Günther S, el-Ghorab M I, Günther U
Z Hautkr. 1985 Jun 1;60(11):897-901.
The serum carotene and retinol levels were determined in 25 male psoriatic patients and 25 healthy male controls. No difference was observed in carotene level, however, retinol level was found lower in psoriatic patients as compared to controls.