* Dietary Supplement * Dr. Michael Murray Formulated * Systemic Enzyme Support for Overall Good Health * Purity & Potency Guaranteed Zymactive, a high potency formula that provides systemic enzyme for the body"s naturak inflammatory response and immune system. Zymactive supports muscle, joint and overall tissue health. Enzyme potencies are guaranteed at time of manufacture. All Natural Factors products are manufactured in accordance with the Government of Canada"s Good Manufacturing Practices (GMP), among the highest standards in the world.