MEIJI FRUIT ENZYME are protein molecules which are the life force of all biological activities in human cells. Enzymes act as catalysts for the human cells to function. The body's ability to digest, absorb and utilize nutrients depends on the presence of enzymes. We don't have to go into details of enzymes. Just consider enzyme as a vital substance that sustain life. There are many types of enzymes which may be grouped into two categories. One group is the digestive enzymes such as protease, lipase and amylase.