The enzyme selectively reduces one enantiomer, yielding a highly enantiopure alcohol and ketone, as shown below.

This enzyme reduces the 4,5 double-bond of the hormone testosterone.

The enzyme breaks those complex sugars into simple sugars, making these foods somewhat more digestible, and reducing intestinal gas.

This enzyme quickly reduces the stimulus to the muscle, which allows the degree and timing of muscular contraction to be regulated delicately.

The enzyme also reduces 1-phenylpropane-1,2-dione.

These enzymes reduce the sugar residue from ribose to deoxyribose by removing oxygen.

Tungsten-using enzymes typically reduce free carboxylic acids to aldehydes.

By providing an alternative reaction route the enzyme reduces the energy required to reach the highest energy transition state of the reaction.

The third enzyme reduces the dihydroxyacetone to glycerol, a type of sugar.

In addition, the enzyme reduces and inactivates 17-deoxycorticosterone, the precursor of aldosterone and corticosterone.