“A daily multivitamin keeps you healthy.”

In 84 studies of 740,000 people, vitamin/mineral supplements did little or nothing to prevent heart disease, cancer, or early death in well-nourished adults — and beta-carotene raised lung-cancer risk in smokers. Real food still wins.

Backed by a systematic review or meta-analysis — the top of the evidence pyramid. Not medical advice, just what the best evidence says.