Many cell types, including epidermal cells60, lymphocytes61, macrophages62, fibroblasts63 and dendritic cells64, secrete ghrelin, and these cells have been reported to mediate effects on skin inflammation, including contact dermatitis and psoriasis65–67, indicating the possibility that ghrelin may affect contact dermatitis and psoriasis. The gene discussed is GHRL; the disease is dermatitis.