Browse the evidence

Marine n-3 fatty acid supplementation (specifically EPA at 4g/day) reduces cardiovascular events in high-risk patients with elevated triglycerides, independent of statin therapy.

If you have high triglycerides and are at high cardiovascular risk, ask your doctor about high-dose EPA (4g/day). This specific intervention has been shown to significantly reduce heart attacks and strokes, even for those already taking statins.

Consuming 3 servings of dairy foods per day reduces the risk of osteoporosis by maximizing peak bone mass during growth, slowing age-related bone loss, and reducing fracture risk.

Eat 3 servings of dairy every day to protect your bones. This means 3 cups of milk, yogurt, or cheese. If you are sensitive to lactose, choose low-lactose options or take a lactase enzyme with your dairy. Prioritize low-fat or non-fat versions to align with current guidelines.

Daily beta-alanine supplementation of 4-6 grams for 2-4 weeks significantly increases muscle carnosine concentrations, acting as an intracellular pH buffer to attenuate exercise-induced acidosis.

Take 4-6 grams of beta-alanine daily, split into doses of 2 grams or less, for at least 4 weeks to maximize muscle carnosine stores. Expect harmless tingling (paraesthesia), which can be reduced by using sustained-release versions or smaller individual doses. This loading phase is necessary to gain the buffering benefits.

Beta-alanine supplementation improves exercise performance in high-intensity tasks lasting between 60 seconds and 4 minutes, with the most pronounced effects on open-endpoint tasks (time to exhaustion) and fixed-endpoint time trials.

If your sport involves high-intensity efforts lasting 1-4 minutes (e.g., 800m run, rowing sprints, HIIT), supplement with 4-6g of beta-alanine daily for 4 weeks. It will likely improve your time to exhaustion or time trial performance modestly. It will not help short sprints or long-distance endurance.

Consumption of olive oil containing at least 5 mg of hydroxytyrosol and its derivatives per 20g provides a cause-and-effect protection of blood lipids from oxidative stress, specifically by decreasing circulating oxidized LDL particles.

To get the heart-protective benefit of olive oil polyphenols, you need to eat about 1.5 tablespoons (20g) of high-quality extra virgin olive oil daily. Crucially, the oil must contain at least 5mg of hydroxytyrosol and its derivatives. This isn't just any olive oil; look for high-polyphenol varieties. Use it to replace less healthy fats in your diet rather than adding it on top of your current calories.

Vegetarians are at a significantly higher risk of Vitamin B12 deficiency compared to non-vegetarians, with deficiency rates ranging from 11% to 90% depending on the demographic subgroup.

If you are vegetarian, especially if you are pregnant, elderly, or raising children, you should monitor your Vitamin B12 levels. Deficiency is common and can be masked by high folate intake. Do not assume your diet provides enough B12; consider using nori or supplements to prevent long-term health risks like neuropathy and anemia.

Consuming 2 grams per day of phytosterols (PS) lowers LDL-C by 6-12% through the inhibition of intestinal cholesterol absorption.

To lower LDL cholesterol, consume 2 grams of phytosterols daily, split into two doses with meals. This can be achieved through fortified foods like margarine, yogurt drinks, or supplements. This intervention lowers LDL-C by 6-12% without affecting HDL-C.

The DASH diet (rich in fruits, vegetables, low-fat dairy, fiber, and minerals) produces a potent antihypertensive effect, reducing systolic and diastolic blood pressure more effectively than control diets or single-nutrient interventions.

Adopt the DASH diet: eat 8-10 servings of fruits and vegetables daily, 3 servings of low-fat dairy, and ensure you get enough fiber (31g) and minerals (potassium, magnesium, calcium). This dietary pattern significantly lowers blood pressure, especially if you are hypertensive, and is not overly restrictive.

Supplemental calcium (≥1200 mg) alone or combined with vitamin D (≥800 IU) reduces the risk of osteoporotic fractures in adults aged 50 and older.

If you are 50 or older, taking at least 1200 mg of calcium and 800 IU of vitamin D daily can reduce your risk of breaking a bone. This is a proven, relatively inexpensive way to protect your skeletal health as you age.

Higher compliance rates and higher doses of calcium (≥1200 mg) and vitamin D (≥800 IU) significantly increase the fracture risk reduction.

To get the most benefit, aim for at least 1200 mg of calcium and 800 IU of vitamin D daily. Taking these doses consistently is more effective than taking lower doses irregularly.

Calcium and Vitamin D supplementation reduces the rate of bone loss at the hip and spine in adults aged 50 and older.

Supplementing with calcium and vitamin D helps slow down the natural loss of bone density in your hips and spine, which is a key factor in preventing fractures.

Calcium supplementation (1,000-1,200 mg/day) combined with Vitamin D reduces the risk of osteoporotic fractures and improves bone mineral density in postmenopausal women.

If you are a postmenopausal woman at risk for osteoporosis, take 1,000-1,200 mg of calcium daily along with 800 IU of Vitamin D. This combination has been shown to significantly reduce your risk of fractures. Consult your doctor to determine the right dose for you.

