Enzymes help break down these fats, proteins, and carbohydrates into acetyl and they then help extract the final energy from acetyl. Enzymes also need helpers, and these helpers are called coenzymes. NADH, through a series of reactions with acetyl and oxygen, is able to produce energy. Therefore, a good supply of NADH optimizes energy production in the body. Another function of NADH is its ability to help transform an amino acid called tyrosine into the important brain chemical dopamine.
Dopamine is involved in mood, energy, sexual drive, concentration, memory and muscle movement.
NADH is normally found in meat, fish, and poultry. The content of NADH in fruits and vegetables is minimal. The claims NADH was introduced to the US health market in 1995. There are claims that NADH can improve memory, athletic performance, slows the aging process, and is helpful in a variety of conditions including Alzheimer's disease, Parkinson's disease, chronic fatigue syndrome, depression, and overall lack of energy. A small number of short term studies done with an oral form of NADH have shown slight to moderate benefits in regards to depression, Parkinson's disease and Alzheimer's disease.