Upper arm: This site is best for young or middle-aged adults
Many cyanocobalamin injection products are stored at room temperature and protected from light, but the dispensed label is the controlling source
Other conditions that can cause issues with fat absorption include Crohns disease, pancreatitis, liver disease, exocrine pancreatic insufficiency (EPI), or cancers of the pancreas, liver, or bile duct
The commonly discussed amounts differ greatly and should not be treated as equal or directly converted
Therefore, there is a very low risk of B12 toxicity, even at high doses like 1,000 mcg a day
Vitamin B12 injections require a prescription and are used under provider supervision