Vitamin B12, vitamin B12, or vitamin B-12, also called cobalamin, is a water-soluble vitamin with a key role in the normal functioning of the brain and nervous system, and for the formation of blood. It is one of the eight B vitamins. It is normally involved in the metabolism of every cell of the human body, especially affecting DNA synthesis and regulation, but also fatty acid synthesis and energy production. Neither fungi, plants nor animals are capable of producing vitamin B12. Only bacteria and archaea have the enzymes required for its synthesis, although many foods are a natural source of B12 because of bacterial symbiosis, Royal Flush.
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Pernicious anemia, allergies, asthma, canker sores, atopic dermatitis, diabetic neuropathies, sciatica, fatigue, depression, insomnia, herpes zoster (shingles), psoriasis
