Browse the evidence

Long-term use of FDA-approved obesity medications (orlistat, lorcaserin, phentermine/topiramate-ER) combined with lifestyle interventions produces statistically significant additional weight loss compared to placebo alone, with efficacy varying by drug class.

If you are struggling to maintain weight loss through diet and exercise alone, FDA-approved medications like Orlistat (120mg, 3x daily) can provide an additional 3-4% weight loss compared to lifestyle changes alone. This benefit comes with gastrointestinal side effects that are mitigated by keeping fat intake low. It is most effective when used as an adjunct to, not a replacement for, lifestyle interventions.

Phentermine plus topiramate-extended release (top dose) is the most effective FDA-approved obesity medication for long-term weight loss, producing approximately 9% weight loss relative to placebo at 1 year.

For patients with higher BMI and comorbidities who need significant weight loss, Phentermine/Topiramate (top dose) offers the highest efficacy (~10% loss). However, it requires a strict titration schedule and rigorous contraception for women of childbearing age due to birth defect risks. It is a high-efficacy, high-requirement option.

Ad libitum diets with moderately high protein content (25% energy) and low glycemic index (LGI) significantly reduce weight regain and improve maintenance compared to low-protein/high-glycemic index (HP/HGI) diets in previously obese adults.

To maintain weight loss, prioritize a diet with higher protein (around 25% of calories) and lower glycemic index carbohydrates. You do not need to count calories strictly; eat until satisfied. This approach helps you stay full and prevents the common trap of regaining weight, especially if you switch back to a standard high-carb, low-protein diet.

Adherence to the Mediterranean Diet (MedDiet) significantly reduces the incidence of cardiovascular disease (CVD), including myocardial infarction, stroke, and cardiovascular mortality, in both primary and secondary prevention populations.

Adopt a Mediterranean-style eating pattern as your primary dietary strategy for heart health. Prioritize extra-virgin olive oil as your main fat source, consume plenty of vegetables, fruits, legumes, and nuts, and include moderate amounts of fish and poultry. If you are at high risk for heart disease, this pattern has been shown in large trials to significantly reduce the risk of heart attack and stroke compared to standard low-fat advice.

Physical inactivity (defined as <3.5 hours of moderate-to-vigorous activity per week) is a strong, independent predictor of mortality, increasing risk even in lean women.

Being thin is not enough. If you are lean but sedentary, your risk of death is 55% higher than if you were lean and active. You must maintain regular physical activity (at least 3.5 hours/week of moderate-to-vigorous exercise) to minimize mortality risk, regardless of your body weight.

Structured weight reduction combined with intensive cardiometabolic risk factor management significantly reduces atrial fibrillation symptom burden, severity, and arrhythmia duration compared to general lifestyle advice alone in overweight/obese patients.

For patients with atrial fibrillation and obesity, a structured weight loss program that includes a short period of very-low-calorie dieting followed by lifestyle maintenance, combined with aggressive management of blood pressure and cholesterol, significantly reduces AF symptoms and arrhythmia duration compared to standard advice alone.

Consumption of sugar-sweetened beverages (SSBs) is causally associated with increased body weight, type 2 diabetes, and coronary heart disease risk, primarily due to poor satiation of liquid calories and metabolic effects of high glycemic load.

Reduce or eliminate sugar-sweetened beverages (soda, sweetened juice, energy drinks) to lower your risk of weight gain, type 2 diabetes, and heart disease. Liquid calories from sugar do not make you feel full like solid food, leading to higher overall calorie intake. Switching to water or non-caloric beverages is a high-impact change for long-term health.

Postmenopausal weight loss of 10 kg or more, particularly when maintained, significantly decreases the risk of breast cancer in women who have never used postmenopausal hormones.

If you are postmenopausal and have never used hormone therapy, losing 10 kg or more and keeping it off can significantly lower your risk of breast cancer. This benefit is particularly strong for those who have never used postmenopausal hormones.

