Many hormones and their structural and functional analogs are used as medication . The most commonly prescribed hormones are estrogens and progestogens (as methods of hormonal contraception and as HRT ),  thyroxine (as levothyroxine , for hypothyroidism ) and steroids (for autoimmune diseases and several respiratory disorders ). Insulin is used by many diabetics . Local preparations for use in otolaryngology often contain pharmacologic equivalents of adrenaline , while steroid and vitamin D creams are used extensively in dermatological practice.
Finally, some of the most innovative peptides are neuropeptides (which claim to relax facial muscles, therefore reducing the appearance of wrinkles, similar to BOTOX). The most popular is called Acetyl Hexapeptide-8 or Argireline. One serum that includes Argireline is PCA Skin's Exlinea Peptide Smoothing Serum pHaze 25 (, $102) . Another example of this type of peptide is Syn-ake, a synthetic peptide that claims to reduce the depth of wrinkles and increase skin's smoothness. It is based on an ingredient that mimics the venom of the Asian Temple Snake. You can find this in serums such as Sonya Dakar MicroVenom EyeLift Complex (, $82) .