In the process, we reduce NAD plus into NADH. So this is the oxidized version of nicotine amide adenine dinucleotide. And this is the reduced version of nicotine amy adenine dinucleotide. So in our body, lactate is transformed into Pyruvate by using lactate dehydrogenase. In the process, we reduce nicotine amide adenine dinucleotide. Now, Pyruvate NADH are basically used to basically form ATP molecules, the energy molecules used by our cells.