Background & Aim: Polycystic ovary syndrome (PCOS) is a major endocrine disorder in young age women affecting their health-related quality of life (HRQOL) and their mental well-being as well. In this review, the authors discuss the effect of cinnamon as an herbal medicine on PCOS in humans and introduce the advantages and efficacy of these herbs on the control of this problem.Experimental: In this review, the authors searched the main related keywords e.g. polycystic, and cinnamon in main biological data centers e.g. Science Direct, Pubmed and Google Scholar. Then, the authors classified articles and only discussed the valid full papers in different categories.Results: The study of papers related to the effect of cinnamon on polycystic ovary syndrome revealed that this herb can control this problem via some route e.g., by control of triglyceride and cholesterol to diminish risk factors of fat deposition and by inhibitory effects on oxidative cascade decreasing the cystic formation process.Recommended applications/industries: The review proposed the positive effect of cinnamon on the control of PCOS in humans. Therefore, supplementary cinnamon on feed can diminish PCOS via some metabolic cycle. Manuscript profile