I've been looking around for the best report about which gut bacteria produce which vitamins, but it looks like there are so many that produce each vitamin.
file:///C:/Users/Brad/Downloads/MANUSCRIPT_PATEL_3%20(2).pdf
I can't get this link to work, so I'll find another.
This one is ok, but it looks like, ' more research is needed.'
http://www.wiley-vch.de/books/biotech/pdf/v10_shim.pdf
The reason I'm putting this information in a SIBO thread is because, with SIBO, there can be vitamin deficiencies, as well as excesses. I've come across some examples of folks with elevated B6, and since many of them weren't taking much or any of it, I suspect they may be suffering from some bacterial overgrowth producing B6.
I haven't found a case of it, but it seems plausible. In my case, folate was extremely elevated, and I had been avoiding it, ( food and supps.), for months.
Since many types of gut bacteria, including lactic acid bacteria, produce B vitamins, I suspect some people may be suffering neuropathy from excess B6 production in the gut.
http://www.ncbi.nlm.nih.gov/pubmed/22940212
@AndyPandy , have you found a way to treat your elevated B6 neuropathy? I hope so. I wrote this with you in mind.