Carrots (and sweet potatoes, squash, and pumpkin)
cardiovascular disease and cancer. The high intake of carotene has been linked with a 20 percent decrease in postmenopausal breast cancer and up to a 50 percent decrease in the cancers of the cervix, bladder, colon, prostate, larynx, and esophagus. Extensive studies have shown that a diet that includes at least one carrot per day could cut the rate of lung cancer in half.
potatoes contain a higher concentration of carotenes. Sweet potatoes also offer a very
good source of vitamins B6 and C. They are also a good source of manganese, copper, biotin, pantothenic acid, vitamin B2, and dietary fiber. Sweet potatoes contain unique root storage proteins, which have been shown to contain significant antioxidant effects. Since sweet potatoes contain proteins along with their high content of carotenes and vitamin C, they are a valuable food for boosting antioxidants in the body. Studies have shown that unlike many other starchy vegetables, sweet potatoes are an "antidiabetic" food.
niacin. Studies have shown that, due to their carotene properties, winter squash exert a protective effect against many cancers (particularly lung cancer). Diets that are rich in carotenes (especially pumpkins) offer protection against cancer, heart disease, and type 2 diabetes. Studies have also shown that pumpkin seeds are helpful in reducing symptoms of benign prostatic hyperplasia (BPH).