Browse the evidence

Optimizing medications by switching from weight-gain-causing drugs (antipsychotics, sulfonylureas, insulin) to weight-neutral or weight-loss agents (aripiprazole, SGLT2i, GLP-1 RA) facilitates weight management.

If you are gaining weight on psychiatric or diabetes medications, ask your doctor about switching. Some drugs cause significant weight gain, while others are weight-neutral or help you lose weight (like SGLT2 inhibitors or GLP-1 agonists). This optimization can support your weight loss efforts without compromising your primary health condition.

Healthy older adults require approximately 40% more protein per meal (approx. 0.4 g/kg or ~35g) compared to younger adults to maximize muscle protein synthesis due to age-related anabolic resistance.

To build or maintain muscle after age 60, you need more protein per meal than younger people. Aim for about 35 grams of high-quality protein (like 4 oz of chicken or 1 scoop of whey plus eggs) at each main meal, rather than the 20 grams often recommended for athletes. This higher dose is necessary to overcome the natural slowdown in your body's ability to use protein for muscle building as you age.

Creatine monohydrate supplementation (3-5 g/day) combined with resistance training significantly increases lean body mass and strength in healthy older adults.

If you are doing resistance training, adding 3-5 grams of creatine monohydrate daily can help you gain more muscle and strength than training alone. It is safe for older adults and does not harm kidney or liver function.

Significant weight loss achieved through very low calorie diets (VLCD) or bariatric surgery can preserve and enhance beta-cell function in type 2 diabetes, particularly in patients with short disease duration.

If you have Type 2 Diabetes, especially if diagnosed recently, significant weight loss is the most effective way to restore your pancreas's ability to make insulin. This can be achieved through bariatric surgery or a strict 600-calorie daily diet for a short period (1-8 weeks). This is not just about weight loss; it is about 'resting' the beta-cells to restore their function.

Resistance-based exercise and protein supplementation are the most consistently effective strategies to treat sarcopenic obesity, with combination therapies showing more positive results.

To treat sarcopenic obesity, combine resistance exercise with adequate protein intake. This combination is more effective than either alone. Consult a professional to design a safe and effective program.

Ingesting a 30g blend of 25g whey and 5g collagen protein increases both myofibrillar and muscle connective protein synthesis rates in the rested leg of young, recreationally active men.

If you want to support both muscle growth and connective tissue health (tendons/ligaments) after resistance training, try a protein blend containing 25g of whey and 5g of collagen. This specific ratio appears to optimize the amino acid profile (leucine for muscle, glycine for connective tissue) better than whey or collagen alone in young, active men.

Metabolic surgery (RYGB, SG, BPD) is more effective than conservative medical therapy for achieving remission of Type 2 Diabetes Mellitus (T2DM) and improving glycemic control, regardless of the patient's preoperative BMI.

If you have Type 2 Diabetes, especially if medications aren't controlling your blood sugar, metabolic surgery (like gastric bypass or sleeve gastrectomy) is clinically proven to be more effective than drugs or diet alone for achieving remission and preventing long-term complications, regardless of your current weight.

Women with Class III obesity (BMI ≥40.0 kg/m2) are significantly more likely to achieve appropriate gestational weight gain when receiving enhanced care (physician letter, chart, RDN counseling) compared to usual care.

For pregnant women with Class III obesity (BMI ≥40), standard care is often insufficient. They benefit significantly from enhanced interventions including personalized physician letters, access to weight gain charts, and regular registered dietitian counseling. This structured support helps them achieve healthy weight gain goals more effectively than standard care alone.

Frequent, consistent meal planning during behavioral weight loss programs predicts greater weight loss outcomes, whereas average exercise planning frequency does not.

To lose more weight in a behavioral program, focus on planning your meals frequently and consistently. The study shows that higher average meal planning frequency is linked to greater weight loss. Don't rely solely on exercise planning, as it didn't predict weight loss in this study and might even be linked to higher BMI if it leads to overeating. Start by making detailed plans for your meals early in the program and maintain that habit.

