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What is the recommended needle size for intramuscular B12 injections
If any other adverse side effects are experienced
Unlike oral supplements, vitamin injections bypass the digestive system, allowing nutrients to be delivered directly into the bloodstream
While all studies adequately ascertained exposure and ensured comparability between outcome groups by controlling for confounders, 42% (n = 5) did not provide adequate sample representativeness and size, and 17% (n = 2) did not report the non-response rate
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