They Call It the 'Wolverine Peptide.' And Everyone from Biohackers to Your Dad Wants It Now. Research chemicals known as peptides, many of them banned by the World Anti Doping Agency and some not approved for human use in the United States, are available with the simple click of Food Colorants Acid Yellow 23, Azorubine, and Acid Red 18 Cause Aggregation and Fibrillation of Proteins ACS Food Science & Technology RFK Jr. promotes peptides. Now the FDA weighs easing limits on the unproven chemicals