Browse the evidence

Sedentary lifestyle and insufficient physical activity are significant behavioral factors contributing to obesity by reducing energy expenditure.

Increase daily movement by taking short walks, standing more, or doing light exercises during breaks. Aim for at least 30 minutes of physical activity per day to help control weight.

Dietary factors, including high consumption of refined grains, sugar, fats, and liquid calories, contribute to obesity by increasing caloric intake.

Reduce consumption of sugary beverages, processed foods, and refined grains. Focus on whole foods, fruits, vegetables, and whole grains to manage caloric intake and improve health.

Newer obesity management medications (OMMs), specifically semaglutide (2.4 mg) and tirzepatide (10-15 mg), demonstrate high efficacy comparable to metabolic bariatric surgery (MBS) in the short term (26-52 weeks), with tirzepatide achieving >15% TBWL.

For those seeking non-surgical weight loss, newer medications like semaglutide (2.4 mg) and tirzepatide (10-15 mg) are the most effective options available, with tirzepatide showing short-term weight loss (15.2%) comparable to surgical procedures. These require weekly administration and are generally more effective than older medications like orlistat. They are best used in conjunction with lifestyle interventions.

Combining exercise with pharmacotherapy (specifically GLP-1 agonists or orlistat) significantly enhances weight loss, BMI reduction, and body fat percentage compared to exercise alone in overweight/obese adults.

If you are overweight or obese, adding a prescribed weight-loss medication (like GLP-1 agonists or orlistat) to your regular exercise routine will likely result in greater weight and fat loss than exercising alone. While exercise is foundational, medication can help overcome compensatory mechanisms like increased appetite, leading to more significant improvements in body composition.

A modified-release combination of orlistat (120 mg) and acarbose (40 mg) produces significantly greater weight loss (mean -7.73%) compared to modified-release orlistat alone (-5.78%) or conventional orlistat (-5.13%) over 26 weeks.

Take the specific combination pill (EMP16) containing 120mg modified-release orlistat and 40mg modified-release acarbose daily with meals for 6 months. Follow a diet limiting fat to 30% of calories and focusing on low-glycemic foods. Expect roughly 7.7% body weight loss, which is significantly better than taking orlistat alone.

Increasing population-wide daily physical activity levels by even 10% significantly benefits public health by decreasing the incidence of heart attacks and diabetes.

Aim for small increases in daily movement (e.g., taking stairs, walking to colleagues) rather than intense exercise. A 10% increase in total daily activity can have significant health benefits.

Brisk walking (>=1.5 m/s) is a form of moderate intensity physical activity that improves fitness, reduces body fat, lowers blood pressure, increases HDL, and reduces fracture risk.

Walk at a pace of at least 1.5 meters per second (about 3.3 mph) for 30 minutes, 5 days a week. You should be slightly out of breath. This improves heart health, lowers blood pressure, and helps manage weight.

Low-calorie diets (1,000–1,500 kcal/day) are a foundational, guideline-recommended intervention for obesity management, though weight loss plateaus after 6 months.

Start with a daily intake of 1,000 to 1,500 calories, or a 500-750 calorie deficit, as recommended by major guidelines. Expect the most significant weight loss in the first 6 months, but plan for a maintenance phase afterward. Work with a nutritionist to ensure the diet fits your preferences to improve adherence.

Modest weight loss of 5-10% of initial body weight significantly improves cardiovascular risk factors (HbA1c, blood pressure, triglycerides, HDL) in overweight and obese individuals with type 2 diabetes.

If you have type 2 diabetes and are overweight, aiming to lose just 5-10% of your body weight can significantly improve your blood sugar, blood pressure, and cholesterol levels. You don't need to aim for extreme weight loss to see health benefits. Focus on sustainable changes like reducing calorie intake and increasing physical activity to achieve this modest but impactful goal.

Reducing overall carbohydrate intake, particularly to very low-carbohydrate levels (<26% of calories), demonstrates the most evidence for improving glycemia (A1C) and reducing medication needs in adults with type 2 diabetes, especially in the short term (3-6 months).

If you have type 2 diabetes and struggle with blood sugar control, try reducing your carbohydrate intake. Very low-carb diets (under 26% of calories) often lower A1C faster in the first few months. However, you must work with your doctor to adjust your diabetes medications to avoid low blood sugar. This approach is viable for many, but long-term results may be similar to other healthy diets.

Trans fatty acid intake is positively associated with coronary disease risk, supporting guidelines to avoid them.

Avoid trans fats. This large review confirms that higher intake of trans fatty acids is associated with an increased risk of coronary disease, supporting current guidelines to avoid them.

Adhering to five low-risk lifestyle factors (never smoking, moderate alcohol, high diet quality, normal BMI, and regular physical activity) significantly increases life expectancy compared to having zero such factors.

To maximize your life expectancy, aim to adopt five specific habits: never smoke, maintain a BMI between 18.5 and 24.9, eat a diet high in vegetables, fruits, nuts, whole grains, and healthy fats (upper 40% of AHEI), limit alcohol to 5-15g/day (women) or 5-30g/day (men), and exercise for at least 3.5 hours per week at a moderate-to-vigorous intensity. Doing all five can add up to 14 years to your life compared to having none.

Regular physical activity exhibits a strong inverse and linear dose-response relationship with all-cause mortality, cardiovascular disease incidence, and type 2 diabetes mellitus incidence, where greater activity volume yields greater health benefits.

