Evidence-based guides on vitamins, minerals, botanicals and more. Jump in with a common goal below, or refine by type and concern using the filters.
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Evidence-based review of 5-HTP supplements, including uses, effectiveness, forms, dosing, safety, side effects, interactions, and US vs EU differences.
Evidence-based guide to alpha-lipoic acid supplement uses, diabetic neuropathy research, dosage, side effects, interactions, and safety.
A science-based review of ashwagandha for stress, sleep, dosage, side effects, liver risk, thyroid concerns, and EU/US regulation.
Ashwagandha may modestly improve stress, anxiety symptoms, and sleep in some adults when the extract, dose, and safety profile fit the user.
Ashwagandha may offer modest short-term benefits for stress and sleep, but evidence is extract-specific and many broader claims remain weak.
Evidence-based guide to astaxanthin supplements covering skin and antioxidant effects, dosage, forms, safety, and EU/US regulatory status.
Evidence-based review of Bacopa monnieri covering memory and attention benefits, forms, dosage, safety, interactions, and EU/US regulatory notes.
Science-based review of BCAA and EAA supplements covering muscle recovery, protein synthesis, dosage, safety, and plant versus animal protein sources.
Evidence-based guide to beetroot nitrate supplements covering exercise benefits, blood pressure effects, forms, dosage, safety, research, and EU/US rules.
Evidence-based guide to berberine supplements covering blood sugar and lipid effects, dosage, side effects, interactions, weight claims, and EU/US rules.
Evidence-based guide to beta-alanine: how it works, exercise benefits, dosage, forms, side effects, food vs supplements, safety, and regulation.
Evidence-based review of beta-carotene supplements, vitamin A conversion, limited routine benefits, smoker risks, and why AREDS2 replaced it.
Evidence-based guide to biotin supplements covering deficiency, hair and nail claims, dosage, lab test interference, safety, and EU/US status.
Evidence-based guide to boron supplements covering uses, forms, dosage, safety limits, joint comfort research, hormone claims, and EU/US regulatory status.
Evidence-based guide to caffeine supplements covering alertness, exercise performance, forms, dosing, safety risks, interactions, and source differences.
Evidence-based review of calcium’s benefits, deficiency, dosage, supplement forms, safety, interactions, and when supplements may help.
Astaxanthin may modestly support skin resilience to UV stress and moisture, but it is not sunscreen. Learn what the evidence says and how to use it safely.
Beta-carotene may modestly reduce UV-related skin redness after weeks of intake, but it is not sunscreen and high-dose supplements carry important safety cautions.
Carotenoids may modestly help skin resist UV redness after weeks of daily intake, but they are not sunscreen. The article reviews the evidence, dosing ranges and safety cautions.
Vitamin B5 has a plausible link to acne, but evidence is limited. Learn what pantothenic acid may do, what studies show, and key safety cautions.
Learn what chloride does in the body, common food and supplement sources, electrolyte uses, dosage guidance, safety risks and evidence gaps.
Evidence-based guide to choline supplements covering benefits, deficiency risk, dosage, safety, forms like citicoline, and how food sources compare.
Evidence-based guide to chromium supplements covering blood sugar, weight loss, dosage, side effects, interactions, research findings, and EU/US status.
Citrulline malate may offer a small acute exercise benefit, but evidence is mixed. It appears most relevant for repeated hard efforts rather than broad performance gains.
Evidence-based review of citrulline malate and L-citrulline, including benefits, dosage, exercise performance, safety, food sources, and supplement form differences.
Evidence-based review of CoQ10 supplements covering benefits, dosage, side effects, interactions, bioavailability, and EU/US regulatory status.
Science-based guide to collagen supplements covering skin and joint benefits, forms, dosage, safety, and which claims current evidence supports best.
Evidence-based guide to copper supplements, including deficiency risk, dosage, forms, safety, zinc interactions, and when supplementation is actually justified.
Evidence-based guide to cordyceps supplements covering benefits, dosage, side effects, interactions, species differences, and EU vs US regulation.
A science-based review of creatine monohydrate covering benefits, dosage, safety, cognition, product quality, and where the evidence is strongest or more uncertain.
Evidence-based guide to digestive enzymes covering uses, forms, dosing, safety, source differences, and where research is strong or weak.
A balanced review of echinacea for colds and immune support, including what the evidence shows on effectiveness, dosage, safety, interactions and quality.
Electrolytes for athletes can help in heat, heavy sweat and long sessions. Learn which ingredients matter and when water is enough.
Elemental magnesium is the actual magnesium dose per serving. Learn to read Supplement Facts labels without confusing magnesium form, compound weight, and amount.
