Peptides are everywhere. Here’s what you need to know.

Peptides have become widely available and popular for weight loss, performance, and alleged longevity benefits despite limited human-trial evidence, a largely unregulated online market (much of it China-sourced), and increasing concern from regulators and clinicians about safety and product quality.
Why it mattersFDA's limited enforcement against China-sourced experimental peptides means clinical providers must tighten patient screening and consent.