b12 injections the needle vegan Benefits Of B-12 For Vegans & Vegetarians Vitamin B12 Injections - Active
Description
You can try to use your primary care physician as long as you use the recommended settings above but beware: Most physicians are not used to dosing vitamins and are very unfamiliar with them in general

You may see "peach fuzz" or baby hairs appearing around the hairline and other thinning areas

What Are Vitamin B12 Injections Used For

Anxiety or Restlessness Anxiety Nervousness Difficulty sleeping Restlessness 5

The combination of a PPI and metformin would absolutely require regular laboratory tests for vitamin B12
The NHS hypokalaemia overview explains why it matters, and clinical references such as StatPearls on B12 deficiency treatment specifically flag monitoring potassium during the early loading phase in people who were severely deficient