Because autoimmune gastritis is a chronic, lifelong condition, your body will never regain the ability to absorb B12 from food normally [1] [5]
Vitamin B12 requirements are generally lower and may increase during pregnancy or in cases of malabsorption
Prioritizing 7 to 9 hours nightly improves energy more reliably than supplementation

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Understanding how B12 shots work sets the stage for comparing them with IV infusions