Browse the evidence

Red meat is a significant source of long-chain omega-3 polyunsaturated fatty acids (EPA, DHA, DPA), particularly when animals are pasture-fed.

Choose pasture-fed red meat to maximize your intake of long-chain omega-3 fatty acids (EPA, DHA, DPA). While fish is the best source, red meat is a significant contributor to your daily omega-3 intake.

Maintaining linoleic acid (LA) intake at 5-8% of energy is critical for cardiovascular health because it sets a threshold that mitigates the cholesterol-raising effects of saturated fats and cholesterol.

Aim to get 5-8% of your daily calories from linoleic acid (found in vegetable oils like soybean, corn, and sunflower oil). This amount acts as a buffer, preventing saturated fats and dietary cholesterol from raising your bad cholesterol (LDL) levels. Simply reducing total fat without ensuring adequate LA intake may not protect your heart.

Frequent consumption of nuts (defined as >5 units/week, where 1 unit = 1 oz) is associated with a significantly reduced risk of total coronary heart disease, fatal coronary heart disease, and non-fatal myocardial infarction in women.

Incorporate more than 5 ounces of nuts (about 1/2 cup) into your weekly diet. This frequency is linked to a significantly lower risk of heart disease and heart attacks in women. Focus on whole nuts rather than peanut butter with hydrogenated fats, as the unsaturated fats in nuts help improve blood lipid levels.

The protective association between frequent nut consumption and reduced coronary heart disease risk persists after adjusting for other dietary factors such as saturated fat, polyunsaturated fat, trans fat, fiber, vegetables, and fruits.

Adding nuts to your diet provides heart health benefits that are not negated by your other healthy dietary choices like eating vegetables and fruits. It acts as an independent protective factor.

Adopting a vegan diet significantly reduces saturated fatty acid intake to approximately 5% of total energy, which is less than half the intake observed in meat-eaters (10-11%).

To significantly lower your saturated fat intake, eliminating meat, fish, dairy, and eggs (vegan diet) is the most effective strategy, cutting saturated fat to about half the level of a standard meat-eating diet. This shift is associated with lower BMI and higher fiber intake.

Reducing saturated fat intake and replacing it with polyunsaturated fat reduces the risk of cardiovascular events by approximately 17%, whereas replacing saturated fat with carbohydrate or protein yields no clear benefit.

To lower your risk of heart disease, reduce your intake of saturated fats (found in animal fats and some tropical oils) and replace those calories with polyunsaturated fats (found in plant oils, nuts, and seeds). Simply cutting fat without replacing it with healthy unsaturated fats, or replacing it with carbohydrates, does not appear to offer the same cardiovascular protection. Aim for a long-term dietary pattern rather than a short-term diet.

Visceral adipose tissue (VAT) is a stronger independent risk factor for type 2 diabetes in women than in men, making waist circumference a more reliable predictor of risk in women.

For women, where you store fat matters more than your total weight. Visceral fat (around your organs) is a much stronger predictor of diabetes than BMI. Focus on reducing waist circumference through lifestyle changes, as this visceral fat drives insulin resistance more significantly in women than in men.

Adjuvant chemotherapy causes sarcopenic obesity, characterized by increased fat mass and decreased or stagnant lean body mass, particularly in the legs.

Chemotherapy often causes 'sarcopenic obesity,' where you gain fat but lose muscle, especially in your legs. This is different from normal weight gain. To counteract this, prioritize resistance training (strength exercises) for your lower body to preserve muscle mass, rather than just focusing on the number on the scale.

The health effects of saturated fat are dependent on the food matrix and the overall dietary pattern, particularly carbohydrate intake, such that high saturated fat intake combined with low carbohydrate intake does not increase circulating saturated fatty acids or CVD risk.

If you are insulin resistant or consuming a high-carbohydrate diet, high saturated fat intake may be less beneficial. However, if you reduce carbohydrates, your body will oxidize saturated fat for energy, leading to lower circulating levels of harmful lipids. Focus on the balance of macronutrients rather than just cutting saturated fat.

Consumption of school breakfast and lunch meals significantly improves the micronutrient intake of school-age children, particularly those from low-income families.

Ensure children participate in school breakfast and lunch programs to guarantee they receive essential vitamins and minerals, especially if they come from low-income households.

Long-term dietary patterns (specifically high plant fiber vs. high protein/fat) are the primary determinant of stable adult gut microbiome composition and enterotype classification.

Your long-term eating habits, not your last meal, define your gut ecosystem. To shift your microbiome toward a healthier state (e.g., increasing fiber-digesting bacteria), you must consistently consume high-fiber plant foods over months and years. Short-term diets will cause temporary shifts, but your microbiome will likely bounce back to its previous state once you return to your usual diet.

Higher intake of polyunsaturated fat is associated with a significantly lower risk of coronary heart disease (CHD) in women, particularly among those younger than 65 years or with a BMI ≥ 25 kg/m².

Focus on the type of fat you eat rather than just cutting total fat. Increasing your intake of polyunsaturated fats (like those in vegetable oils, nuts, and fish) is linked to a lower risk of heart disease, especially if you are under 65 or overweight. Conversely, avoid trans fats, which increase risk.

