The interactions between NADH（nicotinamide adenine dinucleotide） and three kinds of ROS（reactive oxygen species）

i.e.H

2

O

2

·OH and ONOO

-

were studied.It is found that NADH is capable of scavenging ROS

and the scavenging efficiency is varied toward different objects.Among the three kinds of ROS

OH is eliminated the most rapidly

and H

2

O

2

and ONOO

are eliminated relatively slower.Further studies show that myoglobin

which is an in vivo biomolecule

is able to accelerate the scavenging of H

2

O

2

by NADH notably due to its peroxidatic activity.