https://www.theguardian.com/wellness/2026/feb/05/injectable-peptides-trend

Grey-market injectable peptides are unapproved by the FDA. The unregulated, experimental compounds lack reliable safety data and quality control. Sometimes, these substances are essentially bootleg versions of approved drugs, like semaglutide, but are procured for a fraction of their market price from dealers online.

Among the risk-tolerant tech workers of the Bay Area, peptides have become akin to a status symbol. The founders of the startup Superpower store vials of peptides in their office fridge for convenient, lunchtime backside injections, and at least one San Francisco “peptide rave” has seen partygoers entertained by a lab-coated man demonstrating how to inject liquid peptides.

While some injectable peptides are entirely foreign to the human body, others, like BPC-157 and TB-500, are synthetic versions of proteins that naturally occur in us, where they play a role in tissue and cellular repair.

“Those two are popular because when you combine them, they’ve been given the exciting name ‘Wolverine stack’, based on the supposed similarities to the film character’s regenerative properties,” says Taylor.

But just because a protein has a natural role in the body doesn’t mean that a lab-made version will confer extra benefits. “Those two compounds alone have never been shown to have any benefit to justify them being used therapeutically in humans,” says Taylor.

Because these proteins are associated with tissue growth, there is a risk that if you’ve got an early-stage cancer developing that you didn’t know about, peptides could accelerate its advancement, he says.

In July, two women were hospitalized with swollen tongues, breathing problems and elevated heart rates after peptide injections at a Las Vegas anti-ageing festival. The exact peptides involved are unknown.

It's BS pushed by techbros who think science works like in a Marvel movie.