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From so-called looksmaxxing to muscle recovery, injectable peptides are being advertised on social media as a miracle elixir. However, many medical experts say there is little evidence the products are safe or effective. Peptides are short chains of amino acids the same building blocks that make up proteins. They can have a range of effects on your body. FDA-approved peptide drugs include insulin and GLP-1 medications used to treat diabetes and obesity. But many peptides promising wellness, recovery, or anti-aging purposes are not FDA-approved. Unlike FDA-approved drugs, those products have not gone through FDA review establishing safety and effectiveness in humans. “We don’t know if it builds muscle and also helps promote tumor growth or anything else that you might not want to grow in your body,” said Shabbir Imber Safdar, Executive Director of the Partnership for Safe Medicines. “It’s just not been studied in enough humans to know.” According to the American Peptide