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what happens if b12 injections don't work Vitamin Injection Side Effects and Safety Why Your B12 Shots Are
Description
However, for othersparticularly those with a more severe deficiency or underlying health conditionsit may take up to a week or even several weeks to experience significant changes

This manifests as cramping, bloating, or vague upper abdominal fullness
This keeps B12 levels up

Related Read: B12 Shots for Weight Loss: Benefits, Risks, and Efficacy Frequently Asked Questions How fast do B12 shots work

Nonogaki, K., Nozue, K
However, arthritis, back pain, and muscle pain may also occur after a vitamin B12 injection
