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

By The Guardian Science · 2026-04-04
What are peptides, are they safe and is there evidence to back up the hype?
Why it matters: The investigation by the medicines watchdog could lead to regulation or restrictions on UK peptide clinics and their health claims.
Influencers and athletes are heavily promoting peptides for benefits like injury repair, weight loss, and anti-aging, creating significant hype around these substances. However, the UK's medicines watchdog is launching an investigation into peptide clinics due to concerns over the health claims and safety of these unregulated treatments.

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