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One simple blood draw at a lab near you
Withdraw the needle, apply light pressure with a cotton ball or gauze if there is any bleeding, and dispose of the syringe in a sharps container
If you have questions about what water to use, such as if it is not indicated on the label, call your doctor
[1] [3] The active ingredient, ascorbic acid, is a water-soluble vitamin essential for numerous physiological functions, including collagen synthesis, antioxidant defense, and immune support
A normal serum level of vitamin B12 in your bloodstream is generally between 200 and 900 picograms per milliliter (pg/mL)
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