do b12 injections work straight away Vitamin shots: Uses, benefits, and side effects How to Give a B12
Description
This makes vitamin B12 injections an alternative option for those who need a quick and immediate boost of the vitamin
$350.00 every 4 weeks An injectable blend of Tirzepatide for metabolic health and Vitamin B12 for energy support

If anemia is due to B12 deficiency, injections can help

This suggests to me that the absorption under the tongue is not as good as most people think
