Astaxanthin is a powerful antioxidant from natural sources with 100-500 times higher antioxidant power than vitamin E. Research suggests it may help with skin aging, eye health, heart health, and brain function, though most evidence comes from lab and animal studies—human trials are still limited.

This was a review of existing research, focusing specifically on human clinical trials to see what astaxanthin actually does in real people, not just in test tubes.

Funding not disclosed in abstract