[Treatment of vitiligo with phenylalanine and UV-A].

Seven patients with generalized vitiligo were treated with 100 mg/kg body weight phenylalanine in combination with UV-A. A 20% repigmentation of the vitiligenous area was achieved in only one patient. Three patients each showed either a sparse follicular repigmentation or no effect at all. Because of the disappointing therapeutic results and possible side effects, we cannot recommend a therapy with phenylalanine and UV-A for vitiligo.