half life of b12 injection Injections for Energy: How do they work? who is most at risk for developing this deficiency Oral vs. Intramuscular Vitamin B12

The immune system attacks intrinsic factor, the stomach protein needed to absorb B12

Mol Genet Genom Med

Huang ZH, Reardon CA, Mazzone T

Options include: Changing from one oral tablet formulation to another with different excipients Discussing sublingual preparations as an alternative (though evidence doesn't suggest superior absorption to oral tablets) For those on injections, checking the specific product's SmPC for excipient information In the UK, hydroxocobalamin injection is the licensed first-line treatment for B12 deficiency requiring parenteral therapy

Make sure to speak with a physician about vitamin B12 shots (including lipotropic weight loss shots).