Evidence-based guide to folate, folic acid, and 5-MTHF, including pregnancy use, dosage, safety, interactions, and supplement regulation.
Evidence-based guide to GABA supplements for sleep, stress, and blood pressure, including research on dosage, side effects, safety, and EU/US regulatory status.
Evidence-based guide to garlic supplements covering forms, blood pressure and metabolic effects, dosage, safety, and important food-versus-extract differences.
Evidence-based guide to ginkgo biloba covering dementia research, dosage, side effects, interactions, regulation, and quality.
Evidence-based guide to glucosamine for joint health covering forms, osteoarthritis benefits, dosage, safety, and regulatory differences.
Evidence-based guide to glycine supplements covering sleep benefits, forms, dosage, food sources, safety, regulation, and current research.
Evidence-based guide to green tea extract covering EGCG, cholesterol and weight-loss effects, dosage, liver risk, interactions, and EU/US rules.
Green tea may modestly help inflammatory acne when used topically. Oral extracts are less reliable and require more caution, especially at higher catechin doses.
Evidence-based guide to oral hyaluronic acid covering skin and joint benefits, studied doses, safety, forms, and how supplements differ from injections.
Evidence-based guide to iodine supplements covering deficiency, thyroid function, pregnancy guidance, dosage, safety risks, and EU-US regulatory differences.
Science-based guide to iron supplements: benefits, absorption, dosage, forms, side effects, interactions, deficiency, and safety.
Evidence-based guide to L-carnitine supplements: forms, benefits, dosage, deficiency treatment, side effects, interactions, and research limits.
Evidence-based review of L-theanine for stress, sleep, cognition, dosage, safety, interactions, and EU/US regulatory status.
Evidence-based lecithin review covering choline content, supplement forms, clinical evidence, dosage, safety, and why source and formulation matter.
Evidence-based guide to Lion's mane supplements covering uses, product forms, human studies, dosage, safety, side effects, and EU/US regulation status.
Lycopene may modestly reduce UV-related redness and skin stress after weeks of intake, but it is not sunscreen or a sunburn treatment.
Evidence-based guide to magnesium benefits, forms, dosage, side effects, interactions, and the uses most strongly supported by clinical research.
Evidence-based guide to manganese benefits, food sources, supplement forms, dosage, deficiency risk, safety, interactions, toxicity, and supplement use.
Evidence-based review of melatonin for sleep, jet lag, and circadian disorders, with dosage, safety, interactions, product quality, and EU/US regulation.
Evidence-based review of milk thistle covering liver claims, silymarin forms, bioavailability, safety, dosage, interactions, and product quality.
Evidence-based guide to NAC supplements covering uses, dosage, side effects, interactions, respiratory research, PCOS, mental health, and current US/EU rules.
Evidence-based guide to niacin supplements: forms, uses, dosing, lipid effects, safety risks, and EU/US regulation.
Nicotinamide may help some sun-damaged skin, especially in high-risk adults, but it is not a sunscreen replacement.
Evidence-based guide to EPA and DHA omega-3s covering benefits, sources, dosage, triglycerides, absorption, contaminants, and safety.
Omega-3 may help inflammatory acne, but evidence remains limited. This article compares EPA, DHA, fish oil, and algae oil, and reviews dosing, safety, and current guideline caution.
Evidence-based review of Panax ginseng covering benefits, effectiveness, dosage, safety, drug interactions, product quality, and practical considerations.
Evidence-based guide to passionflower supplements covering benefits, forms, dosage, safety, interactions, regulation, and current research limits.
An evidence-based review of peptide supplements, focusing on collagen-based products, skin and joint outcomes, dosing, safety, regulation, and where broader peptide claims exceed the evidence.
Evidence-based phosphatidylserine guide covering memory support in older adults, dosage, safety, source differences, and EU/US regulatory status.
Evidence-based guide to phosphorus supplements: when they help, forms, absorption, kidney cautions, and why most adults may not need extra phosphorus.
Polypodium leucotomos may modestly reduce UV-related redness, but it is not sunscreen. This article reviews the evidence, common doses, limits and safety.
Potassium is an essential mineral and electrolyte involved in nerve signaling, muscle contraction, heart rhythm, and blood pressure. The article explains deficiency, evidence, and safety.
Evidence-based guide to potassium supplements, food sources, blood pressure benefits, forms, dosage ranges, kidney stone use, safety risks, and regulation.
Evidence-based guide to prebiotics covering forms, bowel and microbiome benefits, dosage, side effects, and key EU and US rules.
Evidence-based guide to probiotic supplements covering supported uses, strain differences, safety, storage, and how to choose a quality product.
Evidence-based guide to quercetin supplements covering forms, modest blood-pressure benefits, dosage, bioavailability, safety, interactions, and EU/US regulatory status.
