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Though uncommon, vitamin B12 may sting a little on injection, though this is usually a short-lived side effect
B12 shots start to work much faster than vitamins taken orally
Injections bypass the digestive tract, which makes them more effective for people with absorption issues or severe deficiencies
Do not switch between injections and tablets or stop prescribed treatment without advice from the clinician responsible for your care
4,1316 Women at high risk or with known deficiency should supplement with vitamin B 12 during pregnancy or while breastfeeding
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