Beneficial Effects of Garlic in Livestock and Poultry Nutrition: A Review

The ban on the use of synthetic antibiotics in feed by the European Union has pushed animal nutritionists to use natural alternatives as growth promoters, such as prebiotics, probiotics, organic acids, herbs and several others. Garlic (Allium sativum), one of such natural alternative growth promoters, is used globally as a spice in human food preparation. Garlic belongs to the genus Allium and family Liliaceae and is grown in tropical and subtropical countries. Studies have revealed that garlic is a rich source of essential nutrients and beneficial phytochemicals that can be incorporated in animal feed to enhance gut activity and promote growth in livestock and poultry. Research abounds that indicates that garlic phytochemicals have antibacterial, antifungal, hypocholesterolemic and antioxidant effect in animals. This review intends to showcase the importance of adding garlic in livestock and poultry nutrition, so as to promote its use in animal nutrition as an alternative phytochemical source for better growth, health and production performance. The use of garlic in feed as replacement of antibiotics will reduce antimicrobial resistance and ensure safe, organic and healthy food for humans.