can b12 injections be toxic Do Help with Fatigue and Low Energy? What Are The 4 Stages

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B vitamins are involved in energy production, metabolism, nervous system function, and overall cellular health

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[PMC free article: PMC7330478] [PubMed: 32470975] Substance Identification Substance Name Vitamin B 12 CAS Registry Number 68-19-9 Drug Class Breast Feeding Milk, Human Vitamin B Complex Vitamins Disclaimer: Information presented in this database is not meant as a substitute for professional judgment

it's an autoimmune condition where the body mistakenly attacks and destroys a protein called intrinsic factor