metaboliser

Noun

metabolizer (plural metabolizers)

1. Any substance that increases the ability of the body to metabolize a specific class of compound (such as fat).
2. One who metabolizes.
   • We could therefore assert that a person who uses, on average, more than 110 calories per hour would be termed a fast metabolizer and a person who uses less than 90 calories per hour would be a slow metabolizer.2012, Douglas Graham, The 80/10/10 Diet, page 244