 Yeah, you definitely need to do your homework when choosing supplements. And that's what I did. Astax uses four milligrams of the world's most clinically researched natural form of astaxanthin called Astareal. Sherry Tarkos, pharmacist and author, is with us here on the program. Sherry, we learned today that astaxanthin is 6,000 times more powerful by this one measurement of antioxidant activity when compared to vitamin C.