Browse the evidence

High-fiber diets protect intestinal barrier integrity by upregulating tight junction proteins (ZO-1, occludin, claudin-3) via short-chain fatty acids (specifically butyrate), thereby reducing the risk of obesity and metabolic disorders.

Eating a diet rich in fiber helps your gut barrier stay strong by producing butyrate, which repairs the seals between gut cells. This reduces inflammation and lowers obesity risk. Start with moderate fiber to avoid bloating, and focus on fruits, vegetables, and beans.

BCAA supplementation (500mg Leucine/250mg Isoleucine/250mg Valine daily) significantly reduces Delayed Onset Muscle Soreness (DOMS) and perceived fatigue in women undergoing resistance training, with effects exceeding those in men.

If you are a female recreational weightlifter, taking a BCAA supplement containing 2.5g Leucine, 1.25g Isoleucine, and 1.25g Valine daily may significantly reduce your muscle soreness and perceived fatigue after workouts compared to not taking them. This allows for better recovery between sessions. Men in this study saw greater strength gains but less specific recovery benefit from BCAAs compared to women.

Dairy consumption improves bone mineral density (BMD) and reduces fracture risk in adults, primarily through high calcium bioavailability and protein-mediated IGF-1 stimulation, whereas plant-based alternatives generally fail to provide equivalent calcium and protein levels.

To support bone health and reduce fracture risk, prioritize dairy products like milk, yogurt, and cheese. They offer superior calcium bioavailability and protein (stimulating IGF-1) compared to plant-based alternatives. If you have lactose intolerance, choose lactose-free milk or aged cheeses. If you are concerned about heart health, know that current evidence does not support avoiding dairy fat, and low-fat dairy may actually help lower blood pressure. Aim to meet daily calcium recommendations (1000-1300 mg) through these foods, ideally combined with adequate Vitamin D.

Vegetarian athletes must pay special attention to micronutrients (Iron, Zinc, Calcium, Vitamin D, Vitamin B12) to support muscle development and prevent deficiencies that could impair performance.

Monitor your levels of Iron, Zinc, Calcium, Vitamin D, and B12. Plant-based diets can be lower in these nutrients, so consider fortified foods or supplements to ensure optimal muscle function and recovery.

The Mediterranean diet improves glycemic control and cardiovascular risk factors, facilitating remission when associated with sustained weight reduction, primarily through anti-inflammatory effects and improved insulin sensitivity.

Adopting a Mediterranean diet—rich in vegetables, fruits, whole grains, legumes, nuts, and olive oil, with moderate fish and minimal processed meat—can significantly improve blood sugar control and heart health. This diet is recommended as a first-line strategy for Type 2 Diabetes because it is sustainable, safe, and effective, especially when it leads to modest weight loss.

Higher intake of dietary fiber and whole grains is associated with lower T2D risk and improved postprandial metabolic responses.

Increase intake of dietary fiber and whole grains. Differentiate between high-quality, minimally processed carbohydrates and refined starches/sugars.

Prebiotics (Inulin, Pectin, Beta-glucans) and Probiotics (Lactobacillus, Bifidobacterium) supplementation can improve gut homeostasis, reduce infection risk, and potentially enhance athletic performance (endurance, strength) by modulating the gut microbiota.

Consider adding prebiotics (like inulin or beta-glucans) and specific probiotic strains (Lactobacillus, Bifidobacterium) to your diet. This can help reduce the risk of respiratory infections and potentially improve endurance performance by supporting gut health and immune function.

Substituting white rice and white bread with brown rice and whole wheat bread, respectively, leads to favorable changes in nutrient intake, specifically increasing fiber, magnesium, zinc, and vitamin E while decreasing total carbohydrates and certain B vitamins.

If you currently eat white rice and white bread, switching to brown rice and whole wheat bread will significantly boost your fiber and magnesium intake. Be aware that this switch might slightly reduce your intake of some B vitamins, so ensure you are getting these from other sources like meat, eggs, or fortified foods.

Dairy products are a primary source of high-quality protein, essential amino acids, and critical micronutrients (calcium, riboflavin, vitamin B12, phosphorus) in the average diet, contributing significantly to daily nutrient requirements.

Include dairy products in your diet to efficiently meet requirements for calcium, vitamin B12, and riboflavin. Cheese and milk are particularly dense sources of these nutrients. While dairy contributes modestly to total calories, its nutrient density is high, making it an efficient food choice for bone health and metabolic function.

Post-exercise branched-chain amino acid (BCAA) supplementation significantly reduces delayed onset muscle soreness (DOMS) compared to placebo in untrained or recreationally active adults.

If you are new to exercise or train recreationally, taking a BCAA supplement (typically 5-10g) after your workout may help reduce muscle soreness the next day. This might help you stick to your routine. However, if you are an advanced athlete, you likely won't see much benefit, and you should prioritize getting enough total protein from food rather than relying on BCAAs.

Adherence to a Mediterranean diet pattern, characterized by high intake of polyphenols, fiber, and healthy fats (olive oil, nuts, fish) and low intake of sugar, refined carbs, and saturated fat, provides hepatic and cardiometabolic benefits for NAFLD, even independent of weight loss.

Adopt a Mediterranean-style eating pattern: eat more vegetables, fruits, whole grains, legumes, nuts, and fish, and use olive oil. Limit red meat, processed foods, sugar, and refined carbs. You don't need to be perfect; even partial adherence helps. This pattern supports liver health and heart health simultaneously.

