A new study suggests getting enough vitamin D and calcium is important for preventing cancers. AdvertisementDietician and cancer prevention expert Cynthia Thomson knows you can't always diet or supplement your way out of getting cancer. Significantly less breast and colon cancer in supplement-takersManufacturers often sell calcium and vitamin D in a single, combined supplement for bone health. Despite the potential heart risks, Thomson still takes her vitamin D and calcium supplements every day. AdvertisementThomson knows that supplements will never erase a person's cancer risk.

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