But the final concentrations of our product and reactions remain the same. In other words, let's look at this uncannyze and catalyze reaction. Again, suppose that the concentration and equilibrium of our uncatalyzed are as following we have concentration of A, we have concentration of B and construction of our product AB. Now, for the catalyzed reaction, even though equilibrium will be reached much quicker because of a catalyst, the final concentrations are exactly the same. They have not changed. In other words, catalysts do not touch the equilibrium of our reaction.