Is the peptide craze backed by science? The promise behind the hype

Peptides have become the latest cure-all trend on social media — a way to eliminate wrinkles, build lean muscle, boost metabolism, clear brain fog, heal torn ligaments and more. Influencers rave about their peptide-fuelled glow-ups on TikTok . Bodybuilders exchange information about their favourite combinations at the gym. US health secretary Robert F. Kennedy Jr is a proponent. “I’m a big fan of peptides,” he told US podcaster Joe Rogan in February. …