One grapefruit supplies about 60 percent of the RDA for vitamin C, but the antioxidant power doesn't end there.

Grapefruit also contains beta-carotene and lycopene (found in red and pink grapefruit), as well as flavonoids, all of which may protect against bladder, cervical, and pancreatic cancers.

Grapefruit also contains the citrus oil limonene, which has been shown to help stop tumor growth and inhibit the formation of new tumors.

Pectin, the soluble fiber in the pith of the grapefruit, is an excellent heart protector.

Many people think that if certain foods are good, a lot is better.
This is not always the case, and high doses of certain food are actually toxic.

Read about the healthy food, research the vitamins and minerals and check with your health care provider if you are unsure about how much to eat and how much may be too much.

The best way to get the daily requirement of 13 essential vitamins is to eat a balanced diet that contains a variety of foods and take a "Standardized" (quality) multivitamin supplement.