What it does is it removes this age along with one electron and this age along with one electron, and we form fadh two. And we finally reform this lipo amide essentially one electron here, one electron here, reform that sigma bond that existed between these sulfur groups here. So we reform that lipo amide coenzyme that now can be used to restart this process of pyruvate decarboxylation with another pyruvate molecule, because, remember, we have two pyruvate molecules coming from a single glucose molecule. But we're not done here, because this fadh two. And the next step is used to actually transfer those two electrons onto the NAD. And so we have two electrons, and a single H atom goes onto the NAD to form NADH.