Background: Thymol (2-isopropyl-5-methylphenol) is a component of different essential oils and phenolic compounds that are derived from plants belonging to the Lamiaceae family and Monarda genera, and other plants that belong to the Apiaceae, Ranunculaceae and Verbenaceae families. Objectives: The increasing demand for organic meat free of antibiotic residues has derived the focus on naturally occurring plants that can be used in feed as an alternative to antibiotics. The problem with the antibiotics was that they started causing alterations in human health and bacteria became more resistant to antibiotics. In that aspect role of the thymus in poultry performance has been focused to study. Methods: Different articles were collected from Google Scholar database by searching keywords related to thymol and phytogenes. After collecting several articles, they were analyzed. Results: A review of different previous research has shown that thymol possesses many positive properties related to poultry health, naturally occurring antibacterial and antioxidant. It also modulates the immune response and regulates the gut microbial population. Conclusion: With the increasing demand for organic meat and its by-products thymol can be used as a green alternative to improve the performance of poultry chicken without producing any harmful effects.

Keywords: Thymol, Poultry production, Essential oil, Antioxidant, Growth Promoter.