Why? Well, because all different types of structures, the proteins and Euclide acids and DNA molecules are held together by what types of bonds will electric bonds. And these electric bonds can essentially be disrupted as a result of the increase in the ion concentration of the H plus ions. And so our cells actually have mechanisms that turn off glycolysis when there is too much build up of the H plus ions in our blood. And that's exactly why eventually as we're sprinting, we have to stop because of this idea, because glycolysis is shut down as a result of this molecule acting as an allosteric inhibitor to specific enzymes of glycolysis. Now, we know what lactate is, we know why we produce lactate and we know what types of cells produce lactate.