Cancer is a disease in which cells in some area of the body begin to multiply out of control, sometimes invading neighboring tissue and spreading to distant areas of the body. The proliferation of non-functioning cancer cells can interfere with the function of any organ, leading to complications and sometimes death. Most cancers form one of more lesions called tumors, but some forms of cancer, such as leukemia, do not.

Medical science has not yet conquered all forms of cancer, but has developed effective treatments for some types. Tumors are often removed through surgery or shrunk through radiation. Chemotherapy, the administration of medications that affect cancer cells, can destroy tumors or halt their growth. Regular health care screenings, such as mammograms and Pap smears for women, and prostate exams for men, can often detect cancers in the early, most treatable stage. Patients diagnosed with cancers that have no known, effective medical treatments may wish to participate in clinical trials of new treatments. Herbal remedies may be effective for some individuals.

Excellent nutrition and a healthy lifestyle can play a key role in preventing cancer. Bioflavonoids and antioxidants scavenge "free radicals" that can alter normal cells. Because high-fat diets have been linked to both breast and colon cancer, eating a healthy diet that includes many fresh fruits and vegetables can help prevent those cancers. Smoking can cause lung cancer, as well as cancers in other parts of the body. Quitting cigarette smoking greatly reduces the risk of cancer.

Patients undergoing cancer treatment should consult their physicians before using any nutritional supplements, because the supplements and medications may interact.

Recommended vitamins:

• Vitamin A: 50,000 IU daily
• Vitamin C: 2,000 mg, three times daily
• Vitamin E: 400 to 500 IU, twice daily
• Carotenoids

Recommended minerals:

• Selenium: 100 to 200 mcg daily

Recommended nutrients:

• Coenzyme Q10: 200 mg each morning
• Amino acids
• Echinacea
• Mushrooms