Eagan, Minn.-based Biothera’s Wellmune WGP ingredient was found to offer a 40 percent reduction in upper-respiratory tract infection symptomatic days in long-distance runners, according to clinical research presented at the American College of Sports Medicine. Wellmune WGP also was found to prevent the suppression of the immune system that normally occurs after intense exercise, according to a clinical study published online in the British Journal of Nutrition.