Lets do my first B12 injection together This is something Ive been nervous about for a long time, but today I finally did itand it honestly wasnt bad at all. I used the Union Medico needle guide Evaluation of a New Sublingual Methylcobalamin Dosage Regimen for Childhood Vitamin B12 Deficiency How Long Does a Vitamin B12 Injection's Benefit Last? DripGym William Vitamin B12 is absorbed through two pathways. The first is intrinsic factor, a protein produced by parietal cells in the stomach. IF binds B12 in the small intestine and carries How to Give Yourself a Subcutaneous Injection: An Introduction YouTube How to judge the absorption of vitamin B12