Dietary Supplement With Serrata Peptidase Proteolytic Enzymes Systemic Enzyme Support Purity & Potency Guaranteed Isura Non-GMO · Mass Spec Documentation - Lab Tested Zymactive is an advanced formula that provides systemic enzyme support for the body's natural healthy inflammatory response and immune system. Zymactive supports muscle, joint, and overall tissue health. Recommended by Dr. Michael Murray, one of the world's leading experts on natural medicine. Also available in Regular Strength. Manufactured by Natural Factors to ensure safety and potency in accordance with Good Manufacturing Practices (GMP) of the FDA and Health Canada.