Nervidyne: Myelin Sheath Support for Nervous System and Brain About Myelin Sheaths They are part of your central nervous system, which carries messages back and forth between your brain and the rest of your body. Healthy myelin sheaths are essential for the proper functioning of your nervous system. Myelin Sheaths are sleeves of fatty tissue (lipid-rich substance) that protects your nerve cells, wrapping around them like insulation around electrical wires, and are easily damaged by mercury (black dental fillings). Mercury can melt the myelin sheath right off a nerve cell, and Nervonic acid may support...