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NADH, also known as coenzymatic vitamin B3, is involved in cellular metabolism. It primarily helps produce and regulate energy in the cells of your body. It works with the enzyme called "nicotinamide adenine dinucleotide phosphate" (NADP). This composite molecule then helps to break down carbohydrates, fats and proteins into smaller components that can be used by the cell to produce energy via a process called aerobic respiration. In other words, NADH may help with energy levels.

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