Neuroprotective effect of cannabidiol
Heavy alcohol consumption in the rat induces substantial damage to the nerves in several brain areas. American researchers demonstrated that cannabidiol (CBD) protected against this neurodegeneration in a dose-dependent fashion. Similarly, several other antioxidants such as alpha tocopherol (vitamin E)  also afforded significant protection. Authors concluded that their study "provides the first demonstration of CBD as an in vivo neuroprotectant and shows the efficacy of lipophilic antioxidants in preventing binge ethanol-induced brain injury."
(Source: Hamelink C, et al. J Pharmacol Exp Ther 2005 May 5 [electronic publication ahead of print])
 vitamin E is also present in hemp seed oil