The vitamin can be stored in the liver for a long time, so it may take a few years for a deficiency to develop ( Summary Vitamin B12 is a water-soluble vitamin that plays an important role in brain function and red blood cell production
Frequency depends on your baseline B12 status and your goals
Allow the vial to reach room temperature, sterilise the stopper of both the compound vial and the bacteriostatic water vial with an alcohol swab, then draw the diluent into a sterile syringe and add it to the vial
Our service provides our customers with safe access to premium, vitamin B12 Methylcobalamin, from 20 per shot
Further detail about this, if you like that sort of thing: These pharmacies are generally certified through the Pharmacy Compounding Accreditation Board (PCAB)
The European Food Safety Authority (EFSA) sets the adequate intake (AI) for adolescents and adults at 4 g vitamin B12 per day