The Use of Phytogenic Substances Against Chronic Stress: Opportunities and Challenges

The demand for biotics as alternatives to antibiotics that promote growth and lessen the use of antimicrobials in poultry farms is fueled by recent worldwide regulations and consumer expectations. Phytogenic substances are becoming increasingly valuable options because many of these natural compounds possess anti-inflammatory and antioxidant properties that are only less commercialized. The usage of phytogenic substances can also help maintain a balance of healthy microorganisms in the gut, which is beneficial for the digestive system to withstand various chronic stressors, both infectious and non-infectious. Although some phytogenic substances are commercially available, these are typically hampered by inconsistencies in their effectiveness, low bioavailability, and low stability. This chapter discusses the current and potential phytogenic compounds that can exert antioxidant and anti-inflammatory properties to improve poultry production and restore intestinal microbiota. Additionally, the main challenges still related to phytogenic products will be discussed.