Once-weekly semaglutide 2.4 mg delivers significant weight loss (approx. 15-16% in non-diabetics, 9.6% in diabetics) and improves cardiovascular risk factors, and is FDA-approved for chronic weight management in adults with BMI ≥30 kg/m2 or ≥25 kg/m2 with comorbidities.

If you have type 2 diabetes and struggle with weight, once-weekly semaglutide 2.4 mg is a highly effective, FDA-approved option. It can lead to nearly 10% body weight loss when combined with lifestyle changes. While you may experience some gastrointestinal side effects, most people tolerate it well enough to stay on the medication, which is crucial for maintaining the weight loss and improving heart health markers.

Caloric restriction, rather than macronutrient composition, is the primary determinant of weight loss; low-carbohydrate diets do not produce superior long-term weight loss compared to low-fat diets when caloric intake and lifestyle counseling intensity are matched.

To lose weight, focus on creating a caloric deficit through a reduced-calorie diet (1200-2000 kcal/day) and regular physical activity (150+ minutes/week). Do not rely on specific macronutrient ratios (like low-carb or low-fat) for superior results; instead, choose a dietary pattern you can adhere to long-term. Consistent behavioral support and self-monitoring are critical for success.

Sustained caloric restriction (approx. 12% reduction) in nonobese humans for 2 years is feasible and improves cardiometabolic risk factors (lipids, blood pressure, insulin sensitivity) and inflammatory markers (TNF-α, CRP) without adverse effects on quality of life.

For nonobese adults, reducing daily calorie intake by about 12% (roughly 250 calories) for two years is a safe and feasible strategy to significantly improve heart health markers (blood pressure, cholesterol, blood sugar) and reduce inflammation. This can be done without negatively impacting mood, hunger, or sexual function, provided the diet remains nutrient-dense.

Modest weight loss (5-10%) prevents type 2 diabetes in high-risk individuals, while greater weight loss (>10-15%) can induce remission of established type 2 diabetes, particularly when intervention occurs early in the disease course.

If you have prediabetes or early type 2 diabetes, losing just 5-10% of your body weight can significantly lower your risk of developing full-blown diabetes. If you already have diabetes, losing more weight (10-15%) can potentially put the disease into remission, especially if you act early. Focus on sustainable weight loss through diet, medication, or surgery as advised by your doctor, rather than just managing blood sugar with pills alone.

Obesity is a multisystem disease where excess adiposity causes comorbidities across multiple organ systems (cardiovascular, metabolic, malignancy, mental health), and weight loss can prevent or reverse many of these conditions.

Obesity is a serious medical condition affecting your heart, liver, brain, and risk of cancer, not just your appearance. Treating it with weight loss can prevent or reverse many of these health issues. Seek medical help for obesity as you would for any other chronic disease.

Replacing saturated fatty acids (SFA) with polyunsaturated fatty acids (PUFA) or whole grains reduces cardiovascular disease (CVD) risk, whereas replacing SFA with refined carbohydrates does not reduce risk and may increase it.

To lower your heart disease risk, do not just cut saturated fats (found in butter, cheese, fatty meats). You must replace them with the right things. Swap them for unsaturated fats (like olive oil, nuts) or whole grains (oats, brown rice). Avoid replacing them with refined carbohydrates (white bread, sugar), as this does not lower risk and may increase it. Plant proteins are also a beneficial replacement option.

Chronic endurance training induces skeletal muscle adaptations, including increased mitochondrial density and capillary supply, which shift fuel reliance toward fat oxidation and reduce glycolytic flux, thereby enhancing endurance performance capacity.

To improve endurance, focus on training that specifically targets your sport's demands. Your body adapts by building more mitochondria and blood vessels, allowing you to burn fat more efficiently and spare glycogen. Don't just add endless miles; ensure your training intensity and duration are sufficient to trigger these adaptations, as there is a point of diminishing returns where more volume adds fatigue without further performance gains.

