The most common B12 subcutaneous injection sites are the following: The upper arm To self-administer a B12 injection into the arm, pinch a thick skin layer of the side or back of the upper arm and insert the needle at a right angle
There are no significant restrictions, but you should avoid vigorously massaging the injection site for a few hours
Do you feel sluggish throughout your day
A warm or flushing sensation near the injection area
After diagnosis, close monitoring is essential and any adverse reactions should be promptly reported to effectively diagnose and manage allergies
While the NIH does not specify a tolerable upper intake level for vitamin B12, a study published in the JAMA Network Open found that high intakes of vitamin B12, such as from daily supplementation of 25 micrograms or higher, increased the risk of bone fracture [3] [4]