Insulin syringe (U-100) The most common syringe for peptides
We test as needed after that
Common signs of B12 deficiency include fatigue, weakness, pale skin, shortness of breath, numbness or tingling in the hands and feet, difficulty maintaining balance, and cognitive issues like memory problems
From the above section, it is clear that the human body is unable to use the plant-based form of vitamin B12, which means that vegetarians and vegans are at high risk of developing a deficiency in this vitamin
So best bet would be to continue with that while also looking for another cause
I have contacted them many times with questions and they are as nice as can be and so helpful