Coenzyme Q10 (CoQ10) is a substance similar to a vitamin. It is found in every cell of the body. Your body makes CoQ10, and your cells use it to produce energy your body needs for cell growth and maintenance. It also functions as an antioxidant to help protect the body.
It is also said to boost energy and speed recovery from exercise.
In addition, your capability to convert CoQ10 to ubiquinol also declines. It becomes more and more difficult for you to produce the ubiquinol necessary to deal with:
Increased metabolic demand
Insufficient dietary CoQ10 intake
Deficiency of factors required for biosynthesis and ubiquinol conversion
Age-related changes in your genes
And any combination of these factors
Some reports say your CoQ10 level decline becomes apparent as early as your 20's.