What are peptides, are they safe and is there evidence to back up the hype?

Influencers and athletes are among those claiming substances can help with injury repair, weight loss and angi-ageing

• Medicines watchdog to investigate UK peptide clinics over health claims

From influencers to athletes, high-profile figures are hailing peptides as the route to wellness, claiming they help with injury repair, weight loss, anti-ageing and mood. We take a look at what these substances are, and the murky industry surrounding them.