| abstract |
(57) [Problem] To provide a novel antioxidant protein hydrolyzate. SOLUTION: The protein hydrolyzate, a) having an average molecular weight of 1,000 to 13,000 daltons, b) the content of methionine is 2 to 3 (weight)%; c) the content of tryptophan is 1 (weight)% or less; d) the content of histidine is 0.5 to 2.5. (Weight)%, e) the content of tyrosine is 2 to 5 (weight)%, f) the content of arginine is 1 G) 5% by weight of glucose, 10% by weight of a protein hydrolyzate was added thereto, and the reaction solution was heated and reacted at 200 ° C. for 1 hour. A transmittance of 90% or more measured at a wavelength of 540 nm using a glass cell having a thickness of 1 cm; and h) ESR An antioxidant protein hydrolyzate having the physicochemical property that the reaction value k for suppressing the production of hydroxyl radical by a spin trap method is 2 × 10 11 M −1 · s −1 or more. |