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Also, its slightly slower than intramuscular administration
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People with normal liver function store 50% of their vitamin B12 in their liver, so if your liver is not functioning properly, you may need more vitamin B12 shots than those whose livers are working as designed
Orally-swallowed B12 tablets are just as effective as injections in the vast majority of patients, except those with digestive issues that may hamper absorption
For IM injections, a 22 to 25 gauge needle is typically used
B12 shots can help restore healthy B12 levels more quickly than oral supplements because they bypass the digestive tract and absorption process
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