The amount of vitamin B12 you have in storage in the liver is measured by the serum level of B12 haptocorrin a storage protein that circulates in the blood. The level of B12 haptocorrin in the blood. The level of B12 haptocorrin in the blood corresponds to the level of B12 in storage. The normal level is approximately 180 pictogram (pg) of B12 haptocorrin per milliliter of blood. Less than 100 pg per milliliter of blood is a sign of vitamin B12deficiency anemia.
If absorption is still abnormal after adding intrinsic factor, then the problem interfering with absorption is probably in your small intestine. Your physician must find out what the problem is. He or she may search further personally, or refer you to a specialist usually a gastroenteritis.
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