SMRTR Science & EngineeringApr 19, 2026Scientific American

The science behind the peptide craze

SMRTR summary

Influencers and fitness enthusiasts are increasingly self-injecting peptides like BPC-157 and TB-500, claiming these substances accelerate recovery, improve skin, and build muscle despite limited clinical evidence supporting their benefits. The FDA banned several popular peptides in 2023 due to safety concerns, forcing users to acquire them from overseas or dubious online markets, but Robert F. Kennedy Jr. now proposes legalizing domestic production of 14 peptides.

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