b12 injection in hip is it painful How to self-inject intramuscular vitamin - Overview How to Give B12 Injections
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Reasoning: This was a highly significant switch in 2017

A color change within the same vial over time is different and concerning

Avoid the inner buttocks completely because of the sciatic nerve risk
The subcutaneous route is good for those who cant get intramuscular shots or have certain health issues

J Hypertens

Not everyone needs to reach the highest doses
