Kirkman’s proprietary DPP-IV Forte contains a dipeptidyl peptidase IV (DPP-IV) analog for comprehensive digestion of protein peptides. DPP-IV is a protein that has a primary function in breaking down casein and side chain activity in breaking down gluten. DPP-IV Forte works in a unique way to specifically break apart proline-containing peptides (casomorphin, gluteomorphin and gliadomorphin), which are generally known to come from dairy products and cereal grains. The DPP-IV enzyme assists digestion of these peptides, which are generally resistant to being completely broken down by other enzymes.