can b12 injections make you jittery Vitamin for Anxiety & Mood: What Science Says Vitamin B12 Injections: Hot Shots?
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M., Busquets, S., Stemmler, B

So, its hard to overdose on folate

Beneficial for Restricted Diets especially for those following vegetarian, vegan, or other restricted diets that may lack sufficient B12

Or are they basing it on the original term, since you showed signs of anemia in your blood