Most of the research has been in animals or labs, not humans, says Paul Knoepfler, a cell and molecular biologist at University of California, Davis
It means the peptide is well-tolerated, does not produce meaningful adverse effects, and carries minimal risk for most users
But experts emphasize that a thoughtful approach matters
Hair loss You may also notice clumps of hair falling out in the shower or when you run a brush through it
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PMID: 25866791 View source Seiwerth S, et al