PROBLEM TO BE SOLVED: To increase the confidence of a consumer to goods, and further, to allow a consumer to select goods without anxiety.SOLUTION: A protein hydrolyzate 4 used upon production of a food product 1 includes a protein hydrolyzate inclusion sealed body 5 sealed with the protein hydrolyzate 4 separately from the food product. The protein hydrolyzate sealed body is sealed with the protein hydrolyzate by the weight same as the total weight of the protein hydrolyzate used for the food product.