What is an enzyme? How to choose enzyme jelly, stock solution and preserved plum? Why?

Stock solution, what is an enzyme? Enzyme is a kind of substance with special biological activity, which is composed of amino acids. It exists in all living animals and plants, and is an essential substance for maintaining normal functions of the body, digesting food, repairing tissues and other life activities. It participates in almost all life activities. Why can enzymes lose weight? Enzymes can break down fat. So it can play a role in losing weight.