Cobalaminas

Cobalaminas, also known as vitamin B12, is an essential water-soluble vitamin that plays a crucial role in various physiological processes. It is a generic term for a group of chemically similar compounds that share the same biological activity. The primary form of vitamin B12 found in food is cyanocobalamin, while the form used in supplements is often hydroxocobalamin or methylcobalamin.

Vitamin B12 is involved in the production of red blood cells, the maintenance of the central nervous system, and the synthesis of DNA. It is particularly important for preventing megaloblastic anemia, a condition characterized by large, immature red blood cells. The vitamin also aids in the metabolism of every cell in the human body, including the production of myelin, a protective sheath that covers nerve fibers.

Deficiency of vitamin B12 can lead to various health issues, including pernicious anemia, neurological problems, and weakness. It is often associated with malabsorption syndromes, such as those caused by celiac disease or Crohn's disease, as well as with vegan diets, which may lack adequate sources of the vitamin.

The recommended dietary allowance (RDA) for vitamin B12 varies by age and gender. For adults, the RDA is 2.4 micrograms per day. Pregnant women and breastfeeding mothers have higher RDAs to support the increased demand for the vitamin.

Vitamin B12 is typically found in animal products such as meat, fish, eggs, and dairy. Plant-based sources are limited and often fortified in foods like cereals and nutritional yeast. Supplements are available for individuals at risk of deficiency or who follow restrictive diets.