It seemed that the more free radicals you have in your body, the faster the aging process becomes. Free radicals are harmful, unstable substances that develop after oxidation, a naturally occurring process of the body. Free radicals are not harmful in themselves. In fact, they can be beneficial. The only problem is they do not distinguish between healthy and harmful molecules so that there is a great possibility that they would also "attack" your other healthy cells, causing massive cellular damage, tissue damage, and eventually resulting in a chronic disease or disorder, such as aging. The human body cannot produce its own supply of natural antioxidants; that is why we have to depend solely on our diet to get the amount of antioxidants our body needs. Groups of well-known natural antioxidants include catechins, coumarins, indoles, and carotenoids. All these are complex compounds found in almost every plant. However, they were surprised to find that besides berry fruits, antioxidants may also come from the most unexpected foods as well. Prior and his colleagues used the most advanced technologies available to tabulate antioxidant levels in more than 100 different types of berry fruits, vegetables, nuts, and spices. Some of the basic food groups that prove to be rich sources of antioxidant vitamins are the following: Breads, cereals, pasta, and starchy vegetables (such as potatoes, yam, squash, etc.) Fruits and vegetables Fat-free milk and low-fat dairy products Lean meat, fish, and poultry Incidentally, if you pattern your diet after this basic food group, you not only ingest a high level of natural antioxidant vitamins, but you also keep fat buildup in your 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. As an antioxidant, the flax oil's lignans can help boost the body's immune system, keeping harmful, disease-causing germs from damaging the cells. These plant hormones are also believed to block the formation of hormone-based tumors. Lignans also boost the productions of a substance attached to estrogen and carries it out of the body.