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Vitamin B12
Vitamin B12 Full Name
Vitamin B12
Vitamin B12 Introduction
Vitamin B12, also called cobalamin, is a water-soluble vitamin that plays a crucial role in metabolism. It is one of the eight B vitamins and is necessary for DNA synthesis, as well as the metabolism of fatty acids and amino acids. Animals require vitamin B12 as a cofactor in these processes. It is essential for the normal functioning of the nervous system, contributing to the synthesis of myelin, and for the maturation of red blood cells in the bone marrow, which is important for the circulatory system. Unlike plants, animals need cobalamin, but plants can carry out similar reactions using different enzymes.
Vitamin B12 is the most chemically complex among all vitamins and is obtained from animal-derived foods or supplements since humans cannot synthesize it on their own. Vitamin B12 deficiency is common, particularly in populations with limited animal food consumption, such as those with low socioeconomic status or following vegan diets. Food sources of vitamin B12 include meat, liver, fish, eggs, dairy products, and fortified breakfast cereals. Vitamin B12 is absorbed in the small intestine with the help of a protein called intrinsic factor, which is produced in the stomach. Intrinsic factor binds to vitamin B12, allowing it to be absorbed into the bloodstream. Once absorbed, vitamin B12 is transported to various tissues and organs, where it is utilized in enzymatic reactions for DNA synthesis and other essential cellular processes.
Impaired absorption, often caused by a loss of gastric intrinsic factor or reduced stomach acid production, is a major cause of vitamin B12 deficiency in developed countries, and long-term use of antacids can also increase the risk. Vitamin B12 deficiency can lead to symptoms such as fatigue, anemia, neurological issues, poor appetite, depression, and irreversible nerve damage. Pregnant women with a deficiency may face an increased risk of spontaneous abortion, congenital malformations, and impaired brain development in the unborn child. Supplementation or consumption of foods fortified with vitamin B12 is recommended for individuals at risk of deficiency. Vitamin B12 injections or high-dose oral supplements may be prescribed for individuals with severe deficiencies or conditions that impair absorption. Regular monitoring and adequate intake of vitamin B12 are crucial for maintaining overall health and preventing deficiency-related complications.
Alternate Names for Vitamin B12
Vitamin B12; vitamin B12; vitamin B-12; cobalamin
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