
Parents of children with autism are turning to a controversial stem cell treatment backed by the US health secretary. The Guardian’s chief reporter Ed Pilkington speaks to Kai Wright about a months-long investigation
Ugh, never getting another PRP for my tendons. Excruciating painful during, and I’m still limping hours later. Bonus: I can’t taken any ibuprofen or the like for two weeks, so it’s going to be a miserable two weeks of sinus headaches. And I had to pay for it all out of pocket because my insurance wouldn’t cover it.

Across the US, thousands of people are injecting themselves with unregulated peptides in pursuit of weight loss, muscle growth and younger-looking skin. Despite being labelled 'not for human consumption', the substances are readily available online and have surged in popularity among people disillusioned by traditional healthcare. To find out why so many Americans are willing to risk unknown side-effects for the promise of a quick fix, Adam Gabbatt meets the users and influencers driving the peptide boom, and investigates what's really inside some of these so-called 'miracle' drugs