Gym bros love BPC-157, the peptide in the 'Wolverine shot.' Now it could go mainstream.

BPC-157 is a popular peptide used in the buzzy "Wolverine" stack (BPC-157 + TB-500), touted as speeding up injury healing. Drazen Zigic/Getty Images

Dustin Nelson had been dealing with persistent knee pain for more than a month when he decided to give a TikTok treatment a shot.

Literally. He injected BPC-157, a peptide that makes up one half of the so-called " Wolverine shot " — a popular stack promoted as a shortcut to healing, speedily repairing damaged tendons and ligaments.

In recent months, BPC-157 has become the buzzy peptide du jour in fitness and biohacking scenes.…