Many of the substances they list for having dietary fiber that increases butyrate production also has RS - While things like Oat Bran have lots of fiber, they have been shown to not produce large amounts of butyrate:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1374147/

So I think RS (or some other high butyrate producing fiber) could really benefit the sufferers of AS and inflammatory bowel related disorders.

This article is a goldmine:

http://onlinelibrary.wiley.com/doi/10.1111/j.1574-6968.2002.tb11467.x/full

They list two possible high butyrate produers:

Roseburia intestinalis
and
Faecalibacterium prausnitzii

Interestingly enough low levels of F. Prausnitzii are associated with Crohns

http://www.pnas.org/content/105/43/16731.short

R. Intestinalis can ferment glucose, arabinose, cellobiose,
maltose, fructose, raffinose, sucrose, xylose,
xylan and starch:

http://ijs.sgmjournals.org/content/52/5/1615.full.pdf+html

Looks like long-chain inulin is also butyrogenic:

http://www.pnas.org/content/108/suppl.1/4672.full

Last edited by kawasakiguy37; 03/15/12 11:07 PM.