Probiotics
Live cultures for the gut: what the research shows strain by strain — from antibiotic days to IBS and colic — how to read a label, and who should check first.
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Vitamin E
The antioxidant vitamin in nuts, seeds and plant oils — and in the AREDS eye formula. How much people need, the food sources, what the big heart and eye trials found, and where high doses get risky.
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Vitamin A
The vitamin behind night vision, healthy skin and a strong immune system — found in liver, carrots and sweet potatoes. Here's who runs low, what people take it for, and why more isn't better.
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Potassium and Electrolytes
Potassium is the mineral most of us eat too little of — and the one behind the electrolyte drinks, powders and salt substitutes on every shelf. Here's what it does, who runs low, the foods richest in it, and why the supplement aisle caps it at 99 mg.
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Iodine
Iodine is the mineral your thyroid builds its hormones from, and pregnancy and breastfeeding raise the need more than almost any other nutrient. Members can read who runs low, where it comes from, and why more isn't always better.
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Selenium
A trace mineral your thyroid and antioxidant enzymes depend on, where a little goes a long way and too much causes real harm. Here's who may need it, the best food sources, and the safe upper limit.
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Calcium
Calcium is the main mineral in bones and teeth, and most people can get enough from food. Here's who may need a supplement, which form to pick, how much is too much, and the medicines it clashes with.
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Iron
Iron carries oxygen in every red blood cell, and running low is one of the most common nutrient gaps. Here's who needs a supplement, why low iron always needs a reason, which forms are gentler, and why iron belongs locked away from children.
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Folate (Vitamin B9)
Folate is the B vitamin your body uses to build every new cell, and the one with the strongest "take it before you need it" message in all of nutrition. Here's who needs a supplement, the real story on folic acid vs. methylfolate and MTHFR, and why more isn't better.
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B-Complex
A B-complex bundles the eight B vitamins your body uses to turn food into energy and keep nerves and blood healthy. Here's what each one does, who tends to run low, what the research on stress and energy shows, and why "more" on the label isn't always better.
