Compounded "semaglutide" is not FDA approved semaglutide.com FDA Warning Letter to Neil R. Feins, M.D. 2009 05 20 Circare BPC 157: What It Is, What We Know, and Why Its Use for Arthritis Remains Unproven San Diego Orthobiologics Medical Group The FDA has issued warning letters to multiple companies marketing compounded Retatrutide, an investigational drug from Eli Lilly still in Phase II trials. While early studies have shown promising weight loss results, Retatrutide