PubMed Tkalcevic, V.I., Cuzic, S., Brajsa, K., Mildner, B., Bokulic, A., Situm, K., Perovic, D., Glojnaric, I., & Parnham, M.J
Bioavailability of oral formulations is typically 1-3% compared to near 100% for subcutaneous injection
Brief History and Development of Methylcobalamin Injection The practical use of methylcobalamin started in the middle of the century as its better absorption became more acknowledged over time
Active adults dealing with stubborn muscle tears or post-workout recovery may explore it alongside their existing rehabilitation
However, approximately 1% of any oral dose is absorbed passively through diffusion across the intestinal mucosa, regardless of intrinsic factor