b12 injection palpitations Vitamin Deficiency: A Fact Sheet on Signs, Treatment and Benefits Vitamin B12 Injections: Hot Shots?
Description
It is important to distinguish between excessive supplementation and pathologically elevated B12 levels, which may indicate underlying haematological disorders, liver disease, or renal impairment rather than true overdose

The 2,400 mg dose of garlic was more effective than clopidogrel for inhibiting platelet response to some but not all thrombotic triggers

But the symptoms you're attributing to high B12 are real, and they're worth investigating
Another study shows that the low side of vitamin B12 can lead to poor memory performance

Your doctor will run more tests to try to find the cause
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