WASHINGTON/PRNewswire/ -- The Council for Responsible Nutrition (CRN), one of the dietary supplement industry's leading trade associations, in consultation with independent osteoporosis and vitamin A experts, responded to the results of a new study on hip fractures from the Nurses' Health Study (NHS) data by reaffirming that the current Upper Limits (UL) for vitamin A set by the Institute of Medicine (IOM) provide an appropriate safeguard for the general population.