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After absorption, B12 is bound to transport proteins, 7580% to haptocorrin, which transports B12 in the blood, and 2025% to transcobalamin, which delivers B12 to the tissues, also referred to as active B12 or holo-transcobalamin
Note: If you currently receive B12 injections for a diagnosed medical condition, consult your healthcare provider before making any changes to your treatment plan.
My GP had my serum B12 retested and my serum MMA tested: as she suspected, I had functional B12 deficiency, a diagnosis confirmed by the testing laboratory, which means that high levels of both in the bloodstream are due to them not making the connection necessary to transport the B12 to cells and tissues
Vitamin B12 found naturally in meat, eggs, and dairy products but available as a supplement is essential for nerves and the red blood cells that carry oxygen around the body
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