Why are the aldehyde and peroxide contents of a detergent important?

Aldehyde and peroxide contents in a detergent are considered contaminants and you should remove as much of them as possible. Some detergents have ultra low aldehyde and peroxide concentrations to reduce the effects of peroxidase and carbonyl compounds that negatively interact with membrane proteins.   

Linked below is a simple way to remove aldehydes and peroxides from your detergent.