Oxygen is essential for life, it is the element that causes burning glucose and fat to your body heat and energy. But oxygen has negative effects, because in the process of oxidation and free radicals are produced. These free radicals act on other molecules, converting them and they in free radicals, thus stopping normal operation. This can lead to mass destruction of cells, tissues or causing degradation of degenerative diseases like cancer, rheumatoid arthritis, atherosclerosis, Alzheimer's and so on.
Fortunately, the body has a natural protective mechanism that fight these free radicals. Antioxidants are chemicals found naturally in fruits and vegetables. These antioxidants act on free radicals, neutralizing them.
Among the plants that contain antioxidants and are Camellia sinensis plant from which green and black teas are produced. The antioxidant effects of green tea is attributed to this policatehinelor, which have a strong antioxidant. Of all the flavonoids, catechins are considered the most powerful antioxidant. Besides tannins and vitamins A, C and E, green tea there and other substances known for their antioxidant effects.
There is a special catechins, known as epigallocatechin Gallate, which was declared by many researchers as being extremely important antioxidant role, which helps prevent cancer. In addition to antioxidant properties, green and black teas are also protective of the heart, neuroprotective and antimicrobial.