These recommendations are for the cyanocobalamin form of B12 onlythe form in fortified foods and most supplements
These extremely rare side effects include: Reactive thrombocytosis during the first week of use in megaloblastic anaemia Hypersensitivity reactions including: rash, itching, exanthema, antibodies to HYDR0XOCOBALAMIN-transcobalamin II Anaphylaxis Hypokalaemia Headache, paraesthesia, tremor Irregular heartbeat (arrhythmias secondary to hypokalaemia) Nausea Vomiting Diarrhoea Fever, chills, hot flushes, dizziness, malaise, pain and / or swelling at the injection site Acne Abnormal colouration of the urine (chromaturia) B12 injections work quickly
They consist of digestive secretions, immune molecules, cell products like cytokines, inflammatory mediators and antimicrobial peptides, mainly produced by Paneth cells in the crypts of the small intestine
It remains possible that the DNA binding activity of PDS5B serves RAD51-independent roles as well