Free radicals are still necessary for life, but in order to prevent yourself from developing these diseases, you need to take action in keeping free radicals at a minimum. Fortunately for us, the body has a number of mechanisms to minimize free radical induced damage and to repair the damage which does occur. Too much LDL in the blood leads to atherosclerotic plaque deposition. Like a previous University of Illinois study in 1999, researchers found in both studies that dark-colored honey, especially buckwheat, provide more protective dietary antioxidant punch than lighter-colored honeys. This proves that while it is still early to say that honey can be a dietary antioxidant, it does point out its vast potential in terms of antioxidant properties. Groups of well-known natural antioxidants include catechins, coumarins, indoles, and carotenoids. All these are complex compounds found in almost every plant. Carotenoids are the largest group of naturally occurring antioxidants, followed closely by indoles and coumarins. Catechins are the natural antioxidants found in the Camellia sinensis plant where we get our green tea, oolong tea, and black tea. The Top 20 list of antioxidants published in the Journal of Agricultural and Food Chemistry shows the ranks of the capacity of berry foods, fruits, and vegetables to interfere with or prevent oxidative processes where free radicals are formed. Ronald L. Prior, a USDA nutritionist and research chemist based in Little Rock, Ark explains that berry antioxidants were ranked according to their total antioxidant capacity. The data on antioxidant vitamins is incomplete for the most part but up to 30 percent of Americans are already taking some form of antioxidant vitamin supplement along with their diet. Due to the lack of sufficient data to support the success of antioxidant vitamins supplement against cardiovascular diseases and other such degenerative illnesses, the American Heart Association does not recommend using antioxidant vitamins supplements. They can be nutrients (vitamins and minerals) as well as enzymes (proteins in your body that assist in chemical reactions). Antioxidants are believed to play an important role in preventing the development of such chronic illnesses as heart disease, stroke, cancer, Alzheimer's disease, Rheumatoid arthritis, and cataracts.