Browse the evidence

Lifestyle modification and weight loss are the primary, constant interventions for managing insulin resistance and its associated long-term health risks in patients with Polycystic Ovarian Syndrome (PCOS).

If you have PCOS, prioritize lifestyle changes like diet and exercise as your main treatment strategy. Losing even a small amount of weight (5% or more) can significantly improve your menstrual cycles and fertility. This approach addresses the root cause (insulin resistance) and protects your long-term health against diabetes and heart disease, rather than just treating symptoms.

Adherence to high-quality dietary patterns, specifically the Mediterranean diet, is associated with a significantly lower risk of incident frailty in older adults.

Focus on eating more fruits, vegetables, legumes, nuts, and olive oil while reducing meat and dairy. This pattern is consistently linked to lower frailty risk in older adults. You do not need to be perfect; even moderate adherence shows benefits.

Protein supplementation alone does not improve functional frailty outcomes (lean body mass, strength, gait speed) in pre-frail or frail older adults, but when combined with exercise training, it yields greater benefits than exercise alone.

Do not rely on protein supplements alone to fight frailty. They are ineffective without physical activity. Combine protein supplementation (up to 32g/day) with exercise training to see improvements in muscle mass and strength.

Mean propulsive velocity (MPV) provides a highly accurate estimate of relative load (%1RM) in the full back squat, allowing for real-time load monitoring and prescription without the need for traditional 1RM testing.

Use a velocity sensor to track your squat reps. If you can move a weight faster than usual (higher MPV), it is effectively lighter than you think, so increase the weight. If you move it slower, decrease the weight. This replaces the need to test your max every few weeks.

Regular consumption of whole grain foods is associated with a significant reduction in the risk of coronary heart disease (CHD), specifically showing a 26% risk reduction in meta-analyses of cohort studies.

To lower your heart disease risk, aim for about three servings of whole grains daily. This could be one bowl of bran or oat cereal and two slices of dark bread. Ensure your overall diet is low in saturated fat and cholesterol to maximize these benefits. Whole grains offer more protection than refined grains or isolated fiber supplements because they contain essential bran and germ nutrients.

Oral magnesium supplementation (median 15 mmol/day or 360 mg/day) for 4–16 weeks significantly reduces fasting plasma glucose levels in patients with Type 2 diabetes.

If you have Type 2 diabetes, taking a magnesium supplement (around 360 mg/day of elemental magnesium) for at least a month may help lower your fasting blood sugar. However, it does not appear to significantly change your long-term average blood sugar (HbA1c) over the short term. It is safe for most, though it can cause mild stomach upset. Always consult your doctor before starting, especially if you have kidney issues.

High-protein diets (exceeding 0.8 g/kg BW) promote weight loss and fat mass reduction primarily by increasing satiety through anorexigenic hormones (GLP-1, CCK, PYY) and decreasing orexigenic hormones (ghrelin), while simultaneously increasing energy expenditure via the thermic effect of food (DIT).

To lose fat while keeping muscle, increase your protein intake to at least 0.8g per kg of body weight, ideally higher (up to 2.3g/kg for athletes). This works by making you feel fuller (via hormones like GLP-1 and CCK) and burning more calories during digestion (thermic effect). Focus on high-quality sources like whey, casein, or plant proteins, and ensure you are in a caloric deficit for weight loss.

Early time-restricted feeding (eTRF), defined as an 8-hour eating window between 06:00 and 15:00, significantly improves insulin sensitivity, reduces fasting glucose, lowers body mass and adiposity, and reduces inflammation in healthy non-obese adults compared to ad libitum eating.

If you are healthy and not obese, try eating all your meals within an 8-hour window that ends by 3 PM (e.g., 7 AM to 3 PM). You do not need to count calories or restrict food types, just the timing. This specific timing window has been shown to improve insulin sensitivity and reduce body fat more effectively than eating later in the day or eating whenever you want.

Improving cardiorespiratory fitness (CRF) is a more effective strategy for reducing mortality risk and improving pancreatic beta-cell function in metabolic syndrome than weight-loss strategies focused solely on fat loss.

Stop obsessing over the scale. Focus on getting fitter. Activities that raise your heart rate and improve your cardiorespiratory fitness (like brisk walking, cycling, or swimming) are more critical for your long-term health and survival than just trying to lose pounds. You can be 'fit and fat' and have better health outcomes than being 'unfit and thin.'

Professional football players with limited game time (<60 minutes) require a compensatory training session (MD+1C) the day after competition to replicate competition-level external loads, as standard recovery sessions fail to maintain their high-intensity running and acceleration/deceleration capacities.

If you are a coach or athlete managing a team where not everyone plays the full 90 minutes, do not give non-starters a passive recovery session the day after the game. Instead, design a high-intensity small-sided game session that mimics the accelerations and decelerations of a match. This compensatory training is essential to maintain the fitness levels of players who get limited game time, preventing them from falling behind their starters in physical capacity.

Online response inhibition training targeting high-energy density foods reduces real-world weight and energy intake in overweight/obese adults.

Perform four 10-minute online sessions of a 'go/no-go' computer game where you must withhold responses to pictures of your favorite high-calorie snacks (like chips or chocolate). Do these sessions over one week. This simple cognitive exercise has been shown to help overweight adults lose weight and eat fewer calories in the real world by reducing automatic impulses to eat those foods.

High-dose, high-intensity aerobic exercise (600 kcal/session) without dietary restriction can achieve clinically meaningful weight loss (>3-5%) in young, obese adults.

