Application of Saccharomyces boulardii in feed to improve health, wellness and productivity

One of the main pillars of human health depends on healthy nutrition. Chicken makes up a significant part of human nutrition particularly in societies experiencing economic inflation and severe disruptions to people's livelihoods. So livestock and poultry pose a crucial impact on food safety and immunity. Probiotics have acquired worldwide acceptance as a healthy ingredient for usage as a potential feed supplement to reduce foodborne diseases and confirm food hygiene from farm to fork. Feed additives containing live yeast, e.g. <i>Saccharomyces boulardii</i>, and yeast derivative products can increase feed intake and intestinal health, and improve productivity. This probiotic, non-pathogenic yeast possesses several health-beneficial properties for poultry and livestock. However, it was previously believed that yeast did not have an effective probiotic effect in chicken and poultry. In this review, the advantages of using <i>Saccharomyces boulardii</i> has been introduced as a probiotic for poultry and livestock. This comprehensive analysis explores the multifaceted applications of probiotics in animal feed from health and AMR perspectives, examining their mechanisms of action, benefits, and potential to transform sustainable animal production practices.