If you take an unregulated drug, you might as well be a lab rat, considering the side-effects Peptides bring many benefits, but in some cases can be harmful You may have heard the buzz about peptides. They have been touted as a way to slow down ageing, improve muscle strength, speed up recovery after an injury and improve your mood. One type, called the semaglutides, include Ozempic, Wegovy and Mounjaro. They are being used by millions of people for diabetes and weight loss.