For young, obese individuals, high-volume aerobic exercise (5x/week, ~600 kcal/session) can achieve >5% weight loss without dieting. This requires significant time and effort.

A very low carbohydrate diet (14% energy, <50g/day) with low saturated fat (<10%) and high unsaturated fat improves glycemic control (HbA1c) and reduces medication requirements in type 2 diabetes patients with baseline HbA1c >7.8%, compared to a high-carbohydrate diet.

If you have Type 2 Diabetes and your HbA1c is above 7.8%, switching to a very low-carb diet (under 50g carbs/day) while keeping saturated fat low (under 10% of calories) can significantly lower your blood sugar and reduce your need for diabetes medication compared to standard high-carb advice. Ensure you replace carbs with unsaturated fats (like olive oil, nuts) rather than saturated fats to maintain healthy cholesterol levels.

A very low carbohydrate diet reduces glycemic variability (GV) and time spent in hyperglycemic ranges in Type 2 Diabetes patients, regardless of baseline HbA1c levels, compared to a high carbohydrate diet.

Using a very low carbohydrate diet (<50g/day) helps stabilize blood sugar levels throughout the day, reducing dangerous spikes and swings (glycemic variability). This is beneficial for reducing oxidative stress and cardiovascular risk, independent of average blood sugar levels.

Bariatric surgery is significantly more effective than conventional medical therapy in achieving weight loss, glycemic control, and type 2 diabetes remission in patients with BMI ≥25.

For patients with obesity and Type 2 Diabetes, conventional medical therapy (diet, exercise, medication) often fails to achieve long-term remission, with 50-90% of patients failing to control their diabetes. Bariatric surgery offers a significantly higher chance of remission (63.5% vs 15.6%) and greater weight loss compared to conventional therapy. While surgery is invasive, it addresses the physiological mechanisms of diabetes more effectively than lifestyle changes alone for this population.

Supplementing with 15g of collagen peptides daily, taken within 60 minutes after resistance training, significantly increases fat-free mass, muscle strength, and fat loss in elderly men with sarcopenia compared to placebo.

If you are an older man experiencing muscle loss, take 15 grams of collagen peptides every day. On days you lift weights, drink it within an hour of finishing your workout. Stick with this for at least 3 months alongside a consistent resistance training program to see significant improvements in muscle mass and strength.

Short sleep duration (defined as <7 hours per night) is consistently associated with an increased risk of developing obesity and type 2 diabetes mellitus (T2DM) in adults and children, with a dose-response relationship where shorter sleep correlates with higher risk.

Aim for 7-8 hours of sleep per night. Consistently getting less than 7 hours is a significant risk factor for gaining weight and developing type 2 diabetes. This is not just about feeling tired; it affects your body's energy balance and insulin sensitivity. Protecting your sleep duration is as critical for metabolic health as your diet and exercise habits.

Pharmacotherapy with orlistat or sibutramine combined with dietary modification is efficacious in reducing weight regain after initial weight loss.

If you have lost weight, maintaining it is hard. This review suggests that using FDA-approved weight loss medications like orlistat or sibutramine, alongside a healthy diet, can help prevent you from gaining the weight back. This is a valid strategy to consider if lifestyle changes alone are not enough.

Adherence to physical activity routines is efficacious in reducing weight regain after weight loss treatment.

To keep weight off, sticking to a regular exercise routine is effective. You don't need a specific intense program, but you do need to adhere to physical activity. This helps prevent weight regain.

Self-monitoring behaviors, specifically weighing oneself, are significantly related to maintaining weight loss.

Weighing yourself regularly is a key behavior for keeping weight off. The review found this self-regulatory behavior is significantly related to maintaining weight loss. Use the scale as a tool to stay on track.

Daily vitamin D supplementation (800-1000 IU) improves muscle strength, gait, and reduces fall risk in elderly and frail populations, whereas large intermittent high doses are ineffective.

If you are elderly or frail, take 800-1000 IU of Vitamin D daily. Do not rely on large, infrequent 'bolus' doses (like 150,000 IU every few months) as they do not improve muscle strength or prevent falls effectively. Consistency is key to maintaining the muscle benefits.

Resistance training with loads ≤60% 1RM promotes substantial increases in muscle strength and hypertrophy in untrained individuals, provided training is performed to momentary muscular failure.

If you are new to lifting or lack heavy equipment, you can still build significant muscle and strength using lighter weights (up to 60% of your max). The key is to perform enough repetitions until you physically cannot complete another repetition with good form. This approach is effective for beginners, though heavier loads may offer a slight edge for advanced lifters.

Sleeping less than 6 hours per day significantly increases the risk of developing chronic diseases, specifically stroke and cancer, compared to sleeping 7-8 hours.

Aim for 7-8 hours of sleep per night to minimize the risk of stroke and cancer. If you sleep less than 6 hours, your risk for these conditions increases significantly. For those with hypertension, daytime napping may increase risk, whereas for non-hypertensive individuals, it might be protective. Prioritize consistent, adequate night sleep over compensatory napping if you are hypertensive.

Consuming whole fruits and vegetables (400-600g/day) reduces the risk of cardiovascular disease, cancer, and cognitive decline through synergistic phytochemical effects, whereas isolated phytochemical supplements may be ineffective or harmful due to lack of synergy and potential toxicity.

Eat 5 to 8 portions of fruits and vegetables every day (about 400-600 grams). Do not rely on isolated phytochemical supplements to replace this, as they lack the synergistic benefits of the whole food and may be harmful in high doses. Focus on variety (broccoli, garlic, cocoa, olives, grapes) to maximize health potential.