Browse the evidence

Community-based cardiovascular disease (CVD) preventive interventions significantly reduce daily energy intake, fat percentage, and saturated fat percentage, while increasing fiber intake.

To improve your diet for heart health, look for community programs that offer active coaching and education, not just pamphlets. These programs successfully help people eat fewer calories, less saturated fat, and more fiber. The key is active participation and support, not just reading advice.

Weight loss, achieved through lifestyle changes, medications, or bariatric surgery, is associated with significant improvements in OSA severity, with a 20% BMI reduction leading to an average 57% decrease in AHI.

Losing weight is one of the most effective ways to reduce OSA severity. If you lose 20% of your body weight, your sleep apnea severity (AHI) can decrease by an average of 57%. This can be achieved through lifestyle changes, medications like tirzepatide, or bariatric surgery, and offers cardiovascular benefits that PAP alone may not provide.

Weight loss exceeding 10% of body weight significantly reduces liver fibrosis in patients with non-alcoholic fatty liver disease (NAFLD).

To reverse liver scarring (fibrosis), you need to lose more than 10% of your total body weight. Losing 5-7% helps with liver fat, but hitting that 10% threshold is the key to fixing the scar tissue. This is the most effective treatment currently available.

Fasting interventions significantly reduce liver health biomarkers (ALT and liver stiffness) in individuals with MASLD compared to control diets.

For those with MASLD, structured fasting approaches (like Alternate Day Fasting, 5:2 diets, or Time-Restricted Eating) have been shown in meta-analyses to significantly lower liver enzymes (ALT) and reduce liver stiffness compared to control diets. These benefits are linked to improvements in insulin resistance and triglyceride levels. Most effective studies lasted 3 months, so long-term sustainability needs more research, but the short-term liver health gains are robust.

A primary care-led, very-low-calorie diet (825-853 kcal/day) can induce remission of type 2 diabetes, with remission rates directly correlating to the magnitude of weight loss (86% remission with >15% weight loss).

If you have early-stage type 2 diabetes, talk to your doctor about a medically supervised very low-calorie diet (around 800-850 calories/day). The goal is to lose at least 15kg (33lbs) if you weigh 100kg, or roughly 15% of your body weight. This specific level of weight loss has been shown to put diabetes into remission in the majority of cases by reducing fat in the liver and pancreas.

A 12-month behavioral weight-loss intervention combining energy-restricted diets (20% or 35% fat) with nutrition education and exercise produces sustained weight loss and improved cardiometabolic markers, regardless of whether the diet is lower-fat or moderate-fat.

To lose weight sustainably, focus on creating a caloric deficit through a balanced, nutrient-dense diet and regular exercise, rather than obsessing over specific fat percentages. Whether you choose a lower-fat or moderate-fat diet, the key is adherence to behavioral changes, improved diet quality, and consistent physical activity. Aim for a 500-1000 calorie daily deficit initially, then transition to maintenance calories while keeping diet quality high.

A comprehensive behavioral intervention including nutrition education and exercise improves cardiometabolic risk factors (total cholesterol, LDL, HDL, triglycerides, CRP, systolic blood pressure) and body composition (lean mass, body fat, VO2max) over 12 months, regardless of whether the diet is lower-fat or moderate-fat.

Improving your diet and exercise habits not only helps with weight loss but also significantly improves your cholesterol, blood pressure, and overall heart health. These benefits are achieved regardless of whether you choose a lower-fat or moderate-fat diet, as long as you maintain a healthy lifestyle.

Sustained, non-surgical, non-pharmacological weight loss from overweight (BMI ≥25) to healthy weight (BMI <25) during midlife (ages 40-50) is associated with a significantly decreased risk of incident chronic diseases (excluding type 2 diabetes) and all-cause mortality compared to persistent overweight.

If you are in midlife (40s-50s) and currently overweight, achieving and maintaining a healthy BMI (under 25) through lifestyle changes (diet and exercise) significantly lowers your risk of developing chronic diseases and dying prematurely compared to staying overweight. This benefit is independent of diabetes risk and does not require surgery or medication. The key is sustainability; the health benefits accrue over decades.

A structured primary care intervention combining a phased caloric-restricted diet (initially low-carbohydrate) and progressive aerobic activity, delivered via frequent GP visits, produces statistically significant weight loss (≥5% and ≥10%) compared to usual care in patients with obesity.

If you have obesity, ask your doctor for a structured plan rather than general advice. Look for programs that include frequent check-ins, a written diet guide, and a specific exercise goal. The study showed that a strict 4-week start followed by a balanced diet and daily walking/cycling, managed by your doctor, leads to better weight loss than standard care.

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.

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.

Achieving a weight loss of ≥10% within the first year after a Type 2 diabetes diagnosis significantly increases the likelihood of biochemical remission (HbA1c < 48 mmol/mol without medication) at 5 years.

If you have been recently diagnosed with Type 2 diabetes, aim to lose 10% of your body weight within the first year. This level of weight loss, even without extreme diets or intensive programs, significantly doubles your chances of putting the disease into remission (normalizing blood sugar without medication) within five years. Focus on sustainable weight loss rather than extreme restrictions.

Weight loss achieved between 1 and 5 years after diagnosis is also associated with diabetes remission, with a risk ratio of 2.43 for ≥10% weight loss.