A well-designed vegan diet, supplemented with Vitamin B12 and Vitamin D, is safe, nutritionally adequate, and effective for maintaining or improving health in the general adult population.

To follow a healthy vegan diet, ensure you eat a wide variety of plant foods daily. Crucially, supplement with Vitamin B12 and Vitamin D (especially in winter). This approach is safe and supports overall health for most adults.

A well-designed vegan diet significantly reduces cardiovascular disease risk factors, including LDL cholesterol, triglycerides, and blood pressure, and can reverse coronary atherosclerosis.

Adopt a well-designed vegan diet to improve heart health. This can significantly lower LDL cholesterol, triglycerides, and blood pressure. For those with existing heart disease, this diet, combined with lifestyle changes, can help reverse atherosclerosis.

Suboptimal intake of fruits and vegetables significantly contributes to global cardiovascular disease mortality, with inadequate fruit consumption linked to approximately 521,395 coronary heart disease deaths and 1,255,978 stroke deaths annually, and inadequate vegetable intake linked to 809,425 coronary heart disease deaths and 210,849 stroke deaths annually.

Increase your daily intake of fruits and vegetables to reduce your risk of heart disease and stroke. The data shows that not eating enough is a major contributor to cardiovascular deaths worldwide. Focus on adding more variety to your meals, as both fruits and vegetables offer distinct protective benefits against coronary heart disease and stroke.

Vitamin D supplementation (≥ 1000 IU/day) reduces the risk of developing diabetes in individuals with prediabetes by improving insulin sensitivity and beta-cell function.

If you have prediabetes, check your Vitamin D levels. Supplementation with ≥ 1000 IU/day can significantly reduce your risk of developing diabetes by improving insulin sensitivity. Monitor calcium levels to avoid hypercalcemia.

Whey protein supplementation (25 g/day for 13 days) significantly reduces exercise-induced muscle damage, as measured by serum creatine kinase (CK) levels, in older adults following prolonged walking, whereas pea protein supplementation at the same dose does not.

If you are over 60 and engage in long-distance walking, whey protein (25g/day) may help reduce muscle damage markers more effectively than pea protein. Ensure you consume it consistently for at least 13 days, starting before your activity.

Oral magnesium supplementation (365 mg elemental magnesium daily for 3 months) significantly improves insulin resistance, HOMA-IR, and metabolic markers in hypomagnesemic, obese, pre-diabetic patients with mild-to-moderate chronic kidney disease.

If you have early-stage kidney disease, are overweight, and have pre-diabetes, getting your magnesium levels checked is a low-cost, high-value step. If you are deficient, taking 365 mg of elemental magnesium daily, alongside a kidney-friendly diet and light exercise, can significantly improve your body's ability to handle insulin and sugar.

Curcumin supplementation combined with piperine significantly reduces symptoms of knee osteoarthritis (pain and physical function) to a degree non-inferior to ibuprofen, with fewer gastrointestinal side effects.

If you have knee osteoarthritis, taking 1500 mg of Curcuma domestica extract daily for four weeks can reduce pain and improve function just as well as taking 1200 mg of ibuprofen, but with fewer stomach issues. Look for standardized extracts.

Carbohydrate ingestion (30-60 g/h) during prolonged endurance exercise attenuates post-exercise inflammation and stress hormone elevation.

For workouts lasting longer than 90 minutes, consume 30-60 grams of carbohydrates per hour. This helps manage stress hormones and inflammation, aiding recovery compared to drinking only water.

Direct supplementation of EPA and DHA is significantly more effective for increasing their levels in the body than consuming their precursor, alpha-linolenic acid (ALA), due to inefficient conversion rates in humans.

If you are not eating fatty fish regularly, do not rely solely on plant sources like flaxseed or walnuts (ALA) to get your omega-3s. Your body converts ALA to EPA and DHA very poorly. To ensure adequate levels for heart and brain health, consider direct supplementation with EPA and DHA, such as from fish oil or algae oil.

Daily supplementation with Vitamin D (2000 IU/day) reduces the risk of acute respiratory tract infections, with the greatest benefit observed in individuals with baseline deficiency (<25 nmol/L).

Take 2000 IU of Vitamin D daily. Do not take it in large, infrequent 'bolus' doses, as this appears ineffective for infection prevention. This is especially critical if you have low baseline levels, where the protection is strongest.

Daily Vitamin C supplementation (≥200 mg/day) reduces the risk, severity, and duration of upper and lower respiratory tract infections, with higher doses (1-2 g/day) recommended during illness.

Take at least 200 mg of Vitamin C daily to support immune function. If you get sick, increase the dose to 1-2 grams per day starting immediately, as your body uses more Vitamin C during infection. Do not exceed 2 grams daily without medical advice.

Vitamin D supplementation reduces the incidence of respiratory tract infections, with protective effects being more pronounced with daily dosing compared to bolus doses.

Consider daily Vitamin D supplementation, especially if you have limited sun exposure. Meta-analyses suggest daily dosing is more effective than occasional large bolus doses for preventing respiratory infections.

The European Calcified Tissue Society recommends food fortification and routine Vitamin D supplementation for specific risk groups (infants, children, pregnant women, older persons, non-Western immigrants) to prevent deficiency.

If you are pregnant, older, a non-Western immigrant, or have young children, do not rely on diet alone. The ECTS recommends routine Vitamin D supplementation. Additionally, look for fortified foods like milk, bread, and cereals to help maintain your levels.