They're usually administered in the upper arm or thigh, and while it's a quick prick, it's generally well-tolerated
Vitamin B12 shots may help lower your osteoporosis risk, especially if other risk factors, like menopause, apply to you
What Vitamin B12 Does in Your Body Your body uses vitamin B12 for some genuinely important work
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Vitamin B12 boosts energy levels and metabolism, but it will never work unless you do something about it, which is still proper diet and exercise