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You have low levels of vitamin B12 in your blood
Non response to B12 injections should therefore necessitate re-evaluation and consideration of other diagnoses
Both are safe
Vitamin B12 injections bypass the digestive tract and deliver cobalamin directly into muscle or fatty tissue, which is why healthcare providers often recommend them for people with pernicious anemia, malabsorption conditions, gastric bypass history, strict plant-based diets, or age-related B12 decline
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