ISSUE FOCUS FEED & ADDITIVE MAGAZINE October 2025 51 Animal agriculture is confronting a significant challenge: How to sustain animal health and productivity while reducing dependence on, or without antibiotics, especially antibiotic growth promoters (AGPs). The widespread and routine use of antibiotics in livestock has played a major role in the global rise of antimicrobial resistance (AMR), posing serious risks to both animal and human health. A promising path forward through nutrition-driven strategies that promote gut health stands out. These approaches not only support animal well-being but also boost productivity and welfare by enhancing the gut’s natural defenses, improving nutrient absorption, and lowering disease risk. Nutrition-based solutions can also offer a sustainable alternative to antibiotics. THE GUT MICROBIOME: A CORNERSTONE OF LIVESTOCK HEALTH Managing the gut environment is essential for animal health and performance. Beyond digestion and nutrient absorption, it is home to a complex community of microorganisms—the gut microbiome—that significantly influence immune function, pathogen resistance, and overall well-being. A healthy microbiota creates a natural barrier against harmful bacteria through competition, regulating inflammation, and aiding nutrient metabolism. The gut is also the largest immune organ in poultry and livestock, containing gut-associated lymphoid tissue that detects and responds to pathogens. FACTORS TO CONSIDER WHEN SELECTING FEED ADDITIVES Enhancing gut health requires understanding the microbiome, immune function, nutrient absorption, and disease risk. This knowledge assists in the selection and integration of nutritional strategies and the potential incorporation of feed additives based on their specific modes of action. When evaluating additives, I keep several key factors in mind: Targeted gut health benefits: Choose additives by their specific modes of action and desired outcomes, such as modulating gut microbiota, enhancing digestive enzyme activity, reducing pathogens, stimulating immunity, and improving gut barrier integrity. Nutrition-driven gut health is emerging as a practical approach to support animal wellbeing while reducing antibiotic reliance. By targeting the gut microbiome, enhancing nutrient absorption, and modulating immune function, these strategies can improve productivity and resilience. Factors like dietary fiber, trace minerals, feed particle size, and bioactive compounds play critical roles, yet challenges remain. Integrated, datadriven interventions may offer sustainable solutions for livestock systems. NUTRITION-DRIVEN GUT HEALTH Edward Manchester Global Commercial Director Ecolex Animal Nutrition
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