I believe if there is a depletion of taurine, it can impair nerve regeneration. Same w/ ALCAR?
Here is something Carl Valle posted years ago that I have on file about this:
Hart AM, Wiberg M, Youle M, Terenghi G. Systemic acetyl-L-carnitine eliminates sensory neuronal loss after peripheral axotomy: a new clinical approach in the management of peripheral nerve trauma. Exp Brain Res 2002 Jul;145(2):182-9
Taglialatela G, Angelucci L, Ramacci MT, Werrbach-Perez K, Jackson GR, Perez-Polo JR. Stimulation of nerve growth factor receptors in PC12 by acetyl-L-carnitine. Biochem Pharmacol 1992 Aug 4;44
Nutr Neurosci. 2001;4(6):439-43. Taurine as a micronutrient in development and regeneration of the central nervous system. Lima L, Obregon F, Cubillos S, Fazzino F, Jaimes I.