Users of Certain Medications : Long-term use of Proton Pump Inhibitors (PPIs) , H2 Receptor Antagonists , and the diabetes drug Metformin can reduce B12 absorption
Vitamin D Injection Therapy Vitamin D is found in cells throughout the body and is needed for maintenance of strong bones, immune system function, neuromuscular function, improving mood regulation, protecting the brain against toxic chemicals, and potentially reducing pain
Possible side effects can include stomach upset, nerve damage, and skin conditions
[2] For this reason, elevated serum homocysteine over 15 micromol/L and methylmalonic acid (MMA) over 0.271 micromol/L are considered better indicators of B 12 deficiency, rather than relying only on the concentration of B 12 in blood
Wear loose clothing that allows easy access to the injection site (typically the upper arm)