Reports on a study where three casein hydrolysates (degree of hydrolysis (DH) of 23, 47, and 65.5 (%)) were debittered using three different hydrophobic adsorption columns, C18, C8, and phenolic resin (PR). Study methodology; What higher DH hydrolysates resulted in; Conclusion that antigenicity of treated hydrolysates was reduced by the debittering process.