Abstract
Phytobiotics are plant-derived substances rich in bioactive compounds such as phenolics, organosulfur compounds, terpenes, and aldehydes. Phytobiotics can be classified based on their origin or chemical structure, with the main categories being essential oils, oleoresins, and herbs and spices. Phytobiotics have gained interest due to their positive effects on animal health, including anti-inflammatory, anti-oxidant, and antimicrobial properties resulting in improved growth performance. This review explores the mode of action of phytobiotics based on their bioactive compounds and highlights their impacts on intestinal health and growth performance in pigs. The inclusion of phytobiotics in pig diets has shown promise in mitigating negative impacts caused by environmental and dietary challenges by reducing inflammatory and oxidative stress responses, enhancing intestinal barrier function, and exhibiting antimicrobial properties against pathogens like Escherichia coli. Collectively, phytobiotics showed a diverse biological activity through different mode of actions, resulting in improved growth performance and overall health in pigs, making phytobiotics a valuable feed additive in pig nutrition and production.