A meta-analysis has found a possible role for nutraceutical supplements in treating acne, one that will require better research practices to reveal their effectiveness. In a paper, the team reviews 42 articles encompassing various nutraceutical effects on acne. The collective meta-analysis included 3,346 participants across diverse methods and treatments tested. Zinc was the most studied nutraceutical, with approximately half of the studies showing efficacy, especially at higher doses. Zinc also had the highest rate of adverse effects, primarily gastrointestinal. Vitamins A and B5 showed some effectiveness. The vitamin dosages in the studies analyzed were often well above daily recommended use,...