Almost all the cells in our bodies must be replaced on a regular basis. Some cells like those that make up the intestinal lining, die out quickly and are replaced every few days. In other parts of the body, the cells live for years before they divide and form new ones. Under special circumstances, such as an injury or an illness, healthy new cells may grow more quickly than usual to replace those that are damaged. When the area is healed, the cells growth slows back down to its normal rate. Normally, the genes that control the growth of the cells automatically know when to start and stop the replication process. But when those genes are mutated---perhaps because life style choice, free radicals, stress, dietary, and environmental factors-----cells may begin to multiply and divide at an unusually fast rate. Eventually these cells form a lump. Sometime the lumps are benign (non-cancerous and relatively harmless), as in the case of warts or uterine fibroids. Other growths, however, are malignant. They pull nutrients away from the healthy tissue that surrounds them, and they interfere with the body's normal functions, to a potentially life-threatening extent. If the tumor continues to grow, its cells may spread via blood vessels or the lymphatic system to other parts of the body, where they form new tumors. Once this process, called metastasis, is underway, there is a risk of dying from the complications that can occur. Although many cancers can be treated successfully when caught early. Word cancer refers to process of uncontrolled cell division, but, technically, it is not in itself , the name of a specific disorder. Instead, cancer is an umbrella term that refers to more than one hundred different kinds of diseases, which are generally named according to the area where a tumor first appears. Scientist classify cancer into four very broad categories listed. Carcinomas affect soft tissue in organs and glands, like skin, the breast, the lungs, and the pancrease. Sarcomas, which are quite rare, occur in solid tissues, especially bone, muscle, and cartilage. Lymphomas appear in the lymphatic system. Leukemias are cancers of the tissues that form blood; these cancers are unusual in that they don't form hard tumors. Environmental carcinogens like cigarette smoke, man-made food, and pollution can have a devastating effect on the body. These toxins encorage the formation of free radicals and experts believe that these unbalanced molecules contribute to uncontrolled cell growth. People with a strong immune system and high levels of antioxidants---the substances tath neutralize free radicals---which are in a better position to starve tumors. Not everyone with weak immune system or that has been exposed to high levels of carcinogens will suffer from cancer. An increasing amunt of research is demonstrating how the effects of unresolved stress may be the root cause for some people. There is a lot of evidence that viral or fungal infections may initate cancer for some people with a susceptible immune system. You must do everything to support your immune system, making sure the liver is detoxified, it is the most crucial organ. Good nutrition and detoxification plan will support your liver. It is very important to provided nutrients to the cells.