Preface

Phytogenic feed additives (PFAs) have emerged as significant substitutes for antibiotics in animal nutrition, thereby addressing the urgent need for alternative growth promoters and health enhancers in livestock production. Plant-derived substances, including phytogenic substances and their bioactive components such as essential oils, flavonoids, and saponins, have been used to enrich growth rates, feed utilization, gut health, and overall animal immunity, productivity, and health. However, the ban on antibiotics as growth promoters owing to their contribution to antimicrobial resistance, carry-over effects, and health concerns has necessitated the search for alternatives; PFAs have gained attention for their multifunctional benefits. They not only promote growth, but also enhance gut health, modulate microbiota, and improve oxidative status without adverse effects associated with antibiotic use. The efficacy of specific PFAs such as thyme, curcumin, milk thistle, rosemary, bee pollen, and propolis has been highlighted, demonstrating potent antioxidant and antimicrobial activities. The roles and importance of PFAs in animal nutrition, product safety, and quality are multifaceted. They are viable alternatives to antibiotics and contribute to sustainable livestock production and consumer health. Continued research and development of PFAs are crucial for optimizing their use and realizing their full potential in various animal species. This book provides up-to-date reviews on valuable natural phytogenic growth promoters to completely or partially replace antibiotics as classical growth promoters, thus decreasing the adverse effects of antibiotics on animals, humans, and the environment. The book also supplies the scientific basis of phytogenic additives and services to scientists, students, the livestock industry, and the feed and food sectors for their efforts to improve animal and human health, product quality, and food safety.