To significantly lower your risk of death, heart disease, and type 2 diabetes, aim for at least 1000 kcal of energy expenditure per week through physical activity. Even half that amount (500 kcal/week) offers some protection. Consistency matters more than intensity for these specific outcomes.

Higher dietary fiber intake is inversely associated with body weight gain, fasting insulin, and cardiovascular disease risk factors in young adults, independent of fat and carbohydrate intake.

To support healthy weight and metabolic function, prioritize high-fiber foods. This study suggests that higher fiber intake is linked to lower body weight, lower insulin levels, and better cardiovascular markers, independent of how much fat or carbohydrate you eat. Focus on getting enough fiber rather than strictly limiting fat or carbs.

Combining lifestyle changes (diet and exercise) with pharmacological treatment is necessary to achieve long-term metabolic control and reduce macro/microvascular complications in Type 2 Diabetes Mellitus.

For Type 2 Diabetes, medication alone is rarely enough for long-term health. You must combine it with diet and exercise. If you are overweight, aim for a daily calorie deficit of 500-1000 kcal. Aim for at least 150 minutes of moderate exercise per week (like brisk walking) plus 2-3 days of strength training. If you have eye or foot complications, consult a professional to tailor the exercise safely. Metformin is usually the first drug used, but lifestyle is the foundation.

Regular physical activity improves whole-body insulin sensitivity (SI) through both acute mechanisms (AMPK/TBC1D1-mediated GLUT4 translocation during exercise) and chronic adaptations (increased capillarization and beta-cell function), with high-intensity interval training (HIIT) and sprint interval training (SIT) offering superior or time-efficient benefits compared to moderate continuous exercise.

To improve insulin sensitivity, aim for regular physical activity. While moderate continuous exercise is effective, incorporating High-Intensity Interval Training (HIIT) or Sprint Interval Training (SIT) may offer time-efficient benefits, especially for those with prediabetes or obesity. Consistency is key, as acute improvements in insulin sensitivity can last up to 72 hours but are lost if exercise stops for 5 days. Focus on both aerobic and resistance exercises for comprehensive glycaemic regulation.

Intensive, multi-component behavioral interventions (12-26 sessions/year) delivered in primary care settings produce clinically significant weight loss (4-7 kg), whereas low-intensity brief counseling by PCPs alone yields negligible results.

To lose significant weight, you need a structured program with frequent check-ins (weekly at first, then bi-weekly, then monthly) over a year. Simply telling you to 'eat less' during a brief doctor's visit is not enough. Look for programs that offer at least 12-26 sessions with a dietitian, psychologist, or trained coach.

Combining behavioral counseling with pharmacotherapy (e.g., orlistat, sibutramine) or meal replacements significantly increases weight loss compared to counseling alone in primary care settings.

If lifestyle changes alone aren't getting you the results you want, ask your doctor about adding FDA-approved weight loss medications like Orlistat. Studies show this can double your weight loss compared to diet and exercise alone. Note: Some older drugs like Sibutramine are no longer available due to heart risks.

Collaborative care models using trained medical assistants or external dietitians as weight loss coaches produce greater weight loss than PCP-led brief counseling, especially when combined with meal replacements or medication.

Ask your primary care office if they have a 'weight loss coach' (often a nurse or medical assistant) who can see you monthly. This collaborative model, where the doctor handles medical risks and the coach handles behavioral support, is more effective than seeing the doctor alone for weight loss.

Consuming casein protein (~30-40 g) before sleep increases muscle protein synthesis and metabolic rate overnight without affecting lipolysis.

If you want to support muscle growth overnight, have 30-40 grams of casein protein (like cottage cheese or a casein shake) right before bed.

Increasing daily dietary fibre intake to 35 grams (or by 15 grams from baseline) significantly reduces all-cause mortality, improves glycaemic control (HbA1c), and lowers cardiometabolic risk factors in adults with prediabetes or diabetes.

To manage diabetes and reduce mortality risk, aim to consume 35 grams of dietary fibre daily, or add 15 grams to your current intake. Focus on whole grains and fibre-rich foods without needing to restrict other macronutrients. This change is associated with fewer deaths and better blood sugar control.

Increasing dietary fibre intake significantly improves glycaemic control, reducing HbA1c by a mean difference of -2.00 mmol/mol and fasting plasma glucose by -0.56 mmol/L in adults with diabetes.

If you have diabetes, increasing your fibre intake can help lower your HbA1c and fasting blood sugar. You do not need to cut out carbohydrates; instead, choose carbohydrate sources that are high in fibre, such as whole grains and vegetables.

During weight-loss maintenance, a very low-carbohydrate diet preserves resting and total energy expenditure significantly better than a low-fat or low-glycemic index diet, thereby mitigating the biological drive for weight regain.

If you have lost weight and are struggling to keep it off, switching to a very low-carbohydrate diet (limiting carbs to ~10% of calories) may help your body burn more energy at rest compared to a standard low-fat diet. This metabolic advantage might counteract the biological urge to regain weight, though it requires strict adherence to carbohydrate limits.

Maintaining a healthy weight and exercising regularly lowers the risk of developing type 2 diabetes in individuals with pre-diabetes.

If you have been told you have pre-diabetes, your best defense is to maintain a healthy weight and stay physically active. This combination is proven to lower your risk of progressing to full-blown type 2 diabetes.