Recently, scientists have discovered the substance responsible for many of the health benefits we've been receiving from plants. Fruits and vegetables it seemed contain chemical substances that act on specific, harmful molecules inside our bodies to stop them from damaging our cells. Because these substances work on oxygen by-products called free radicals, they have since come to be known as natural antioxidants. 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. Although antioxidants cannot completely rid our bodies of free radicals, they can however work to retard or minimize the damage caused. Free radicals contain an odd, unpaired electron which causes them to be very unstable and react quickly with other compounds. Because it is the nature of free radicals, which is basically an atom with an unpaired electron, to achieve stability, they will try to do so by capturing the needed electron from other molecules. Antioxidant Enzyme During normal metabolic functions, highly reactive compounds called free radicals are created in the body. However, free radicals may also be introduced from the environment. These compounds are inherently unstable since they have an odd number of electrons. To make up for their shortage in electrons, these free radicals will react with certain chemicals in the body, and in so doing, they interfere with the cell's ability to function normally. Chronic inflammation leads to damage in the cells of our brain, heart, arterial walls, and other body structures which are attributed as the cause of such illnesses as heart disease, Alzheimer's, senility, Parkinson's, rheumatoid arthritis, psoriasis, prostatitis, stroke, and a few other diseases brought by aging. Free radicals at a minimum can be good for the body since their function is to steal electrons from atoms of other molecules, but only if the molecule they're stealing the electrons from are foreign molecules in the first place. If they are healthy molecules, well that's a different story all together.