Algalife Icelandic Astaxanthin is the perfect daily supplement for active adults, with the ability to help reduce soreness, sickness, and sun-damage. Per NASA.gov: "Free radicals cause oxidative damage to tissues and DNA and antioxidants help prevent this damage. Astaxanthin is a potent antioxidant, being 6,000 times more effective than vitamin C, 550 times more effective than vitamin E and 40 times more effective than beta-carotene. A number of studies indicate that this potent antioxidant activity can result in a number of health benefits including: 1) Brain health by preserving cognitive function 2) Male fertility by helping improve sperm quality 3) Reduction in eye fatigue 4) Reduction in atherosclerosis 5) Enhanced memory 6) Demonstrated multiple beneficial effects when it comes to upping exercise performance and preventing injury 7) Enhanced immune response 8) Inhibition of proliferation (rapid increase) and spread of cancer cells 9) Improved skin appearance and health 10) Decreased chronic inflammation 11) Improved joint health and reduced pain associated with rheumatoid arthritis 12) Exhibited a number of anti-aging effects Studies exemplified by the list above suggested that astaxanthin may hold a number of benefits for human health. For that reason, NASA has decided to investigate the potential that astaxanthin may hold for astronaut health on long duration space exploration." https://www.nasa.gov/sites/default/files/atoms/files/introduction_508.pdf