Application of Kaempferia galanga (K. galanga) as a Phytogenic Feed Additive in Broiler Diets

Abstract

Kaempferia galanga L. is a medicinal plant belonging to the Zingiberaceae family that has attracted increasing attention as a phytogenic feed additive in poultry production. The growing concern regarding antimicrobial resistance and the restriction of antibiotic growth promoters have encouraged the exploration of plant-based alternatives in broiler diets. This review summarises current scientific evidence on the biological properties and potential applications of K. galanga in broiler nutrition. Data were collected from several scientific databases, including Elsevier, ScienceDirect, ResearchGate, and Google Scholar, using keywords related to K. galanga, ethyl p-methoxycinnamate, essential oil, and poultry. The rhizome of K. galanga contains various bioactive compounds, particularly ethyl p-methoxycinnamate, flavonoids, essential oils, and phenolic constituents, which exhibit antioxidant, antimicrobial, anti-inflammatory, and immunomodulatory activities. These properties contribute to improved physiological status, enhanced digestive efficiency, and better immune responses in broiler chickens. Dietary supplementation of K. galanga has been reported to improve growth performance, feed conversion ratio, carcass characteristics, and meat quality while reducing blood lipid profiles and abdominal fat deposition. Additionally, its antimicrobial effects may support intestinal health by inhibiting pathogenic microorganisms. Overall, K. galanga demonstrates promising potential as a natural phytogenic feed additive for improving broiler productivity and health status. However, further studies are required to determine optimal dosage levels, clarify the mechanisms of action, and evaluate its long-term effects under commercial poultry production systems.