The potential use of Alpinia galanga and Piper betle as growth promoters in the broiler industry: A review

Phytogenic feed additives (PFA) have been studied in many poultry researches primarily as growth promoters due to the growing interest in using natural products in farming. However, few researchers opted to study Piper betle and Alpinia galanga as growth promoters in broilers despite these plants' abundance of beneficial phytoconstituents. Thus, this narrative review aims to provide insights to the readers on the characteristics and properties of Piper betle and Alpinia galanga to be used as growth promoters. This article also reviewed previous research on supplementing Piper betle and Alpinia galanga in broiler in-vivo studies. Issues and knowledge addressed in this review article help poultry researchers and industry to explore the potential of Piper betle and Alpinia galanga to improve the performance of poultry flocks in the future.