Axons are usually surrounded by a fatty substance called myelin. Myelin allows action potentials to propagate quickly from one neuron to another, allowing for rapid signal transmission. It is a critical part of the nervous system and it's absence has devastating effects, as seen in conditions such as multiple sclerosis.
Researchers have found that patients with low levels of folate in their blood are more likely to develop hearing loss (Gok 2004; Lasisi 2010; Gopinath 2010), and that low vitamin B12 levels are associated with hearing loss (Gok 2004) and tinnitus (Shemesh 1993).
Vitamins to Help Lower Blood Pressure. High blood pressure and hypertension affect millions of Americans. If you have high blood pressure, you have a greater risk of heart disease or stroke. Often times, high blood pressure is aided by a vitamin deficiency. While simple changes in diet and lifestyle can help with lowering your blood pressure, adding more of these vitamins can help facilitate a blood pressure drop.