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Effect of CBD (4 µM) on catalase activity as well as vitamin A and vitamin E levels in keratinocytes exposed to UVA (30 J/cm2) and UVB (60 mJ/cm2) radiation. The keratinocytes were obtained from healthy subjects (I) (n = 15) and patients with psoriasis vulgaris (II) (n = 30). The mean values ± SD are presented with statistically significant differences: a-vs. control/psoriasis group; b-vs. group without CBD; x- psoriasis vs. control groups; p < 0.05.
