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A comment on A ‘delayed infection’ theory of childhood leukaemia. Parent comment

Re:A ‘delayed infection’ theory of childhood leukaemia by rconti on Monday May 21, 2018 @02:06PM (#17120388)
Why did the B12 pass through their system in the first place? Or is the B12 somehow generated on the way out?
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Re:A ‘delayed infection’ theory of childhood leukaemia by libdong on Monday May 21, 2018 @02:16PM (#17120450)
It's produced by bacteria in the intestines, but not absorbed during the first pass through.
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Re:A ‘delayed infection’ theory of childhood leukaemia by lisper on Monday May 21, 2018 @02:31PM (#17120568)
Why would it be absorbed any better the second time around?

(This thread is making me feel queasy.)

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Re:A ‘delayed infection’ theory of childhood leukaemia by libdong on Monday May 21, 2018 @02:50PM (#17120747)
Like others have said, it takes time for B12 to be produced in significant quantities, and by that time it has passed the small intestine where it can be absorbed.
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Re:A ‘delayed infection’ theory of childhood leukaemia by sndean on Monday May 21, 2018 @02:36PM (#17120622)
I'm not sure, but dogs have significantly shorter (looking quickly, 1/4 the length?) digestive tracts than we do. Less surface to absorb things.
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Re:A ‘delayed infection’ theory of childhood leukaemia by londons_explore on Monday May 21, 2018 @02:37PM (#17120627)
probably produced too late in the process...

Rabbits for example re-eat every piece of faeces because the digestion of grasses take so long it takes two passes to get the energy out...

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