Q&A: Should you trust trending peptide injections?

If you could inject yourself with a substance that purports to make you tanner, fitter, and healthier, would you? Many people are saying "yes." Online, social media influencers tout vials of substances with names like BPC-157 or Sermorelin, promising great skin, a lean body, or easy muscle recovery. Scores of followers have started injecting themselves, with the most serious users even buying them from online gray markets.