NEW You can now listen to Fox News articles! The peptide boom is under scrutiny as the FDA weighs easing restrictions on several drugs in the category. Peptides, which are short chains of amino acids that serve as the building blocks of proteins, have gained popularity among wellness influencers and fitness gurus as a means of building muscle, healing injuries or appearing younger. Similar to how GLP-1s (glucagon-like peptide-1 agonists) suppress appetite and trigger weight loss , peptides can signal other functions, like the release of growth hormones. SUPPLEMENT SOLD AT GAS STATIONS SPARKS HEALTH FEARS AS PEOPLE REPORT ADDICTION SYMPTOMS But unlike GLP-1 drugs — which were extensively studied and regulated — many peptides lack comparable evidence and oversight, said New York endocrinologist Dr.…