Introduction: pqq as a new water-soluble vitamin, is an oxidoreductase prosthetic groups, participate in catalytic redox reactions in vivo, has some special biological activity and physiological functions. Pqq disodium salt is more stable than the pqq acid, with good water-soluble and has a strong absorbent. Functions: 1. To improve the body's immune function; 2. Prevention and treatment of liver injury; 3. To reduce free radical damage to human body; 4. Regulate various neurological diseases; 5. Promote the absorption of amino acids; 6. The prevention and treatment of alzheimer's disease; 7. Active nk cell and strong anti-cancer activity.