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A member asked:
Can strenuous exercise cause b12 deficit?
A doctor has provided 1 answer
No.: The liver stores a 3-year supply of vitamin b12. True vegan vegetarians may need a supplement or vitamin B12 fortified food. In pernicious anemia diagnosed in 1% of people over age 60, impaired production of intrinsic factor interferes with B12 absorption. Complications of gastro-intestinal surgery (bypass, stapling), small intestine bacterial overgrowth and tropical sprue can cause b12 deficiency.
Answered 1/5/2019
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