Consumption of yoghurt and fermented milk products is associated with reduced cardiovascular disease risk factors, including lower total cholesterol, LDL cholesterol, triglycerides, and blood pressure.

Include yoghurt or fermented milk in your diet to support heart health. High intake is linked to lower cardiovascular mortality and improved cholesterol profiles. Whole-fat yoghurt may offer metabolic benefits comparable to or better than low-fat options.

Using nutrient densities (mg per 1,000 kcal) improves the measurement accuracy of both potassium and sodium compared to absolute intake, and the Sodium:Potassium Ratio (SPR) is measured significantly better than sodium alone.

When tracking sodium, do not just look at the total milligrams. Calculate the Sodium:Potassium Ratio (SPR) or look at sodium density (mg per 1,000 kcal). These metrics are measured much more accurately by self-report instruments than absolute sodium values, reducing the error inherent in memory-based food logging.

Lowering LDL cholesterol with statins reduces major cardiovascular events in Type 2 Diabetes patients, whereas pharmacological interventions to raise HDL cholesterol or lower triglycerides have not shown consistent beneficial effects on cardiovascular risk.

Take statins to lower LDL cholesterol as prescribed. Do not expect drugs that raise HDL or lower triglycerides to protect your heart, as evidence does not support their benefit for cardiovascular outcomes.

Marine n-3 PUFAs (EPA/DHA) exert anti-inflammatory effects by inhibiting NF-kB activation, activating PPAR-gamma, and binding to GPR120, leading to reduced production of pro-inflammatory cytokines and eicosanoids.

This paper explains the biological 'how' behind Omega-3s: they change cell membrane composition and interact with specific receptors (GPR120, PPAR-gamma) to turn down inflammatory signaling (NF-kB). This is useful for understanding why they work, but does not dictate a specific dosing protocol for users.

Higher body mass index (BMI) causally leads to lower circulating 25-hydroxyvitamin D [25(OH)D] concentrations, primarily due to sequestration of vitamin D in adipose tissue.

If you have a higher BMI, your body stores more vitamin D in fat tissue, leaving less in your blood. This means standard vitamin D doses might not be enough for you. You likely need higher doses to reach healthy blood levels, and simply taking a standard supplement may not correct a deficiency if your weight is not addressed.

In a general population, 1 g/day marine n-3 supplementation significantly reduces the risk of total myocardial infarction.

While fish oil didn't prevent all heart issues, it did significantly lower the risk of heart attacks in this study. It may be worth discussing with your doctor, especially if you have other risk factors.

Serum 25-hydroxyvitamin D [25(OH)D] is the superior biomarker for assessing Vitamin D status compared to calcitriol, as it reflects both sun exposure and dietary intake and correlates better with physiological outcomes like calcium absorption.

When getting your Vitamin D checked, ensure your doctor orders '25-hydroxyvitamin D' (25(OH)D), not 'calcitriol' or '1,25-dihydroxyvitamin D'. The latter is not a reliable indicator of your body's Vitamin D stores and can be misleading.

Serum 25-hydroxyvitamin D [25(OH)D] is the best indicator of vitamin D nutritional status, reflecting contributions from diet and dermal production, and should be standardized using programs like VDSP.

To check your Vitamin D status, ask for a serum 25-hydroxyvitamin D [25(OH)D] test. This is the gold standard. Ensure your lab participates in standardization programs like VDSP for accurate results.

Global prevalence of vitamin D deficiency (serum 25(OH)D <30 nmol/L) is 15.7%, with significantly higher rates in high-latitude regions, winter-spring seasons, females, and lower-middle-income countries.

Vitamin D deficiency is a global issue affecting roughly 16% of adults, with higher risks in winter, at high latitudes, and for women. To mitigate this, prioritize Vitamin D supplementation or consumption of fortified foods, especially if you live in northern regions, wear covering clothing, or have limited sun exposure. Regular testing of serum 25(OH)D levels is recommended to ensure adequacy.

Vitamin D supplementation (specifically Vitamin D3) does not significantly reduce all-cause mortality in adults compared to placebo, although it significantly reduces cancer mortality by 16%.

Taking Vitamin D supplements will not help you live longer, according to this large review of 75,000+ people. However, it may help reduce the risk of dying from cancer. Focus on maintaining healthy levels for bone health or other indicated reasons, but do not expect it to extend your lifespan.

Dietary phytate is a potent inhibitor of zinc absorption, significantly reducing fractional zinc absorption when the phytate:zinc molar ratio exceeds 15.

If your diet is plant-based, high phytate content (found in grains and legumes) can block up to 45% of zinc absorption if the phytate:zinc ratio is high. To improve zinc status, consider soaking, fermenting, or sprouting grains/legumes to reduce phytate, or include animal products which have higher zinc bioavailability.

The health benefits attributed to ellagitannin-rich foods (pomegranates, walnuts) are primarily driven by Urolithin A, but these benefits are conditional on the individual's gut microbiota composition (metabotype).

Eating pomegranates or walnuts is healthy, but your gut bacteria must convert them into Urolithin A for maximum benefit. If you are a 'non-producer' (UM-0), you might not get these specific benefits. Testing your metabotype or using Uro-A supplements can ensure you get the intended effects.