What is moderately hydrolyzed protein milk powder? Moderately hydrolyzed protein milk powder is a nutritional milk powder made by acid or alkali hydrolysis of the protein in milk, decomposing it into small molecule peptides or amino acids, and then finely processing it. Moderate hydrolysis means that the degree of hydrolysis is between 10% and 30%. Compared with fully hydrolyzed protein milk powder, the content of small molecule peptides and amino acids is lower, which is more in line with the body\’s needs for protein absorption.