BioAstin Natural Astaxanthin 60 capsules from Nutrex HawaiiNutrex Hawaii BioAstin Natural astaxanthin represents a microalgae innovative. Although not a replacement for the whole food nutrition of Hawaiian Spirulina, BioAstin represents a new class of microalgae products with an antioxidant profile and direct functional applications. Nutrex Hawaii is the first company to have launched BioAstin. And, with an estimated 10,000 species of microalgae, there is a rich variety of products supporting human health