GLP-1 receptor agonists (GLP-1 RAs) are effective for preoperative weight loss in orthopaedic surgery patients with obesity and type-2 diabetes, reducing surgical risk without increasing postoperative complications.

If you are having orthopaedic surgery and take GLP-1s (like Ozempic or Wegovy), tell your surgeon and anesthesiologist. You likely need to stop taking them a week before (for weekly doses) or on the day of (for daily doses) to prevent stomach issues during anesthesia. This helps ensure your surgery goes smoothly and reduces infection risk.

Intensive lifestyle interventions (ILIs) utilizing behavioral strategies, frequent sessions (weekly/bi-weekly), and trained facilitators achieve clinically significant weight loss (4-9%) and diabetes prevention, whereas traditional low-intensity consultations (>1 month apart) result in negligible weight loss (<1 kg/year).

If you have obesity, standard monthly doctor visits are unlikely to produce significant weight loss. Seek out an 'Intensive Lifestyle Intervention' program (often modeled after the Diabetes Prevention Program). These programs use trained facilitators (not just doctors) to provide weekly or bi-weekly sessions for the first 3-6 months, focusing on behavioral strategies like self-monitoring and goal setting alongside diet and exercise. This approach can help you lose 4-9% of your body weight, which is clinically significant.

eHealth interventions for weight management are significantly more effective than non-eHealth controls when they incorporate automated feedback, tailored feedback from healthcare providers, or tailored feedback via electronic channels.

To maximize weight loss using digital tools, choose interventions that provide automated feedback on your progress (like weight or diet tracking) or include regular feedback from a health coach, either via phone or electronic messaging. Simply having access to information is less effective than having interactive feedback or professional support.

Higher dietary protein intake (1.2-1.6 g/kg/d) during energy restriction preserves lean mass and promotes fat loss more effectively than lower protein intakes.

When cutting calories to lose fat, aim for 1.2 to 1.6 grams of protein per kilogram of body weight daily. This helps you keep your muscle while losing fat, making your weight loss healthier and more sustainable.

Combined resistance training (upper and lower body) produces significantly greater improvements in muscle-related hormonal markers (follistatin, follistatin/myostatin ratio, adiponectin) and inflammatory reduction (myostatin, CRP) compared to isolated upper or lower body training in overweight and obese men, primarily driven by higher total training volume.

If you are overweight or obese and want to maximize hormonal health and reduce inflammation through resistance training, prioritize a combined upper and lower body routine over isolating specific body parts. Perform this routine 3 times per week, progressively increasing the weight (from 50% to 80% of your one-rep max) over 12 weeks. This approach yields significantly better improvements in muscle-building hormones and inflammation reduction than training only your upper or lower body.

Combining a caloric deficit (500–750 kcal/day) with moderate-to-vigorous aerobic exercise (150–420 min/week) is significantly more effective for weight loss than either diet or exercise alone.

To lose significant weight, you must change your diet. Exercise alone rarely leads to major weight loss. Combine a daily caloric deficit of 500-750 calories with 150 minutes of moderate exercise per week for the best results. Aim for 225-420 minutes of exercise weekly if you want to keep the weight off.

Continued contact with community health workers (Group Maintenance) enables long-term weight loss maintenance in prediabetic adults, whereas self-directed maintenance leads to significant weight regain.

If you have successfully lost weight, do not stop all contact with your support system. The study shows that stopping structured support (Self-Directed Maintenance) leads to significant weight regain. Instead, maintain a low-level connection, such as monthly check-ins with a coach or health worker, to preserve the 'accountability' that helped you lose the weight in the first place. You do not need to attend every single session, but you do need to stay connected.

Tirzepatide, a dual GIP/GLP-1 receptor agonist, provides superior glycemic control and weight loss compared to GLP-1 receptor agonists alone, while offering cardioprotective benefits through lipid lowering and anti-inflammatory mechanisms.

