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Side effects. Possible side effects of cyanocobalamin injection include allergic reactions such as hives, difficult breathing; redness of the face; swelling of the arms, hands, feet, ankles or lower legs; extreme thirst; and diarrhea. Less-serious side effects may include headache, dizziness, leg pain, itching, or rash.
6% (< 60 years old), 20% (> 60 years old) [ 4 ] Vitamin B12 deficiency, also known as cobalamin deficiency, is the medical condition in which the blood and tissue have a lower than normal level of vitamin B 12. [ 5 ] Symptoms can vary from none to severe. [ 1 ] Mild deficiency may have few or absent symptoms. [ 1 ]
Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. [2] It is one of eight B vitamins. It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. [3]
B12 deficiency is caused by a lack of dietary B12 or pernicious anemia, which affects B12 absorption. To treat a B12 deficiency, you may need to get B12 injections or take a supplement.
Vitamin B12 injections are generally safe, with few side effects and the possibility of allergic reactions. Depending on your health and weight journey, ...
Registered dietitians explain what vitamin B12 is, how much you need, and the potential side effects of taking too much.