[header] How to take l carnitine [title] Boost low carnitine levels. [step] When the body does not absorb or make sufficient carnitine, doctors will prescribe oral l-carnitine. [substeps] Carnitine levels may be low because of many reasons. 
Genetic disorders are the most common, but medical procedures such as hemodialysis also drain the body of l-carnitine temporarily. Vegetarians or anyone who is on a strict diet may also have low carnitine levels.