Magnesium: The Mineral You're Probably Not Getting Enough Of
Nearly half of Americans fall short on magnesium. Here's why that matters for sleep, stress, muscles, and how to fix it without guessing.
Minerals & Supplements
Minerals & Supplements articles and guides
Vitamin D: The Sunshine Vitamin Most People Are Missing
Your body makes vitamin D from sunlight, but most of us aren't making nearly enough. Here's what the research says about testing, dosing, and D3 vs. D2.
Omega-3 and Fish Oil: Cutting Through the Marketing Noise
Fish oil supplements are a $4 billion industry. Here's what EPA and DHA actually do, what the research supports, and what's just slick packaging.
Zinc for Immune Function: Dosage, Timing, and When to Stop
Zinc lozenges at the first sniffle became a pandemic-era ritual. Here's what the science says about zinc, immunity, and the line between helpful and harmful.
Iron Supplements: Who Needs Them and How to Take Them Right
Iron deficiency is the world's most common nutritional shortfall. Supplementing wrong can backfire. Here's how to navigate testing, dosing, and forms.
B Vitamins: What They Actually Do (and Don't Do) for Energy
B vitamins power energy metabolism at the cellular level, but popping a B-complex won't replace sleep. Here's what each B vitamin does and who's actually low.
Calcium Beyond Milk: Sources, Absorption, and Bone Health
Calcium is about way more than drinking milk. Here's how absorption really works, which sources your body prefers, and why the supplement story is complicated.
Vitamin C: Immune Booster, Skin Savior, or Both?
Vitamin C does more than fight colds (barely). From collagen synthesis to iron absorption to antioxidant defense, here's what ascorbic acid actually delivers.
CoQ10: The Supplement Your Heart Might Actually Need
CoQ10 powers your mitochondria and protects your heart. If you're on a statin, over 40, or have heart failure, this one deserves a serious look.
Collagen Supplements: What the Science Actually Supports
Collagen is the most abundant protein in your body and the most hyped supplement on Instagram. Here's what hydrolyzed collagen can and can't do, per the data.
Melatonin: Not a Sleeping Pill — Here's How to Use It Right
Melatonin doesn't knock you out. It tells your brain what time it is. Most people take too much, too late, for the wrong reasons. Here's the fix.
Potassium: The Electrolyte That Does More Than You Think
Potassium keeps your heart beating, your muscles firing, and your blood pressure in check. Most Americans get barely half of what they need.
Selenium: Small Doses, Big Impact on Your Thyroid
Your thyroid holds more selenium per gram than any other organ. Here's why this trace mineral matters for thyroid health and where the dose line is.
Vitamin E: When an Antioxidant Supplement Backfires
Vitamin E was once a darling of the supplement world. Then the clinical trials came in. Here's why more antioxidants aren't always better.
Iodine and Your Thyroid: A Delicate Balance
Iodine is essential for thyroid hormones, but the line between too little and too much is razor-thin. Here's how to get it right.
Vitamin K2: The Unsung Hero That Puts Calcium Where It Belongs
Vitamin K2 doesn't just help with clotting. It activates proteins that direct calcium into bones and out of arteries. Most people have never heard of it.
Chromium for Blood Sugar: Small Mineral, Mixed Evidence
Chromium is marketed as a blood sugar miracle. The evidence tells a more complicated story. Here's who it might help, who it won't, and what the trials show.
Multivitamins: Are They Actually Worth Your Money?
Americans spend $6 billion a year on multivitamins. The evidence for their benefit in well-nourished adults is thinner than you'd expect. Let's talk about it.
Biotin for Hair, Skin, and Nails: Hope or Hype?
Biotin supplements promise thicker hair and stronger nails. The evidence? Thin. But there's a lab test interference problem that's genuinely dangerous.
Supplement-Drug Interactions: What Your Doctor Might Not Mention
Half of Americans take supplements and prescriptions simultaneously. Many interactions are clinically significant. Here are the ones that matter most.