The goal of this clinical trial is to compare in acne vulgaris patients. The main question it aims to answer is: • To assess the therapeutic benefit of vitamin D supplement in acne vulgaris treatment, following a 2-month treatment regimen that includes vitamin D supplementation compared to conventional (systemic azithromycin and topical retinoid) treatment alone. Participants will receive vitamin D supplements in addition to capsule Azithromycin and topical retinoid. Researchers will compare groups to determine efficacy of Vitamin D supplements in the treatment of Acne vulgaris.