Diet and Acne Systematic Review v1

This protocol describes the planned methods for a systematic review investigating the association between dietary factors and acne vulgaris. The review will evaluate randomized controlled trials and observational studies that examine the effects of dietary exposures—including glycemic load, dairy, chocolate, omega-3 fatty acids, and overall dietary patterns—on acne incidence and severity. The expected outcome of this protocol is a transparent, reproducible methodology that will synthesize existing evidence and clarify dietary contributions to acne development and progression. Results are anticipated to provide guidance for clinicians, patients, and researchers in understanding the role of nutrition in acne management.