Two Chinese studies were conducted to evaluate the effects of alpha-galactosidase on broiler performance fed corn-soybean meal diets. Their results indicated that the alpha-galactosidase additions improved true nitrogen-corrected metabolizable energy, methionine/cysteine availability, and digestibility of dry matter, organic matter, crude protein, calcium and phosphorus. These researchers concluded that alpha-galactosidase supplementation of corn-soybean meal-based diets can improve performance of broilers in early stages of growth.

Wang, C.L. and co-workers. 2005. Effects of alpha-galactosidase supplement to corn-soybean diets on nutrient utilization, performance, serum indices and organ weight in broilers. Australasian J. Animal Sci. 18(12): 1761-1768.