Dietary interventions, particularly those involving calorie restriction, high protein, or specific macronutrient compositions, can alter gut microbiota composition, with changes often correlating with weight loss outcomes.

Adopting a calorie-restricted diet combined with increased physical activity can positively shift gut microbiota, particularly increasing beneficial bacteria like Bacteroides fragilis and Lactobacillus. These shifts are more pronounced in individuals who achieve significant weight loss.

High intake of olive oil is significantly associated with reduced risk of all-cause mortality, cardiovascular events, and stroke, whereas general monounsaturated fatty acid (MUFA) intake from mixed sources shows no significant protective effect.

Prioritize olive oil as your primary source of monounsaturated fats for heart health and longevity. Simply increasing total MUFA intake without specifying olive oil may not provide the same protective benefits against mortality and stroke, as mixed sources (including animal fats) showed no significant benefit in this analysis.

Consuming 50g of high alpha-linolenic acid (ALA) flaxseed daily for 4 weeks significantly lowers serum total cholesterol by 9% and LDL cholesterol by 18% in healthy women.

Add 50 grams of ground flaxseed to your daily diet for at least 4 weeks to potentially lower your LDL cholesterol by nearly 20%. You can mix it into yogurt, soups, or bake it into bread. This is safe and tastes fine for most people.

Consuming 50g of flaxseed or 25g of flaxseed mucilage with a carbohydrate meal reduces postprandial blood glucose responses by approximately 27%.

If you eat carbohydrates, add 50g of ground flaxseed or 25g of flaxseed mucilage to your meal. This can reduce your blood sugar spike by about 27%, which is beneficial for metabolic health.

Consuming 50g of flaxseed daily for 4 weeks raises plasma and erythrocyte alpha-linolenic acid (ALA) and long-chain n-3 fatty acids, with bioavailability from ground flaxseed flour being equivalent to flaxseed oil.

To boost your omega-3 levels, eat 50g of ground flaxseed daily. It raises your blood ALA levels just as effectively as taking flaxseed oil capsules, and baking it into foods doesn't create harmful oxidation products.

Dairy intake facilitates weight loss and improves body composition (reducing fat mass, preserving lean mass) during energy restriction in adults, and is associated with a reduced risk of childhood obesity.

If you are trying to lose weight, include dairy in your diet. It helps you feel full, preserves your muscle, and reduces body fat. One serving a day is associated with lower obesity risk in children.

Blending multiple plant protein sources or fortifying them with essential amino acids (specifically leucine) can improve their anabolic quality to match animal proteins.

To get the most out of plant protein, choose products that are either 'blended' (e.g., pea and rice protein mixed) or 'fortified' with leucine. This ensures you get all the essential amino acids needed for muscle building, making them just as effective as animal proteins without needing to eat huge amounts.

Soft drink (sugar-sweetened beverage) consumption is positively associated with increased prevalence of overweight, obesity, and diabetes in low- and middle-income countries.

Reducing sugar-sweetened beverage intake is a key lever for preventing obesity and diabetes in developing economies, as even small increases in consumption correlate with measurable increases in disease prevalence.

Adherence to a Mediterranean diet score is associated with a statistically significant reduction in all-cause mortality, driven primarily by moderate ethanol consumption, low meat intake, and high consumption of plant foods (vegetables, fruits, nuts, legumes) and olive oil.

Adhere to a Mediterranean dietary pattern emphasizing moderate alcohol (if consumed, with meals), low meat, and high intake of vegetables, fruits, nuts, legumes, and olive oil. This pattern is associated with a 14% lower risk of death compared to low adherence. Do not rely on fish, cereals, or dairy as primary drivers of these benefits in this context.

Protein restriction (PR) and specific amino acid restrictions (e.g., methionine, BCAAs) improve metabolic health and extend lifespan/healthspan, likely mediated by mTOR inhibition.

Restricting protein intake, or specific amino acids like methionine or BCAAs, can improve metabolic health and extend lifespan in mice, and is linked to better health outcomes in humans. This suggests that optimizing protein quality and quantity, rather than maximizing it, may be beneficial for longevity.

In healthy young adults, higher carbohydrate intake is associated with increased soluble leptin receptor (sOB-R) concentrations, while higher dietary fat intake is associated with decreased sOB-R, independent of total energy intake and body fat mass.

If you are healthy and maintaining your weight, the type of carbohydrates and fats you eat may influence your soluble leptin receptor levels. Specifically, higher carbohydrate intake is linked to higher sOB-R, while higher fat intake is linked to lower sOB-R. This suggests that macronutrient balance matters for hormonal regulation beyond just total calories.

Higher carbohydrate intake is associated with a decreased Free Leptin Index (FLI), while higher dietary fat intake is associated with an increased FLI, independent of total energy and body fat.

The ratio of free leptin to its binding receptor (FLI) shifts based on what you eat. Eating more carbohydrates tends to lower this ratio, while eating more fat tends to raise it, even if your total calories and body fat stay the same.