Even if you haven't lost weight in the first year, losing 10% of your body weight between year 1 and year 5 after diagnosis is still strongly associated with putting Type 2 diabetes into remission. It is never too late to start losing weight for this benefit.

Lifestyle interventions involving caloric restriction and increased physical activity reduce the risk of incident Chronic Kidney Disease in overweight or obese diabetic patients by approximately 30%.

If you are overweight and have diabetes, combining a healthier diet with regular physical activity can significantly lower your risk of developing kidney disease. This approach works by reducing weight, blood sugar, and blood pressure.

Low energy availability (LEA) of 25 kcal/kg fat-free mass per day significantly reduces daily integrated myofibrillar and sarcoplasmic muscle protein synthesis in trained females, even when protein intake is maintained at 2.2 g/kg lean mass per day.

If you are a trained female athlete trying to build or maintain muscle while in a caloric deficit, simply eating high protein is not enough. You must ensure your energy availability is sufficient (above ~30 kcal/kg fat-free mass). Severe energy restriction will blunt muscle protein synthesis and lean mass gains, even with optimal protein intake. Focus on balancing energy intake with exercise expenditure.

Skeletal Muscle Mass (SMM) and Appendicular Lean Soft Tissue (ALST) are critical protective factors against frailty, diabetes, and mortality, and their loss (sarcopenia) is an independent risk factor for adverse health outcomes.

Prioritize resistance training to build and maintain muscle mass, especially as you age. Muscle is not just for aesthetics; it is your primary organ for glucose disposal and metabolic health. If you are losing weight, ensure you are doing resistance training and consuming adequate protein to prevent muscle loss, which can lead to frailty and weight regain.

Cardiac rehabilitation programs that include structured exercise training significantly improve cardiorespiratory fitness (peak VO2) in patients with type 2 diabetes, thereby reducing cardiovascular risk factors.

If you have Type 2 Diabetes and heart disease, supervised exercise is one of the most effective ways to improve your heart health and longevity. Start with a cardiac rehabilitation program to ensure safety and maximize benefits.

Losing obesity (achieving non-obesity status) after having been obese in young adulthood normalizes the risk of MASLD, at-risk MASH, and increased liver stiffness to levels comparable to those who were never obese.

If you were obese in your young adulthood but have since lost the weight to a non-obese range, your risk for serious liver conditions (like MASH and fibrosis) is likely the same as someone who was never obese. You do not need to worry about 'permanent' liver damage from your past obesity if you have achieved and maintained a healthy weight.

Moderate and sustained weight loss through combined diet, exercise, and lifestyle modifications improves blood glucose levels, insulin action, and reduces the need for diabetic medications in individuals with obesity and type 2 diabetes.

If you have obesity and Type 2 Diabetes, losing weight is the most critical step you can take to improve your health. You don't need a specific pill or extreme diet; focus on a sustainable combination of eating less, moving more, and changing daily habits. This approach directly improves how your body handles sugar and insulin, potentially reducing your need for medication.

A caloric deficit of 500–750 kcal/day is the primary driver of weight loss in patients with diabetes, whereas exercise alone is insufficient for initial loss but critical for maintenance.

To lose weight, you must eat less. Focus on creating a daily calorie deficit of 500-750 calories. Do not rely on exercise alone to drop the weight initially, as diet is far more effective for that. Once you have lost the weight, use exercise (150 minutes of moderate activity and resistance training twice a week) to keep it off. If you take insulin, check your blood sugar often when you start eating less to avoid dangerous lows.

In individuals with high central adiposity (high trunk fat), replacing sugar-sweetened beverages with either unsweetened beverages or artificially sweetened beverages leads to greater weight loss compared to continuing to consume sugar-sweetened beverages.

If you carry extra weight around your stomach, switching your daily sugary drinks to water or diet soda can help you lose weight or prevent weight gain over a year. This benefit is specific to those with higher belly fat; if you are lean, you might not see a weight change, but you also won't gain weight from the switch.

Sustained weight loss of at least 15% significantly improves glycemic control, reduces cardiometabolic risk, and can induce remission of Type 2 Diabetes (T2DM).

To potentially reverse Type 2 Diabetes, aim for a sustained loss of 15% or more of your body weight. This threshold is linked to significant improvements in blood sugar control and reduced heart disease risk. Be aware that maintaining this loss is biologically challenging due to appetite changes, so long-term strategies (like medication or surgery) may be necessary to support this goal.

Low muscle glycogen availability prior to soccer match-play causes early fatigue, characterized by reduced high-intensity sprinting and increased low-intensity walking, whereas maintaining normal glycogen stores preserves high-intensity performance.

Ensure you have high muscle glycogen stores before kickoff. If you start with low glycogen, you will likely slow down, walk more, and sprint less effectively. Prioritize carbohydrate intake in the days leading up to the match to maintain 'normal' glycogen levels and preserve high-intensity performance.

Among patients receiving intensive lifestyle intervention, achieving ≥10% weight loss in the first year is associated with a significant reduction in all-cause mortality compared to the control group.

If you are doing an intensive lifestyle program for type 2 diabetes, aim for 10% weight loss in the first year, as this specific threshold is associated with lower mortality risk. However, even if you don't reach 10%, the health benefits for blood pressure, fitness, and quality of life are still valuable.