vitamin b12 injections still tired Injection | Causes of Fatigue and Energy Support Feeling worse after B12 Injection:
Description
When results fall in this borderline range, a methylmalonic acid test is recommended to confirm whether a functional deficiency exists

There are also foods fortified (supplemented) with B12 including breakfast cereals, nutritional yeast and infant formulas
Thats when injections become the most effective route, delivering B12 directly into your system to bypass the problem
If so, a B12 injection training course may be just what you need