Which non FDA (United States Food and Drug Administration) approved peptides, such as BPC 157 (Body Protection Compound 157) and TB 500 (Thymosin Beta 500), are likely legitimate for medical use under strict supervision? An FDA Reversal on Peptides Could Open the Market to Unsafe Drugs ProPublica FDA to weigh easing limits on unproven peptides favored by RFK Jr. and other MAHA figures king5.com Peptides are surging in popularity. There's little evidence that they work.