B12

Vitamin B12 is an important nutrient used by the body to make DNA, support normal red blood cells, and keep the nervous system working properly. It also helps with key chemical reactions that affect energy use and how certain molecules are processed inside cells. Researchers study B12 in areas such as blood-cell formation, nerve health, myelin, homocysteine, and one-carbon metabolism. Different forms of B12 can behave differently, so the exact form matters in a research setting. B12 remains one of the most important compounds for studying the link between nutrition, blood, nerves, and cell chemistry.