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At 5mg every 5 days over 20 days, timed before bed and prescribed to patients who are already physically active, it is among the most precisely structured protocols we offer at our Doral, FL clinic

The effects of a vitamin B12 shot usually last between 48 and 72 hours after the injection, but since each body is different, the duration may vary.

What Does Vitamin B12 Actually Do in Your Body

Note: We recommend pairing with lab testing to assess your baseline D3 levels

Side Effects & Warnings Common Side Effects: Mild injection site irritation, swelling, or redness, especially if injected IM/SC

They play a pivotal role in energy production and the formation of red blood cells