what if b12 injections don't work Are the Benefits of Vitamin Injections? Vitamin B12 Deficiency - Harvard

Direct delivery into circulation allows the peptide to reach target tissues without the absorption loss associated with oral forms

The disadvantage is that your starting dose of 0.25 mg requires drawing only 5 units, which is a very small amount that can be difficult to measure precisely on larger syringes

So are B12 shots the answer to restoring health in those with low levels

S., & McElroy, S

Given that it has two different mechanisms of action, it appears to have a more significant effect on weight and blood sugar than GLP-1 agonist drugs alone, such as semaglutide or liraglutide, which are both currently FDA-approved for sugar and weight control under different trade names