Astaxanthin is a carotenoid antioxidant found in salmon, shrimp, and microalgae — 10-100x more potent than other carotenoids in singlet oxygen quenching. Our research shows moderate evidence for oxidative stress reduction, skin UV protection, and exercise recovery. Remarkably safe with virtually no drug interactions.
Astaxanthin is a xanthophyll carotenoid responsible for the red-pink color of salmon, trout, shrimp, and flamingos. Unlike beta-carotene and lycopene, astaxanthin spans the entire cell membrane (both inner and outer leaflets), providing antioxidant protection across the full lipid bilayer. It quenches singlet oxygen 6,000x more effectively than vitamin C and 550x more than vitamin E (PMID: 21457902).
Most supplemental astaxanthin is derived from Haematococcus pluvialis microalgae. Synthetic astaxanthin exists but lacks the esterified form found in nature.
Astaxanthin may mildly lower BP; additive effect
Carotenoids may modulate immune function; theoretical
Astaxanthin inhibits 5-alpha reductase in vitro; clinical significance unclear
Not Prohibited
Fassett RG, Coombes JS. Astaxanthin: a potential therapeutic agent in cardiovascular disease.
Davinelli S et al. Astaxanthin in skin health, repair, and disease: a comprehensive review.
Tominaga K et al. Protective effects of astaxanthin on skin deterioration.
Park JS et al. Astaxanthin decreased oxidative stress and inflammation in overweight subjects.
Reviewed by the Scan Dose Research Team and Clinical Advisory Board | Last updated: April 2026
Not medical advice. Based on published clinical research and systematic reviews.