Routine checkups typically dont test for it, and many symptoms associated with MTHFR mutations are misunderstood or misdiagnosed
I can't see any blood test results for iron eg ferritin or any other iron tests
Serious reactions are rare, but an allergic reaction is possible with any injection, which is another reason a first dose in trained hands is sensible
Ever since B12 emerged in the 60s, when it was often mixed with amphetamines, and then later, when everyone from Madonna to Margaret Thatcher was trying it out, its efficacy has been the subject of debate
When hypervitaminosis, the drug is discontinued and symptomatic therapy is prescribed
Only your doctor can get a B12 shot