Supplement usage stayed strong in 2015—a reported 68 percent of U.S. adults take dietary supplements. That’s according to results from the 2015 Council for Responsible Nutrition’s (CRN) Consumer Survey on Dietary Supplements, conducted by Ipsos Public Affairs. Harvey Kamil, chairman of CRN and vice chairman of NBTY, spoke to INSIDER on the state of the supplement industry at CRN’s 2015 Symposium for the Dietary Supplement Industry in Palm Springs, California.