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Measurable body composition changes usually become apparent by weeks 2-4, with progressive improvements continuing through weeks 4-12 of consistent use
Further assessments are needed to evaluate potential liver damage if the virus is found
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
Vitamin B12 deficiency can occur due to a variety of factors that affect intake, absorption, or the bodys ability to utilize the vitamin properly
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