Enzymes decrease the time that is needed to reach equilibrium. But enzymes do not actually change the equilibrium itself. They do not change the energy of the product and reactants, nor they actually change the amount of product or reactants that is formed at equilibrium. So to see what we mean, let's take a look at the following energy diagram. So, let's suppose we have a hypothetical elementary single step reaction in which the reactants are these and the products are these. So on the reactant side, we have a bond between A and B, and C exist by itself.