l carnitina dia L-carnitina, 1000 mg, 100 comprimidos L-Carnitine 3000 Amino Acids Powder
Description
Interestingly, there was no difference in carnitine levels between MS patients with or without fatigue

In Vivo Monitoring of Sevoflurane-induced Adverse Effects in Neonatal Nonhuman Primates Using Small-animal Positron Emission Tomography

Tamai et al., 2004
Malnourished children have low levels of many enzymes and it is likely that cofactors for carnitine could be lacking as well

M.Vande VoortJ