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The needle impacts the pain receptors situated within the subcutaneous layer
Most patients notice appetite changes within a few weeks
B12 supplements contain only cobalamin, typically in doses from 50 to 1,000+ micrograms, used for confirmed or suspected B12 deficiency
Rotate sites and clean with alcohol
Side Effects and Safety Profile Reported side effects at standard 250-500 mcg dosing are mild and infrequent: injection site redness, mild fatigue, headache, and occasional nausea at higher oral doses
Injections are particularly beneficial for those who are pregnant, who may follow a vegetarian or vegan diet, as it can more accurately ensure that both mum and baby are getting the right volume that they need
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