The science behind the peptide craze Scientific American Ipamorelin Cycle Guide: Optimal Dosage, Timing, and Best Peptide Stack FDA Has BANNED Peptides? Not really, but sorta. #peptides #ipamorelin #cjc1295 The Food and Drug Administration will hold a meeting this summer to consider easing restrictions on more than a half dozen peptide injections, a group of unapproved therapies that have become popular