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2. Vitamin B12 - Wikipedia

   en.wikipedia.org/wiki/Vitamin_B12

   Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. [2] It is one of eight B vitamins. It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. [3]

3. Intrinsic factor - Wikipedia

   en.wikipedia.org/wiki/Intrinsic_factor

   Intrinsic factor (IF), cobalamin binding intrinsic factor, [5] also known as gastric intrinsic factor (GIF), is a glycoprotein produced by the parietal cells (in humans) or chief cells (in rodents) of the stomach. It is necessary for the absorption of vitamin B 12 later on in the distal ileum of the small intestine. [6]

4. Vitamin B12 deficiency - Wikipedia

   en.wikipedia.org/wiki/Vitamin_B12_deficiency

   Vitamin B12 deficiency, also known as cobalamin deficiency, is the medical condition in which the blood and tissue have a lower than normal level of vitamin B 12. [5] Symptoms can vary from none to severe. [1] Mild deficiency may have few or absent symptoms. [1]

5. The Top Signs You Have a Vitamin B12 Deficiency - AOL

   www.aol.com/top-sign-vitamin-b12-deficiency...

   Malabsorption. There are a few reasons your body may not be able to absorb sufficient amounts of B12. If you’ve had gastric bypass surgery, your new alimentary pathway may bypass the section of ...

6. How to recognize the signs and symptoms of vitamin B12 ... - AOL

   www.aol.com/news/recognize-signs-symptoms...

   24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in. Mail. ... B12 deficiency is caused by a lack of dietary B12 or pernicious anemia, which affects B12 absorption.

7. Pernicious anemia - Wikipedia

   en.wikipedia.org/wiki/Pernicious_anemia

   Treatment using oral drugs is an easier option in management but the bioavailabity of B12 is low. This is due to low absorption in the intestine, and breakdown by enzyme activity. Research continues to focus on the use of permeation enhancers or permeation absorbers in combination with the treatment.

8. Is It Possible to Take Too Much B12? Here's What ... - AOL

   www.aol.com/lifestyle/possible-too-much-b12-here...

   Registered dietitians explain what vitamin B12 is, how much you need, and the potential side effects of taking too much. ... 24/7 Help. For premium support please call: 800-290-4726 more ways to ...

9. Schilling test - Wikipedia

   en.wikipedia.org/wiki/Schilling_test

   Schilling test. The Schilling test was a medical investigation used for patients with vitamin B 12 (cobalamin) deficiency. [1] The purpose of the test was to determine how well a patient is able to absorb B12 from their intestinal tract. The test is now considered obsolete and is rarely performed, and is no longer available at many medical centers.