b12 injection or supplement Vitamin Injections vs. Supplements: Which is Right for You? B12 Shots vs. IV Infusions:

It demands well-equipped machines and aseptic conditions to yield a high quality product

It is a coherent rationale

The average diet supplies about 5 to 15 mcg/day of vitamin B12 in a protein-bound form that is available for absorption after normal digestion

(See PRECAUTIONS.) Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever the solution and container permit (see HOW SUPPLIED)

In UK practice, monitoring is primarily based on clinical response rather than routine blood tests, as post-treatment serum B12 measurements can be misleadingly high and may not reflect tissue levels

Published trials used oral doses of 0.25 mg to 30 mg per day and intravenous single doses of 25 to 400 mcg/kg