how much b12 injection to take Are Vitamin Shots Right for You? Vitamin B12 Injection Dosage for

Vitamin B12 deficiency can lead to dementia, nerve problems, and brain fog

Intramuscular B12 injections bypass the digestive tract entirely, ensuring full bioavailability where oral supplementation may be insufficient or ineffective

That is the evidence gap, stated plainly: the mechanism is well-motivated and the preclinical signal is consistent, but no human study has confirmed that any of it translates to people, at any dose, by any route

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Similarly, if you use proton pump inhibitors or H2 receptor antagonists for acid reflux or peptic ulcers, your stomach acid levels may decrease, making it harder for your body to absorb B12 from your diet