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PMID: 126 Picchianti-DiamantiAPanebiancoCSalemiSSorgiMDi RosaRTropeaAet al

Homocysteine, folate, and vitamin B-12 in mild cognitive impairment, Alzheimer disease, and vascular dementia

As you can see, there's a lot to consider when deciding between vitamin B12 injections vs pills

Taylor Graber, MD, resident physician and anesthesiologist at the University of California San Diego, told Live Strong: A significant B12 deficiency can lead to peripheral neuropathy and autonomic dysfunction, where the blood vessels dilate. READ MORE: Vitamin B12 deficiency symptoms: Does your tongue look different

People considering this treatment may worry: Does Vitamin B12 injection hurt

This guide covers laboratory preparation only, under research-use-only terms