People are buying unregulated, injectable peptides from Chinese factories. Are they safe?

WBUR

By Indira Lakshmanan and Grace Griffin
March 24, 2026

With the popularity of GLP-1s skyrocketing, the “P,” which stands for peptides, is having its own moment.

Peptides are naturally occurring chains of amino acids that send signals to our bodies to perform important processes. They regulate the immune system, grow cells, reduce inflammation, manage hormones and more.

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