Astaxanthin Astaxanthin is one of nature's most powerful antioxidants. It protects our bodies against oxidative stress and helps minimise the potential damage of free radicals in the body. The structure of Astaxanthin is both water and fat soluble which allows it to fit precisely into the span of the cell membrane, making it's effects superior to other antioxidants. Oxidative stress occurs when there is an imbalance between the production of free radicals and the ability of the body to neutralise their effects. Because of this, Hawaiian Astaxanthin confers a wide range of health benefits to many body systems.