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The classic symptoms of B12 deficiency are persistent fatigue, tingling or numbness in the hands and feet, problems with memory and concentration, mouth ulcers, a sore red tongue, and pale or yellow-tinged skin
In the United States, the Food and Drug Administration (FDA) requires that peptides be either FDA-approved or compounded by licensed pharmacies
Cyanocobalamin or methylcobalamin, based on your needs and availability
A common protocol for patients with a B12 deficiency may be 1,000 mcg daily for one week, then the same dosage once weekly, and then the same dosage once per month after the deficiency has been addressed
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