Acts as an anti-inflammatory, soothing and calming agent. It also serves as an antihistamine and immune-suppressor to reduce itchiness and hence scratching by inhibiting the autoimmune response. It is effective in preventing psoriasis. Moreover, it functions as an inhibitor of fibroblast growth factor-5 (FGF-5), a substance that induces regression of the hair follicle and regulates hair growth. Decapeptide-19 antagonises FGF-5’s activity in living organisms and acts against hair loss.