vitamin b12 deficiency anemia require injections monthly What You Need to Know About Best Vitamin B12 Injection Site:
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Also, if you experience any of the deficiency symptoms listed above, let your provider know

Main sources of this vitamin are found in animal products, like meat and eggs

Your prescriber may keep you at the initial daily SubQ level longer or step you up, depending on your goals and how you feel during and after administrations

Your doctor will likely recommend that you use a backup method, for example condoms, during the treatment and for at least a month afterward [4]
