From a historical viewpoint, the relationship between diet and acne lesion has been always controversial. While old studies, particularly those performed before the 1960s, proposed that some certain foods and additives may exacerbate acne lesions, many of these alleged association were dispelled by subsequent studies (Bowe et al., 2010).
Some connections between diet and acne, however, are remained neglected and need to be cl arifie d s ci entific ally.
In this study, for the first time in the literature, the effect of adding red and black types of pepper to daily diet of patients with mild-to-moderate acne vulgaris was investigated.