Peptides are gaining popularity partly because they are not classified as steroids, which are associated with negative side effects like acne and rage.

“Peptides of course just being strings of amino acids, as you mentioned the very small ones like two amino acids like L-carnitine all the way up to polypeptides, which just mean many amino acids. There's so many peptides that we should probably just do an entire episode about peptides, but I think one of the reasons I'm hearing so much about peptides these days is that they are not called steroids. The name steroids I think has come to be associated with anabolic steroids in the context of acne, testosterone rage, et cetera. But of course testoster, excuse me, estrogen is a steroid hormone, right? There are other steroid hormones, as we both know. But peptides are gaining increasing popularity.”