Browse the evidence

Obesity is the most important modifiable risk factor for Type 2 Diabetes, influencing insulin resistance and disease progression.

Obesity is the single most important risk factor for developing Type 2 Diabetes, affecting nearly 90% of diabetic patients. Excess body weight directly contributes to insulin resistance. Managing body weight is therefore the most critical modifiable factor in preventing and managing T2DM.

Reducing sodium intake significantly lowers systolic and diastolic blood pressure in adults and children, with no adverse effects on blood lipids, catecholamine levels, or renal function.

For most adults, reducing sodium intake to less than 2 grams per day (or cutting current intake by at least one-third) will lower blood pressure without harming your kidneys or cholesterol. Focus on reducing processed foods and added salt to achieve this.

Maintaining a BMI between 21 and 25 kg/m² is associated with the lowest risk of all-cause and cause-specific mortality (including cancer, cardiovascular, and respiratory diseases) in never-smokers, whereas obesity (BMI ≥30) reduces life expectancy by 3.5–4.2 years compared to healthy weight.

For long-term health and longevity, aim for a BMI between 21 and 25 kg/m². This range is associated with the lowest risk of death from major diseases like cancer and heart conditions. While being 'overweight' (BMI 25-29.9) is not as dangerous as obesity, this study indicates that health risks start to climb once you exceed 25. Avoiding being underweight (<18.5) is equally critical for maximizing life expectancy.

Glucagon-like peptide-1 (GLP-1) receptor agonists, such as exenatide, promote progressive weight loss in humans over up to two years while improving glycemic control, distinguishing them from other diabetes treatments that often cause weight gain.

GLP-1 receptor agonists are a highly effective treatment for both diabetes and obesity. They work by mimicking a gut hormone that signals fullness to the brain. Unlike many other diabetes drugs, they help patients lose weight progressively over time.

Progressive resistance strength training (PRT) significantly improves physical function, muscle strength, and performance of daily activities in older adults, with large effects on strength and moderate-to-large effects on functional tasks like chair standing.

Engage in progressive resistance training 2-3 times per week using weights, machines, or bands. Start with a weight that challenges you but allows proper form, and gradually increase the resistance as you get stronger. This is one of the most effective ways to maintain independence, strength, and quality of life as you age.

Resistance training is safe for healthy older adults when properly designed with appropriate technique instructions and spotting.

Start with light weights or bodyweight exercises, focusing on perfect form. Get a professional to teach you the movements initially. This is safe and will help you stay independent.

Resistance training counteracts age-related muscle mass and strength loss, improving mobility, physical functioning, and independence in older adults.

Keep moving and lifting. It's not too late to build strength. This will help you do daily tasks easier and stay independent longer.

Mechanical tension, muscle damage, and metabolic stress are the three primary factors responsible for initiating the hypertrophic response to resistance exercise.

Design your workouts to include heavy loads (mechanical tension), exercises that cause some muscle soreness/damage (muscle damage), and sets that leave you pumped with metabolites (metabolic stress). All three contribute to growth.

Daily subcutaneous liraglutide at 3.0 mg significantly increases weight loss in overweight or obese adults with type 2 diabetes compared to placebo when used as an adjunct to lifestyle interventions.

If you have type 2 diabetes and are overweight, adding daily liraglutide (3.0 mg) to your current diet and exercise plan can lead to significant weight loss (about 6% of body weight over 56 weeks) compared to diet and exercise alone. This medication works by reducing appetite. You should discuss the benefits and potential side effects, such as gastrointestinal issues, with your healthcare provider.

Combining moderate exercise with dietary weight loss produces significantly greater improvements in physical function, pain, and mobility in older adults with knee osteoarthritis compared to either intervention alone or usual care.

If you are over 60 with knee arthritis and are overweight, doing just diet OR just exercise is not enough to significantly improve your daily function or pain. You must do both. Aim for a 5% weight loss through diet while engaging in 3 days per week of mixed exercise (walking and light resistance). This combination significantly reduces pain and improves your ability to walk and climb stairs, whereas doing either one alone does not show these benefits compared to doing nothing special.

Combining weight loss (via caloric restriction) with exercise produces greater improvements in physical function and frailty reduction in obese older adults than either intervention alone.

If you are an older adult with obesity and some frailty, combining a moderate calorie-reduced diet with regular exercise (both aerobic and resistance) is the most effective way to improve your daily physical function and reduce frailty. Doing just one of these is less effective than doing both together.

Chronic dynamic aerobic endurance training significantly reduces resting and ambulatory blood pressure in both normotensive and hypertensive adults, with the magnitude of reduction being greater in hypertensive individuals.

Engage in moderate-intensity aerobic exercise (like brisk walking, jogging, or cycling) for about 40 minutes, 3 times a week. You do not need to exercise at high intensities to see blood pressure benefits. This routine has been shown to lower blood pressure effectively, with greater benefits for those who already have hypertension. Consistency over several weeks is key.

Testosterone administration in eugonadal men produces a dose-dependent increase in fat-free mass, muscle volume, strength, and power, following a single linear dose-response relationship without evidence of receptor saturation at supraphysiological levels.

If you are a healthy young man with normal testosterone, adding exogenous testosterone will increase your muscle mass and strength in direct proportion to the dose, even at levels far above what your body naturally produces. You do not need to train harder or eat more protein than normal to see these gains, as the hormonal driver is the primary factor. However, higher doses bring higher risks for side effects like acne and negative lipid changes.

