Some symptoms of vitamin B12 deficiency include: Weakness and tiredness Pale or yellowish skin Loss of appetite Heart palpitations Mouth or tongue soreness Tingling or "pins and needles" sensation in your hands and feet Shortness of breath Dizziness Blurry vision Mood swings or personality changes You are more at-risk for developing vitamin B12 deficiency if you are: Pregnant Over 65 Vegan Take medicine for diabetes Take medicine for heartburn Have had surgery to remove part of your bowels Medically Reviewed on 6/23/2026 Mayo Clinic: "Vitamin B-12." National Institutes of Health: "Vitamin B12." Oregon State University: "Vitamin B12." Top What Happens if You Take Too Much Vitamin B12 Related Articles 22 Healthy Foods High in B VitaminsAny deficiency of B vitamins can lead to various health conditions
PubChem CID 92432 records molecular formula C 50 H 69 N 15 O 9 , MW 1024.2 g/mol, and monoisotopic mass 1023.54026884 Da
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doi: 10.3389/fendo.2024.1346082 Received 28 November 2023 Accepted 29 May 2024 Published 25 June 2024 Volume 15 - 2024 Edited by Seerapani Gopaluni, University of Cambridge, United Kingdom Reviewed by Carolina Dalmasso, University of Kentucky, United States Marianna Ranieri, University of Bari Aldo Moro, Italy Updates Copyright 2024 Calvi, Bongrani, Verzicco, Figus, Vicini, Coghi, Montanari and Cabassi
These disorders are referred to as combined remethylation disorders [2, 3]