We may earn compensation from the products and offers mentioned in this article. However, any expressed opinions are our own and aren’t influenced by compensation. To read our full disclosure, click here. Propionyl-L-Carnitine Can Boost Your Workout If this is your first time reading about carnitine, you are probably wondering what exactly carnitine is. Propionyl-L-carnitine (GPLC)...

By Corey Lewis, CPT, CSCS