Two-year treatment with orlistat (120 mg three times daily) combined with a controlled-energy diet produces significantly greater sustained weight loss and reduces weight regain compared to placebo plus diet in obese adults.

To sustain weight loss over two years, obese individuals should take 120 mg of orlistat with each of their three main meals while following a controlled-energy diet where 30% of calories come from fat. This combination leads to significantly greater weight loss and less weight regain compared to diet and placebo alone. Be prepared for potential gastrointestinal side effects if fat intake is not strictly managed, as these are expected but usually mild and resolve over time.

Orlistat treatment improves obesity-related cardiovascular and metabolic risk factors, including lowering LDL cholesterol, total cholesterol, and fasting insulin levels, independent of the magnitude of weight loss.

Orlistat not only helps you lose weight but also independently improves your cholesterol levels (LDL and total) and insulin sensitivity. This benefit persists even when accounting for the amount of weight lost, suggesting a direct pharmacologic effect on lipid metabolism due to reduced fat absorption.

Adopting energy-balanced, predominantly plant-based dietary patterns (flexitarian, pescatarian, vegetarian, or vegan) significantly reduces premature mortality by 19-22% and greenhouse gas emissions by 54-87% compared to current global diets.

To improve your health and reduce your environmental footprint, shift your diet towards being predominantly plant-based while maintaining energy balance. Focus on increasing intake of fruits, vegetables, legumes, and nuts. If you eat meat, choose fish or poultry in moderation, and avoid processed meats. This approach is adaptable to your local food culture and has been shown to significantly reduce the risk of premature death from chronic diseases.

Optimizing health outcomes in adults requires integrating sleep, sedentary behavior, and physical activity across the entire 24-hour day, as changes in one behavior affect the time available for others.

Stop viewing exercise in isolation. Your health depends on how you spend your entire day. Prioritize getting enough sleep, break up long periods of sitting, and include physical activity. If you sleep less, try to be more active or less sedentary to compensate, but recognize that all three components matter.

Lorcaserin (10 mg twice daily) combined with lifestyle modification produces significantly greater weight loss and maintenance compared to placebo in obese or overweight adults over 2 years.

Take 10mg of Lorcaserin twice daily alongside a structured diet and exercise plan. This medication helps reduce food intake by targeting specific serotonin receptors in the brain. It is most effective when combined with a daily caloric deficit of 600 kcal and 30 minutes of moderate exercise. Monitor for common side effects like headache or nausea, which are generally mild.

A Mediterranean diet supplemented with mixed nuts (30 g/day) specifically improves memory function (episodic verbal memory) compared to a low-fat control diet in older adults at high cardiovascular risk.

Incorporate 30 grams of mixed nuts (walnuts, hazelnuts, and almonds) into your daily diet. This specific amount, when part of a Mediterranean dietary pattern, has been shown to improve memory function in older adults at high cardiovascular risk over a 4-year period.

Long-acting GLP-1 receptor agonists (liraglutide and semaglutide) improve glycemic control and promote significant weight loss in individuals with type 2 diabetes and obesity by binding to GLP-1 receptors in the pancreas and brain.

GLP-1 agonists like liraglutide and semaglutide are effective treatments for type 2 diabetes and obesity. They work by mimicking a natural hormone to regulate blood sugar and reduce appetite. Liraglutide is approved at 3.0 mg daily for obesity, while semaglutide is being developed for similar uses and oral administration. These drugs target receptors in the pancreas and brain to achieve their effects.

Very-low-carbohydrate ketogenic diets improve glycemic control, insulin sensitivity, and lipid markers in Type 2 Diabetes (T2D) patients, often allowing for the withdrawal of insulin and other medications.

For Type 2 Diabetics, a VLCKD (under 50g carbs) can dramatically improve blood sugar control, insulin sensitivity, and lipid profiles, often allowing for reduced medication needs, sometimes before significant weight loss occurs.

In obese older patients with heart failure with preserved ejection fraction (HFPEF), both caloric restriction and aerobic exercise training significantly increase peak oxygen consumption (peak VO2), and their combined effect is additive.

If you are an older adult with heart failure and excess weight, both diet and exercise can significantly improve your stamina (oxygen consumption). Doing both together provides the biggest boost. While there is a common belief that being overweight protects heart failure patients, structured weight loss through diet and exercise is safe and effective for improving your ability to exercise, provided you are clinically stable.

Obesity, particularly abdominal obesity, increases the risk of type 2 diabetes, with risk rising steeply as BMI increases.

Maintaining a healthy BMI is crucial for preventing type 2 diabetes. The risk of developing diabetes increases significantly as BMI rises, with those having a BMI of 35 or higher facing a dramatically higher risk compared to those with a BMI of 22 or lower.

Higher levels of physical activity are associated with a 10-24% lower risk of developing seven specific cancers (colon, breast, kidney, endometrial, bladder, esophageal adenocarcinoma, and stomach/cardia), with evidence strength rated as 'strong' by the Physical Activity Guidelines Advisory Committee.

Engage in regular physical activity, particularly moderate-to-vigorous intensity, to significantly lower your risk of developing several common cancers. You do not need to be an elite athlete; even modest increases in activity levels compared to a sedentary lifestyle provide measurable protective benefits.