**NOTE: All laboratory testing requires an authorizing physician in order to complete the laboratory testing**
This test measures the amount of a substance called carnitine in your blood. It looks at how much usable or “free” carnitine you have. It compares that with the total amount in your blood.
Carnitine is a compound that’s present in nearly every part of your body. Your cells normally use the fats in your body for energy. Without carnitine, your body has trouble digesting fatty acids. It can’t turn fats into energy. It uses the sugar in your blood for energy instead.