Vitamin B12 Plain is a therapeutic group that includes vitamin B12 supplements without any additional additives or compounds. Vitamin B12 is an essential nutrient for the human body, which helps in maintaining the health of nerves, red blood cells, and DNA synthesis. This therapeutic group is designed to provide an adequate amount of vitamin B12 to individuals who may have a deficiency or require supplementation. Vitamin B12 Plain is commonly used to treat conditions like pernicious anemia, neuropathies, and cognitive impairment, which are associated with a deficiency of vitamin B12.