is b12 a subcutaneous injection How to self-inject intramuscular vitamin - Overview How to Give B12 Injections
Description
You've had bypass surgery for weight loss, which removes part of your stomach

This usually involves: 1,000 mcg of B12 injected daily or every other day for 1-2 weeks Followed by weekly injections for a month 2

B12 deficiency can make you feel unusually irritable, anxious, or down

According to the NIH Office of Dietary Supplements, absorption issuesnot intake aloneare a leading cause of low B12 levels