The peptide world just got loud. Last week, RFK Jr. said roughly 14 peptides may come off the FDA's Category 2 restricted compounding pathway and move back toward legal pharmacy compounding. That Robert F. Kennedy Jr. has announced that 14 out of 19 peptides that were previously restricted will once again be legally compounded. Peptides are short chains of amino acids that play critical Can You Use GHK Cu Peptides with Vitamin C Serum? Expert Guide GHK Cu Peptide for Hair Growth: Science, Benefits, and How It Works