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Most people having B12 injections (intramuscular) will see an improvement in the first 24 hours, but the hematological response, including the quick production of new red blood cells, may take several days to months for a full response
8 Why does this matter
About this article Cite this article Zhang, Jj., Wu, Zb., Cai, Yj
IV therapy works by delivering fluids, vitamins, minerals, and other necessary substances directly into the bloodstream through an intravenous line, or a small tube inserted into a vein
Vitamin C can help convert it back into its active, reduced state
This limits your safe laboratory testing window to less than 24 hours before bacterial contamination risks arise
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