Oxidative stress is the excessive formation of free radicals that causes chronic inflammation affecting DNA, cells and proteins of the body. Free radicals can cause a number of diseases, if not neutralized by antioxidants. For the most part they should get from food.
In a recent study scientists have demonstrated that the carotenoid astaxanthin helps fight free radicals. The effectiveness of its a hundred times more efficient than other antioxidants. Astaxanthin is usually found in seafood red color such as salmon, shrimp and crabs.
In a recent Japanese study, the researchers tested how the addition of astaxanthin helps patients with heart failure. After 3 months of astaxanthin levels of markers of oxidative stress decreased, improved left ventricular function and exercise tolerance.