Several autoimmune diseases can attack the nervous system, including multiple sclerosis, myasthenia gravis and Guillain-Barré syndrome, among others.

Gluten is a type of protein found in wheat, rye, barley and related grains, such as spelt and farro. It may also be added to processed foods as a thickening agent. When you have celiac disease, your body reacts negatively to gluten, resulting in damage to your small intestine.

Autoimmune disorders such as lupus and rheumatoid arthritis can cause a wide array of seemingly unrelated symptoms. Lupus, also known as systemic lupus erythematosus, is a systemic illness and can affect any organ system.

Proper nutrition is important to health and vitality. Prolonged vitamin deficiencies can cause a variety of physiological issues. Vitamin B-12 is a water soluble vitamin that plays a crucial role in the healthy formation of red blood cells, tissues and DNA.