One of the most potent natural antioxidants ever discovered, astaxanthin is what turns salmon, shrimp and flamingos a deep shade of pink. Research suggests it has tremendous promise for maintaining the eyes, fertility, immunity, heart and arteries, the digestive system, muscles and joints, and preventing premature ageing. Higher Natures astaxanthin is obtained from an unpolluted source of marine algae, Haematococcus pluvialis.