FDA to weigh easing limits on unproven peptides RFK Jr.'s peptide push could unleash risky drugs STAT First Opinion BPC 157 aka Wolverine. This peptide is not FDA approved, but it is very popular among the biohacking population. Ashley explains the science behind it, but remember, it doesn't have human data yet, so RFK Jr. promotes peptides. Now the FDA weighs easing limits on the unproven chemicals Have you thought about taking peptides that aren't approved by the FDA? Think again. CBS News' chief medical correspondent, @drlapook, shares a cautionary tale from medical history about why testing medications is