The present disclosure provides a nutritional composition, such as a preterm infant formula that includes a protein source comprising whey protein and hydrolyzed casein protein. The whey protein to hydrolyzed casein ratio may be from about 90:10 to about 50:50 by weight. The hydrolyzed casein may have a degree of hydrolysis of from about 20% to about 80%. Additionally, provided are methods for improved gastric emptying and improved digestibility in a target subject, such as a preterm infant. When administered, the nutritional compositions may promote intestinal transit and absorptive capacity. Consequently, better growth and development, especially neurological development of the target subject may be achieved.本發明提供一種營養組成物，例如早產嬰兒配方，其包括含有乳清蛋白及經水解之酪蛋白蛋白質之蛋白質來源。該乳清蛋白對經水解之酪蛋白比例可為約90：10至約50：50重量比。該經水解之酪蛋白可具有約20%至約80%之水解度。此外，提供用於改善目標個體內胃排空及改善目標個體內消化率之方法，該目標個體例如為早產嬰兒。當投與時，該營養組成物可促進小腸通過及吸收容量。因此，目標個體的較佳生長及發育、特別是神經發育即可達到。
