methylcobalamin b12-injections-side effects What Is B12 Injection What's all the Buzz About Vitamin B12 Shots? Feeling worse after B12 Injection:
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Fortunately, this is not true

Thats why B12 is so important for making these cells

6 However, it must be noted that patients with severe neurological deficits or critically low levels of vitamin B12 should be treated with parenteral therapy, to ensure rapid replenishment of body stores to prevent irreversible consequences
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