Poor oral bioavailability, though, so best to take acetylated glutathione or liposomal
Laptikhovsky V, Moreno A, Oesterwind D, Perales-Raya C, Pierce G, Robin J-P, Sobrino I, Valls M, Villanueva R, Allen A, Abad E, Bello G, Bobowski BTC, Fernndez-lvarez F, Cabanellas-Reboredo M, Gonzlez ngelF, Hernndez-Urcera J, Krstulovi ifner S, Lefkaditou E, MacLeod E, Valeiras Mota J, Onsoy B, Pereira J, Salman A, Seixas S, Power AM (2025) The reproductive ecology of Loligo squids (Cephalopoda: Myopsida) in Lusitanian Zoogeographical Province
This problem has been solved by the development of a tool called (systematic evolution of ligands by exponential enrichment) SELEX [236,237,238], which emerged as a powerful approach to address this limitation
Since the body cannot produce vitamin B12 itself, it is dependent on absorption through food