MTHFR and epilepsy: The probability of post-traumatic epilepsy increased in the subjects with the TT versus CC genotype (crude OR = 1.52 [1.04–2.22], p = 0.031; adjusted OR = 1.57 [1.07–2.32], p = 0.023), which shows that the MTHFR enzyme is a biologically plausible genetic risk factor for epilepsy, and HHcy can be assumed as a proconvulsant agent [21].