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Supplements & Nutrition
Evidence on supplements, nutrients, powders, and nutrition-related products marketed for health and healthy aging.
Evidence level:
Limited evidence
Supplements & Nutrition
Magnesium for Sleep
Magnesium is heavily promoted for better sleep, but clinical trials show mixed results and any benefit appears modest and uncertain.
From About $10–$30 per month for many magnesium supplements. Cost varies by magnesium form, dose and brand.Read card
Moderate evidence
Supplements & Nutrition
Creatine Monohydrate for Women 40+
One of the better-studied supplements for strength and muscle, but some popular midlife claims go beyond the evidence.
From About $5–$25 per month for basic creatine monohydrate. Premium or specialty formulations may cost more.Read card
Limited evidence
Supplements & Nutrition
Collagen Peptides
Popular for skin, joints, hair and healthy aging—but the evidence varies sharply depending on what you expect collagen to do.
From About $20–$45 per month for many collagen peptide powders, depending on brand, serving size and dose.Read card