where to administer a b12 injection Best Vitamin Sites: Inject B12 · PA Relief Vitamin C and B12 Injection
Description
In the initial week of treatment, we may recommend five to seven injections, depending on the severity of your vitamin B12 insufficiency

If your doctor is on our side (I know that some are) please ask them to support this petition and share it with their colleagues
Another thing to remember about vitamin B12 is that it is a water-soluble vitamin

This phenomenon, sometimes called tolerance or tachyphylaxis, is not well-studied specifically for semaglutide, but it is reported frequently in practice

Oral vitamin B12 may be appropriate for some people with dietary insufficiency, mild deficiency, or adequate absorption