syringe for b12 injection Is It Okay To Use A With Insulin Syringes? What Size Needle for B12

The manufacturer explicitly advises keeping the vial in the carton to shield it from light

The Institute of Medicine reports that no adverse effects have been associated with excess vitamin B12 intake from food, supplements, or injections in healthy individuals. Nevertheless, its crucial to consult a professional before beginning any high-dosage supplement

Serum vitamin B12 levels are routinely measured to diagnose vitamin B12 deficiency

In most cases, yes

Oral supplementation has shown effectiveness but may not match the efficacy of IM in certain scenarios

It has also been helpful in certain types of arthritis, asthma, infertility, multiple sclerosis, shingles and ringing in the ears