can b12 injections cause polycythemia Erythrocyte Vitamin Activity in Health, Polycythemia, and in Deficiency of Vitamin B12 and Folate Supplements for Polycythemia Vera: 5

Tablets or sublingual forms may be suitable in milder cases

Our intent is to standardize the lookback period to improve comparability without distorting the data with a longer lookback period or creating unnecessary blanks in the MRF with a shorter lookback period

Key Takeaways: B12 shot effects stay for about one to two weeks Some people notice benefits lasting up to a month If absorption is an issue, weekly injections might be necessary Energy, mood, and metabolism can improve at different paces Your past health impacts how long the effects stay

If cause and severity are mild vitamin B12 deficiency may be managed via diet change or oral B12 supplements, especially if the cause of deficiency is poor intake