Astaxanthin is a unique fat-soluble carotenoid of natural origin. It can be found in a variety of sources, such as micro-algae, or salmon, trout, cray and shellfish. Astaxanthin makes flamingos pink. Ultra Pure Astaxanthin is the ultimate nutrient for the brain - proven to support brain health as you age. This important nutrient also supports cognitive and neurological health, mental clarity, and memory function during aging. Astaxanthin crosses the blood-brain barrier and blood-retinal barrier for maximum effect.