PLoS ONE 10 , e0126910 (2015)
Disturbed Vision: B12 deficiency can cause nervousness system damage to the optic nerve
Symptom Relief B12 injections may help alleviate or improve symptoms associated with conditions such as anemia, sciatica, asthma, insomnia, and seasonal allergies
Needle gauge matters too: a finer needle (commonly 29-31 gauge for insulin syringes) reduces the mechanical stress placed on the solution as it passes through the needle bore compared to a larger-bore needle, and produces a smaller, cleaner puncture through the vial's rubber stopper, reducing the risk of coring small rubber fragments breaking off into the solution
These can be shared electronically or in print, with a clinician available to explain any findings and guide your next steps
What size gauge needle is needed for vitamin B12 (cobalamin) injections?