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does b12 need to be injected Best Vitamin Injection Sites Benefits of B12 Injections for
Description
Microscopic studies have identified lesions of the articular cartilage following 30 day treatments at either 5 15 or 25 mg/kg in this age group

If you inject I.M
In short, the answer is yes, especially when compared to taking supplements by mouth

Insert with a quick, smooth motion