People with a history of allergy to cobalamin should avoid taking vitamin B12
Vitamin B12 is primarily found in animal-based foods, including beef, salmon, yogurt, and milk, though some plant-based foods, like nutritional yeast, are fortified with it
Can injectable vitamins be combined with other treatments
Several studies have shown that intramuscular and intravenous B12 delivery is more effective than oral supplementation in people with deficiency or poor absorption
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