A recent study at the University of North Carolina at Chapel Hill led by Dr.Seth Crockett tracked over 2,000 people while assigning participants into 4 groups. One group was given calcium supplements, another Vitamin D, a third group took both and the last group took neither for 3-5 years. On follow-up 10 years after the start of the study those who took calcium alone or with Vitamin D were more likely to have developed polyps.
