l carnitine l tartrate or acetyl Old School Labs 4-in-1 Liquid L-Carnitine 3000 Plus for Energy & Metabolism iSatori L-Carnitine LS3 3000, Liquid

(PubMed) Turunen M, Wehlin L, Sjoberg M, et al

Endima L-Carnitine 360 is a dietary supplement tablets with L-Carnitine, zinc and sweeteners

And it can certainly be indicated for those who have a deficiency in their own production of carnitine and are vegetarians

Although there was a decrease in the median (IQR) of GI symptoms score in the patients on KD with L-carnitine supplementation in comparison to KD only group indicating clinical improvement in GI symptoms, and an increase in the median (IQR) of the Bristol stool scale indicating that the stool was softer, these results didnt reach statistical significance

L-Carnitine helps to transport fatty acids to the mitochondria of the cell so it can be burned as fuel