Seven multiple sclerosis subjects had their silver dental fillings (amalgams) removed which contained approximately 50% mercury. A visual evoked response (VER) test was performed before amalgam removal. Approximately six months after amalgam removal a second. VER test was performed on all subjects, and the latencies of the VER decreased significantly. The mean latency of PI for the right and, left eye combined decreased by 23.1 milliseconds (P=0.011) and N1 of the right and left eye combined decreased by 31.7 milliseconds (P=0.026). It was hypothesized that mercury from dental amalgam was an etiological factor in reduced nerve conduction velocity in MS subjects.