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).
Benefits of Vitamin B3: Niacin. One of the best benefits of vitamin B3 is that it can help boost your HDL cholesterol â your good cholesterol. The higher your HDL is, the lower your bad cholesterol count will be. Though B3 deficiency is relatively rare in development countries, it is common among alcoholics.