Vitamin B12 deficiency historical perspective: Difference between revisions
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{{Vitamin B12 deficiency}} | {{Vitamin B12 deficiency}} | ||
{{CMG}} | {{CMG}} | ||
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=== Common Causes === | |||
Vitamin B 12 deficiency may be caused by: | |||
== | === Decrease intake === | ||
* Strict vegan diet more than 3 years . | |||
* Breast fed infants of pure vegan may also develop deficiency . | |||
* Malnutrition most likely happen in elderly patients. | |||
== | === Malabsorption === | ||
* Decrease intrinsic factor due autoimmune destruction of parietal cell | |||
* | * Decrease Gastric acid production due to proton pump inhibitor and histamine 2 receptor antagonists | ||
* Gastric by pass surgery because intrinsic factor is produce by parietal cell of stomach | |||
* Tapeworm (Diphyllobothrium latum ) ingested from contaminated fish , tapeworm saps nutrients | |||
* Crohn's disease | |||
=== Increased requirement === | |||
* | * pregnancy | ||
==References== | ==References== | ||
Revision as of 02:29, 29 April 2018
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Vitamin B12 deficiency Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Vitamin B12 deficiency historical perspective On the Web |
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American Roentgen Ray Society Images of Vitamin B12 deficiency historical perspective |
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Risk calculators and risk factors for Vitamin B12 deficiency historical perspective |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
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Common Causes
Vitamin B 12 deficiency may be caused by:
Decrease intake
- Strict vegan diet more than 3 years .
- Breast fed infants of pure vegan may also develop deficiency .
- Malnutrition most likely happen in elderly patients.
Malabsorption
- Decrease intrinsic factor due autoimmune destruction of parietal cell
- Decrease Gastric acid production due to proton pump inhibitor and histamine 2 receptor antagonists
- Gastric by pass surgery because intrinsic factor is produce by parietal cell of stomach
- Tapeworm (Diphyllobothrium latum ) ingested from contaminated fish , tapeworm saps nutrients
- Crohn's disease
Increased requirement
- pregnancy