level of activity is associated with a significantly lower risk of colon, breast, endometrial, kidney, myeloma, liver, and non-Hodgkin lymphoma cancers. You do not need to exercise at high intensities to gain these benefits; consistency and total volume matter.

Higher levels of physical activity beyond the recommended 15 MET hours/week do not provide additional cancer risk reduction for curvilinear cancers (kidney, gastric, liver, non-Hodgkin lymphoma), whereas linear cancers (breast, colon, endometrial) continue to show reduced risk with higher activity.

If you already do 15+ MET hours of activity per week, you do not necessarily need to increase it further for cancer prevention, especially for liver, kidney, or gastric cancer risks, as the benefit plateaus. However, for breast and colon cancer, higher levels may still offer additional protection. Focus on consistency rather than excessive volume.

Caffeine consumption reduces total sleep time by an average of 45 minutes and decreases sleep efficiency by 7%, with the magnitude of sleep loss increasing as the dose increases and the time of consumption approaches bedtime.

To protect your sleep, treat caffeine like a timed medication. If you drink a standard cup of coffee (approx. 107mg), stop consuming it at least 8.8 hours before you plan to sleep. If you consume a high-dose pre-workout supplement (approx. 217.5mg), you must stop at least 13.2 hours before bedtime. Consuming caffeine closer to bedtime will significantly reduce your total sleep time and efficiency, regardless of your habitual intake.

Multicomponent non-pharmacological management (combining exercise, education, and weight management) yields larger improvements in pain and function than single interventions for hip and knee osteoarthritis.

For hip or knee osteoarthritis, do not rely on just one treatment. Combine exercise (tailored to your ability), education on self-management, and weight loss support (if needed) into a single plan. This combination works better than any single part alone.

Weight loss interventions (diet, multifocused weight loss, or bariatric surgery) reduce pain and disability in knee osteoarthritis, with bariatric surgery being the most effective pain-reducing intervention.

If you are overweight or obese, losing weight can significantly reduce knee pain and disability. Aim for a 5% weight loss through a combination of diet and exercise. Bariatric surgery is the most effective option for pain reduction if other methods fail.

Continuous positive airway pressure (CPAP) therapy significantly improves subjective and objective daytime sleepiness and self-assessed health status in patients with minimally symptomatic obstructive sleep apnoea (OSA), but does not reduce calculated 5-year vascular risk.

If you have minimally symptomatic OSA, CPAP can still significantly reduce your daytime sleepiness and improve how you feel daily, even if your breathing interruptions aren't severe. However, do not expect this treatment to lower your long-term heart disease risk or blood pressure. The benefit is strictly symptomatic. You should trial CPAP to see if the improvement in alertness and health status justifies the nightly inconvenience, but manage expectations regarding cardiovascular protection.