Tirzepatide is a once-weekly injection that activates two gut hormones (GIP and GLP-1) to lower blood sugar, reduce appetite, and protect the heart. It is more effective than older GLP-1 drugs for weight loss and blood sugar control. Start with a low dose to minimize stomach upset, and work with your doctor to find the right dose for you.

Creatine supplementation (3-5 g/day or loading phase) enhances power output and recovery in high-intensity weightlifting by increasing intramuscular phosphocreatine stores.

Take 3-5 grams of creatine daily. If you need faster results, take 20 grams daily for 5-7 days, then drop to 3-5 grams. This increases your muscle's energy stores for explosive lifts.

An intensive lifestyle intervention (ILI) comprising caloric restriction and increased physical activity significantly reduces the progression of kidney disease (decline in eGFR and need for kidney replacement therapy) in adults aged 60 years or older with type 2 diabetes, with benefits persisting after the active intervention ends.

If you are over 60 and have type 2 diabetes, a structured lifestyle program focusing on modest calorie reduction (1200-1800 kcal/day) and building up to 175 minutes of moderate exercise per week can significantly slow kidney damage. This benefit is specific to older adults and persists even after the formal program ends, making it a crucial strategy for renal protection in this demographic.

Improving alignment with the 2018 WCRF/AICR Cancer Prevention Recommendations (higher score) is associated with a significantly lower risk of developing type 2 diabetes in high-risk adults, particularly in those not taking metformin.

To lower your diabetes risk, aim to improve your overall lifestyle alignment. This means maintaining a healthy weight, being physically active (>=150 min/week), eating more plants/fiber, and limiting fast food, red/processed meat, sugary drinks, and alcohol. Even small improvements in these areas can significantly reduce your risk of developing type 2 diabetes, especially if you are not taking metformin.

GLP-1 receptor agonists (e.g., semaglutide, tirzepatide) produce clinically significant weight loss (approx. 10-22%) but are associated with high rates of gastrointestinal adverse events.

GLP-1 medications like semaglutide and tirzepatide are highly effective for significant weight loss (10-22%+), but they come with notable gastrointestinal side effects. They are most effective when combined with lifestyle changes and psychological support, rather than used in isolation.

Resistance exercise and adequate protein intake (1.4-2.4 g/kg body weight) are necessary to preserve lean muscle mass during GLP-1 induced weight loss, as 25-40% of weight lost with GLP-1s may be muscle.

To prevent losing muscle along with fat while on GLP-1s, eat 1.4-2.4 grams of protein per kilogram of body weight daily and engage in regular resistance training. This helps maintain strength and metabolic health, which might otherwise decline by 25-40% of the weight lost.

Adjunctive use of GLP-1 receptor agonists (specifically liraglutide, semaglutide, and tirzepatide) in adults with Type 1 Diabetes significantly improves glycemic control, reduces total daily insulin doses, and promotes weight loss compared to placebo, without increasing the risk of severe hypoglycemia.

If you have Type 1 Diabetes and struggle with weight or high insulin doses, ask your doctor about adding a GLP-1 medication like semaglutide or liraglutide. These drugs can help lower your blood sugar, reduce the amount of insulin you need, and help you lose weight. Be aware that you might experience stomach upset, but starting with a low dose and increasing slowly can help manage this. This is an off-label use for T1D, so discuss the risks and benefits with your healthcare provider.

Consuming 20–40g of whey protein immediately after resistance exercise significantly increases myofibrillar fractional synthetic rate (FSR) and activates the AKT/mTOR signaling pathway (AKT, mTOR, 4E-BP1, p70S6K, rpS6) in healthy adults, thereby extending the post-exercise anabolic window.

For healthy adults engaging in resistance training, consuming 20-40g of whey protein around your workout (either immediately after or up to 45 minutes before) significantly boosts muscle protein synthesis compared to placebo. This strategy activates the AKT/mTOR pathway, which drives muscle repair and growth. You do not need to consume excessive amounts (>40g) to see benefits, and pre-workout consumption may even offer a slight edge in FSR magnitude for some protocols.