FDA Lifts Ban on Key Peptides Slim 'n Sleek Retatrutide. BPC 157. CJC 1295. Ipamorelin. TB 500. Tesamorelin. They're called "research chemicals." They're sold as cheat codes for healing, fat loss, and muscle growth. Here's what they don't tell you: ALL banned by IPAMORELIN Cellgenic Why RFK Jr. backs peptides but questions vaccines STAT The Peptide Moment: How FDA's Regulatory Reversal Creates Risk and Opportunity for Venture Capital and Private Equity Guidepost Solutions