Astaxanthin (3,3'-dihydroxy-β,β-carotene-4,4'-dione) — Research Compounds Library | RetatrutideCompare

Xanthophyll carotenoid from Haematococcus pluvialis with strong singlet-oxygen quenching. Studied for skin photoprotection, lipid-peroxidation reduction, and mitochondrial support. Human evidence is suggestive but limited.