Some molecules are unstable. They do not have an even number of electrons, so they are always searching for an extra electron they can "steal" to become stable. This is a normal process, but in the body, it can result in unnecessary damage.

These molecules are called Free Radicals because they float around “free” until they stabilize, and "radical" because there are a wide variety of molecules from which they can take an electron. The problem is that the movement of these "free radicals" doesn’t stop when they snag a molecule. That molecule was "snagged" from somewhere (lung cell) and now that lung cell is missing an electron and, thus, becomes a "free radical". This process can damage many healthy cells in the process.

Some processes brought about by “free radicals” are inevitable, such as aging. But others can be prevented, such as the destruction of DNA or clogging of arteries. “Free radicals” are created by a variety of situations including pollution, cigarette smoking and chemicals.

Their role in certain types of cancer, strokes and heart disease is still being investigated. Preliminarily, low concentrations of “free radicals” have been associated with a reduced risk for heart disease and stroke, but more studies are needed to understand their relationship.

A balancing mechanism for “free radicals” is antioxidants. Antioxidants are found in fruits and vegetables. These amazing phytochemicals stop “free radicals” from causing untold damage. It's better to get antioxidants from a balanced diet, rather than vitamin supplements, because our body can more easily absorb them.