Astaxanthin ek red carotenoid pigment hai jo Haematococcus pluvialis microalga se aata hai. Skincare mein iska use antioxidant properties ke liye hota hai jo free radicals ko fight karta hai. Yeh skin ko oxidative stress aur UV damage se protect karne mein help karti hai. Iska ek strong antioxidant effect hai jo skin ke aging signs ko kam karne mein useful ho sakta hai.