When this complex reaches the duodenum, pancreatic enzymes release the B12, which then binds to intrinsic factor, a glycoprotein secreted by gastric parietal cells
Pharmacokinetics: Cyanocobalamin is administered intranasally, orally, and parenterally, while hydroxocobalamin is administered only parenterally. Once absorbed, vitamin B12 is highly bound to transcobalamin II, a specific B-globulin carrier protein and is distributed and stored primarily in the liver as coenzyme B12. The bone marrow also stores a significant amount of the absorbed vitamin B12. This vitamin crosses the placenta and is distributed into breast milk. Enterohepatic recirculation conserves systemic stores. The half-life is about 6 days (400 days in the liver). Elimination is primarily through the bile; however, excess cyanocobalamin is excreted unchanged in the urine
Lipolysis: cellular mechanisms for lipid mobilization from fat stores
This is where opting for Vitamin B12 injections becomes a practical solution
Researchers observed that the peptide stimulates lipolysis in preclinical adipocyte models through a mechanism distinct from full-length growth hormone signaling