A study with a total of 36 crossbred castrate male pigs (37.5±0.6 kg) fitted with a simple T-cannula
was carried out. The effect of extrusion cooking of barley, peas and a mixture (4:1) of potato starch and
wheat bran (PSWB) on the coefficients of ileal (CIAD) and total tract apparent digestibility (CTTAD)
according to a 3×2 factorial design was determined. The starch digestion profile of carbohydratecontaining
ingredients was described using an in vitro setup based on the Englyst procedure for
nutritional classification of starch. Extrusion cooking increased the proportion of rapidly digestible
starch (RDS), and reduced the proportion of slowly digestible starch (SDS) and resistant starch (RS),
and an in vitro digestion profile up to 8 h demonstrated major differences in the rate and extent of
digestion of the raw carbohydrate sources, while the digestion profiles of the extruded products were
almost identical.