Enzymes are fundamental to all life. They are in every living thing. Enzymes are substances that make life possible. They are needed for every chemical reaction that occurs in the body. Without enzymes no biological activity would occur.
Enzymes are protein catalysts necessary for metabolic functions.
They catalyze and regulate nearly all biochemical reactions that occur within the human body. There are literally hundreds of thousands of enzymes active in human metabolism. Enzymes are too small to be seen through the most powerful microscope. They move your muscles, stimulate your nerves, make your heartbeat, keep you breathing, and allow you to think. Our bodies cannot exist without enzymes.