Astaxanthin

natural (algae) · synthetic

A red carotenoid from algae, marketed on antioxidant chemistry. Human trials are small, short, mostly industry-funded, and measure blood markers or skin photos.

last reviewed 2026-08-30

by draft — unverified

GRADE

CLAIM

SPECIES

EFFECT

STUDIES

skin condition & UV resilience — grade C, small effect (human-rct)

lifespan extension — grade D, unclear effect (rodent)

Grade timeline

No grade movement since first review.

Dosing & safety

TYPICAL SUPPLEMENT DOSE4–12 mg/day

DOSES USED IN STUDIES4–12 mg/day

UPPER LIMITnone established

COST SNAPSHOT

No product records for this compound yet.

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