Colon cancer is notoriously difficult to treat, partly because chemotherapy can only go so far in eliminating all the cancerous tumors. Usually, a small number of cancer cells are left behind in the large intestine, proliferating until the cancer comes back.
French scientists have now discovered that vitamin A can kill off these cells. Vitamin A can reactive a protein, called HOXA5, that's blocked by mutant cancer cells. When it's reactivated, HOXA5 can turn cancerous cells into normal ones, and stop the cancer from spreading.
Researchers were not only able to do this in mice with colon cancer, but in human tissue samples, too. They also said in a press release that vitamin A would be effective not only in treating colon cancer, but preventing it as well.
Probably the best way to get your As is by eating them. Sweet potatoes especially are rich in the vitamin--but so are leafy greens like spinach, fish, dairy products like eggs and milk, carrots, and cantaloupes. If you aren't a dairy lover and don't eat many fruits and vegetables, take a supplement every day. But stick to those that contain less than 10,000 units a day.
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