Antioxidants are compounds that are important to the body and used in many metabolic pathways. Normally in the body these compounds provide protection from damaging molecules, known as free radicals. Free radicals cause aging and can be the start of other reactions that lead may even lead to death. Many studies have investigated the benefits of antioxidants as they are found to be beneficial. However most researchers agree that the source of antioxidants is important and the concentration is important as supplements are not very effective and at too high doses antioxidants are dangerous. Researchers agree that Krill Oil is one of the best sources of anti-oxidants.