Supplement guides
Supplement guides, page 4
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 passionflower and lemon balm calm anxiety or help sleep?
What trials found for passionflower and lemon balm, the doses used, and how calming supplement labels compare.
EvidenceDoes oral GABA work for stress and sleep?
Small trials, an unsettled blood-brain barrier question, and labels that bury the GABA dose in blends. Here is what the evidence supports.
EvidenceDo adaptogen blends deliver the doses studies used?
Eleuthero trials used 800 to 1,200 mg a day. Here is how real adaptogen labels compare, and how to check one yourself.
EvidenceDo cordyceps, reishi and chaga supplements have human evidence?
Small trials, gram-level doses and blends with no amounts. What cordyceps, reishi, chaga and lion's mane research actually tested.
LabelsFruiting body or mycelium: how to read a mushroom supplement label
Fruiting body, mycelium or mycelium on grain: what each means, why beta-glucan and starch matter, and a checklist for reading a mushroom label.
EvidenceDo PQQ and NAD booster supplements work? What trials show
PQQ, NR and NMN trials, the doses used, who funded them, and how three supplements we reviewed compare with the research.
EvidenceDo spermidine and fisetin extend healthy life in humans?
Mouse lifespan data, a spermidine cohort and a null 12-month trial: what the evidence shows and how three longevity supplements compare.
EvidenceWhat does astaxanthin do and how much do studies use?
What eye and skin studies of astaxanthin actually used and found, and how to check a supplement label for the dose.
EvidenceDo caralluma, forskolin or irvingia help weight loss?
What reviews and trials say about caralluma, forskolin and irvingia for weight loss, and how real products dose them.
EvidenceDoes chlorogenic acid from green coffee help weight loss?
Meta-analyses, the retracted green coffee trial and FTC cases, and how fat-burner labels hide chlorogenic acid doses.
Guides are general information, not medical advice. Read how we review and our medical disclaimer.