The FDA has tested and cleared many peptides for both medicinal purposes and clinical trials. Science is constantly discovering more groundbreaking positive effects of peptide therapy. Peptides formulations can be natural or synthetic. While well-designed synthetic peptides are safe, it's important to avoid low-quality versions provided by non-reputable providers. This is why it is important to entrust your health to the specialists at Peak Male Institute.   While uncommon, some minor side effects we’ve seen patients experience include:   Dry mouth Itching at the injection site Some drowsiness Increased hunger or thirst