In the early days, starch was considered to be completely digested and absorbed in the
small intestine. Later, it was found that a fraction of starch (resistant starch or RS) survived
the enzyme digestion in the digestive track (Englyst and Cummings 1985, Björck et al 1986,
Faisant et al 2007). RS is not absorbed in the small intestine, and is passed onto the colon,
where it is fermented by the gut microflora.