Cases of leukocytoclastic vasculitis (LCV) induced by food additives are extremely rare.1-3 We report a case of LCV presenting with purpuric lesions almost exclusively on upper body parts. In this case, none of the common causes of LCV could be found, but double-blind, placebo-controlled oral challenge testing (DPOC) with common food additives revealed sodium benzoate as the causative substance.