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For many years, vitamin D was boring--even to doctors. Because it was considered good for bones and not much else, multitaskers like vitamin A, B vitamins and vitamin E hogged all the press. But recent studies have thrust this long-neglected nutrient into the spotlight. Scientists now think vitamin D may affect everything from diabetes to cancer. They're also finding that many people don't have enough of it.

Parasites in humans can cause a number of problems, including diarrhea, fatigue, skin rash, nervousness, asthma, anemia and more. In can be transmitted into the human body from bug bites, pets, produce fertilized with human waste, skin to skin contact with unwashed hands