A new study reveals that a simple vitamin has dramatically reduced neurological damage in mice suffering from a multiple-sclerosis-like illness. Research scientists hope that a form of Vitamin B3 (nicotinamide) may help reduce long-term disability in people with MS. Scientists believe that Vitamin B3 worked in the mice because it raises the level of a key nervous system chemical called nicotinamide adenine dinucleotide (NAD), which appears to improve the energy efficiency of nerve cells. However, Kenneth Maieses, a Wayne State University School of Medicine professor, points out that the doses of Vitamin B3 given to the mice were quite high. Similar doses in humans can prove to be toxic.