Red-light therapy for acne is biologically plausible, but evidence is mixed. The article explains how it may work, what studies show, and why guidelines remain cautious.
Evidence-based review of reishi mushroom supplements covering benefits, dosage, safety, interactions, and why product quality matters.
Evidence-based guide to resveratrol covering food sources, supplement forms, potential benefits, dosage ranges, safety, interactions, and real-world limits.
Evidence-based guide to rhodiola rosea covering stress and fatigue research, dosage, side effects, product quality, and EU/US regulation.
Evidence-based guide to SAM-e covering mood, osteoarthritis, liver research, dosage, side effects, interactions, and why formulation matters.
Evidence-based review of saw palmetto supplements covering urinary symptoms, hair loss evidence, extract types, safety, dosage, and regulation.
Selenium once looked promising for cancer prevention, but SELECT and later reviews found no benefit and cautioned against high intake.
Scientific review of selenium supplements covering thyroid uses, dosage, upper limits, safety, and EU/US regulation. It concludes that benefits mainly depend on low selenium status.
Explains selenium’s essential roles, who may benefit from supplements, signs of deficiency, food sources, and why high-dose use can be risky.
Evidence-based guide to sodium supplements covering benefits, dosage, excess intake risks, oral rehydration, exercise uses, safety, and EU/US rules.
Evidence-based guide to St John’s wort covering uses, effectiveness, extract forms, dosage, side effects, and major medication interactions.
Evidence-based guide to taurine supplements covering benefits, dosage, food sources, cardiometabolic research, safety, interactions, and EU/US rules.
Evidence-based guide to turmeric and curcumin supplements: benefits, osteoarthritis evidence, dosage, bioavailability, liver risk, interactions and regulation.
Evidence-based guide to tyrosine for stress-related cognition, dosage, safety, and the difference between L-tyrosine and N-acetyl L-tyrosine.
Vitamin A is linked to acne treatment, but retinoid medicines are the proven option. The article explains which forms help, how they work, and the main safety risks.
Evidence-based guide to vitamin A supplements covering retinol, beta-carotene, benefits, dosage, upper limits, safety risks, and what research shows today.
Evidence-based guide to vitamin B1 (thiamine): deficiency, supplement forms, dosage, safety, food sources, and what research really supports.
Evidence-based review of vitamin B12 uses, deficiency treatment, dosage, safety, and EU/US supplement rules.
Evidence-based guide to riboflavin covering deficiency, migraine prevention, dosage, supplement forms, safety, and EU/US rules.
Evidence-based guide to vitamin B5 supplements: pantothenic acid, pantethine, and dexpanthenol forms, dosage, safety, and what the research supports today.
Evidence-based guide to vitamin B6 supplements covering uses, dosage, deficiency, pregnancy nausea, safety limits, interactions, and research.
Evidence-based review of vitamin C’s established roles, dosage, safety, supplement forms, and the limits of common-cold and disease-prevention claims.
Evidence-based guide to vitamin D covering deficiency correction, bone health, D2 vs D3, dosage, safety, and where broader disease-prevention claims fall short.
Vitamin D may modestly help inflammatory acne in people with low vitamin D, but evidence remains limited and it should not replace standard acne treatments.
Evidence-based guide to vitamin E supplements covering forms, dosage, deficiency risk, safety, and the specific uses that studies actually support.
Evidence-based review of vitamin K and K2: K1, MK-4, MK-7, bone and clotting roles, dosing, safety, and warfarin interactions.
A beginner-friendly guide to electrolytes: what they do for hydration, muscles, nerves and heart function, when electrolyte drinks help, and how to choose a useful product.
Beta-alanine helps muscles make carnosine for hard exercise. The article explains its sports-performance benefits, food sources, dosing, side effects, and safety limits.
Learn what beta-carotene does, how it supports vitamin A needs, key food sources, deficiency signs, supplement cautions and which benefits are proven.
Explains what citrulline malate is, how it may affect nitric oxide and exercise performance, its food sources, and the main safety cautions.
Explains what L-citrulline is, how it affects nitric oxide and blood flow, possible exercise and circulation benefits, food sources, dosing questions, and key safety cautions.
L-theanine is a tea amino acid linked with relaxation, sleep quality and focus. The article explains its benefits, food sources, dose ranges and safety limits.
Explains why soil selenium differs worldwide, how it changes selenium in staple crops, and when food origin matters for dietary selenium intake.
Zinc for acne may help some inflammatory breakouts, but evidence is mixed. Learn the best-studied forms, dosing clues and safety cautions.
Evidence-based guide to zinc supplements covering benefits, forms, dosage, upper limits, cold research, AMD, diarrhea, safety risks, and interactions.
