l-carnitine free form vs fumarate Fumarate, 500 mg, 300 Capsules Acetyl-L-Carnitine: Benefits, Forms, Dosing, and
Description
The L-carnitine is a molecule naturally present in the body, primarily known for its role in energy metabolism by facilitating the transport of fatty acids into the mitochondria

Exp Clin Endocrinol Diabetes 2013;121:234-8

: No established NRV

If you already consume other caffeine sources (coffee, tea, energy drinks), consider your total daily intake

Psychopharmacology 236 , 15971609 (2019)
