The antiaging activity of the RJ hydrolysate was evaluated using the D-galactose induced aging mouse model in vivo. In the respects of improving external aging performance, low dose of RJ hydrolysate could significantly prevent the body weight loss of the aging mouse. Both low and high doses of RJ hydrolysate improved the age-related locomotor decline. Moreover, the administration of RJ hydrolysate improved both spatial and non-spatial long term memory of mice, help them maintain good spatial orientation ju...