The exact reason of the cancer formation is unknown, but it is often caused due to internal or external stimuli. The symptoms of various kinds of cancers are different from each other. Some of the home remedies mainly focus on preventing cancer. However, some of the home remedies are mainly for stimulating the immune system of the body. There are also certain food products, which could be taken while patient is on chemotherapy or radiation therapy. Cancer is caused by the malignant growth of cells; it could not be dangerous in the first stage, but it might lead to cancer in other parts of the body.