Bariatric-metabolic surgery (Roux-en-Y gastric bypass or sleeve gastrectomy) significantly increases the probability of histological NASH resolution without worsening fibrosis compared to lifestyle modification plus best medical care in patients with obesity and NASH.

For individuals with obesity and confirmed NASH, bariatric surgery (Roux-en-Y or sleeve gastrectomy) is a highly effective treatment for resolving liver inflammation and fibrosis, far outperforming lifestyle changes and medical therapy alone. This should be considered a primary treatment option for eligible patients.

Adhering to a cluster of ideal lifestyle practices (regular physical activity, sound nutrition, weight management, and tobacco avoidance) reduces the risk of cardiovascular disease by more than 80% and diabetes by more than 90%.

To drastically lower your risk of heart disease and diabetes, focus on four core daily habits: move moderately for at least 150 minutes a week, eat a diet rich in plants and whole grains, maintain a healthy weight, and do not smoke. You do not need to be perfect; even small improvements in these areas yield significant health benefits.

Smoking cessation significantly reduces the risk of cardiovascular disease and stroke, with substantial benefits accruing over a very brief period of time.

If you smoke, quitting is one of the most impactful things you can do for your heart health. The benefits start quickly, so seek support through counseling or medications to help you quit.

Replacing trans fatty acids with unsaturated fats significantly reduces the risk of coronary heart disease, whereas replacing saturated fat with carbohydrates provides little to no benefit.

Eliminate trans fats completely by avoiding partially hydrogenated oils. Replace saturated fats (found in red meat and dairy) with unsaturated fats (found in nuts, fish, soy, and non-hydrogenated vegetable oils). Do not replace saturated fats with refined carbohydrates (like white bread or sugar), as this offers little heart benefit. Reducing red meat and dairy while increasing nuts, fish, and vegetable oils improves your fatty acid mix and reduces heart disease risk.

Replacing saturated fat with polyunsaturated fat reduces the risk of coronary heart disease, whereas replacing saturated fat with carbohydrates does not significantly reduce risk.

If you consume saturated fats (from red meat, butter, cheese), try replacing some of them with unsaturated fats (from nuts, seeds, fish, olive oil). This substitution lowers heart disease risk. However, simply cutting saturated fat and eating more carbohydrates (bread, pasta, sugar) will not lower your heart disease risk.

Lifestyle intervention can prevent or delay the onset of type 2 diabetes for at least 10 years.

Lifestyle changes can prevent or delay type 2 diabetes for at least 10 years. Focus on losing 7% of your body weight and getting 150 minutes of moderate physical activity each week. Consistency is key, and structured support programs can help maintain these habits over the long term.

Replacing saturated fat with refined carbohydrates does not reduce coronary heart disease (CHD) risk and may increase it, whereas replacing saturated fat with unsaturated fats (monounsaturated or polyunsaturated) reduces CHD risk.

Do not simply cut fat to reduce heart disease risk. If you reduce saturated fats (like butter or fatty meats), replace them with unsaturated fats (like olive oil, nuts, or fish) rather than refined carbohydrates (like white bread or sugar). Replacing saturated fat with refined carbs offers little to no benefit for heart disease risk.

High intake of refined carbohydrates and sugary beverages is associated with an increased risk of type 2 diabetes and coronary heart disease, whereas high intake of fiber from whole grains is associated with lower risks of these conditions.

Focus on the quality of your carbohydrates. Replace refined sugars and starches (found in sugary drinks, white bread, and pastries) with whole grains and high-fiber foods. This shift lowers the risk of type 2 diabetes and heart disease.

Trans-fatty acids from partially hydrogenated oils have the most adverse health effects on a gram-for-gram basis, increasing LDL, decreasing HDL, and raising CHD risk more than saturated fats.

Avoid foods containing partially hydrogenated oils, as they contain industrial trans fats which are highly harmful to heart health. Check nutrition labels for this ingredient. Natural trans fats in small amounts from animal products are not the primary concern.