Thiamine is a water soluble nutrient. Orally, thiamine is used for thiamine deficiency syndromes, including beriberi, peripheral neuritis associated with pellagra. It is used for poor appetite, ulcerative colitis, chronic diarrhea, GI disorders, cerebellar syndrome, as an insect repellent, diabetic neuropathy, AIDS, maintaining a positive mental attitude, enhancing learning abilities, heart disease, alcoholism, stress, improving athletic performance, aging and progression of nephropathy in patients with Type 2 diabetes. Thiamine is also used orally for canker sores, immunodepression, memory loss including Alzheimer’s disease, vision problems such as cataracts and glaucoma, motion sickness, and increasing energy.