Supplement guides
Supplement guides, page 10
Plain-English guides on labels, doses, real prices, free trials and refunds. Written to help you check a product, not to sell you one.
Guides on this page
Do memory supplements work? What the evidence says
What the NIA, a National Academies report, the ginkgo trial and COSMOS found, and how five brain and memory offers score on dose and evidence.
EvidenceDo eye health supplements work beyond AREDS2?
What the AREDS and AREDS2 trials tested, who they covered, and how five eye supplement offers compare with those doses.
EvidenceDo hair, skin and nails supplements work?
Biotin, collagen and hair oils checked against published studies, with five hair, skin and nail offers scored from our reviews.
EvidenceDo women's health supplements work?
Menopause, urinary and thyroid supplements compared with NIH and MedlinePlus evidence, with four offers scored from our reviews.
EvidenceDo heart health supplements work? What the evidence says
What the AHA, NCCIH and FDA say about heart supplements, and how five heart offers score on label transparency and dose.
EvidenceDo energy supplements work? What causes fatigue and what helps
What causes fatigue, what trials show for B vitamins and ashwagandha, and how energy offers score on dose and label transparency.
EvidenceDo dental supplements and oral probiotics work? What the evidence says
What dental authorities and trials say about oral probiotics and xylitol, and how five dental offers score on label and sources.
EvidenceDo libido supplements work? What the evidence says
What research says about libido and testosterone supplements, why the FDA warns about hidden drugs, and what to check before you buy.
EvidenceWhat do blood sugar ebooks and diet programs deliver?
Blood sugar ebooks promise a lot. See what NIDDK and the ADA actually say, how five offers compare, and what to check before buying.
ResearchHow to judge a weight loss diet program or meal plan
Use NIDDK guidance to judge weight loss programs and meal plans: realistic goals, rapid-loss risks, red flags and refund terms.
Guides are general information, not medical advice. Read how we review and our medical disclaimer.