Advances of Selenium in Poultry Nutrition and Health.

Selenium is widely acknowledged as an indispensable trace element for humans and various animals, including poultry. The addition of selenium in appropriate doses plays a crucial role in promoting poultry growth and reproduction. Conversely, both deficiency and excessive intake of selenium can pose significant threats to poultry health and production performance. In modern poultry farming, there is an increasing demand for precise nutrient intake, necessitating a comprehensive understanding of the multifaceted role of selenium. This review aimed to compare and contrast the properties and recommended addition amounts of different sources of selenium in poultry feed; to discuss the hazards and mechanisms associated with selenium deficiency or excess in poultry; to summarize the pivotal role that selenium plays in stress states among poultry. Overall, this review seeked to provide a comprehensive overview highlighting the significance of selenium in terms of nutrition and health for poultry while ensuring optimal utilization within poultry production.