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what is the benefits of b12 injection Vitamin Injections | Energy Boost Are B12 Shots Safe? Royal
Description
If you are deficient in B-12, it is recommended that you receive the B-12 injection once daily for 6-7 days (depending on the dose)

doi:10.1186/s12944-018-0779-4

Drugs in Pregnancy and Lactation 8th Edition: A Reference Guide to Fetal and Neonatal Risk

If your B12 is really low, it might take a few more days before the tiredness fades away

You may see modest weight reduction after 4-8 weeks when combined with proper diet and exercise