 Many of the studies that I'm referencing here, they're available on PubMed. These are reputable clinical studies conducted by leading researchers around the world that really back the benefits of astaxanthin. By the way, muscle output is better with astaxanthin too. And this comes from astaxanthin research published in the International Journal of Sports Nutrition, November 2011. This was another study done with cyclists. They took four milligrams of astaxanthin