Fermented Feed in Broiler Diets Reduces the Antinutritional Factors, Improves Productive Performances and Modulates Gut Microbiome—A Review

The aim of this review is to highlight the most beneficial effects of dietary fermented feed in correlation with decreasing the antinutrient concentration in vegetal matrices usually used for broiler nutrition. Rational feed formulation is critical for animals because it improves animal performance, and provides the animal with the necessary nutrients to develop strong bones, muscles and tissues, and a properly functioning immune system. Fermentation of animal feed is useful as compounds with high molecular mass are converted into energy and compounds with lower molecular mass in the presence of enzymes produced mainly by bacteria and yeasts. Fermentation products contain probiotic compounds with beneficial effects on the health of the animal microbiome. Feed fermentation has other roles such as converting antinutrients into beneficial substances for animal organisms, and some studies have shown that fermentation of feed decreases the risk of antinutrient components presence. For the bibliographic research, different platforms were used (PubMed, Science Direct, MDPI resources), and numerous words or combinations of terms were used to find the latest information. Fermented feed utilization has been shown to enhance growth performance while promoting a healthier gut microbiome in animals.