Friday, September 12, 2014

Starch Digestion in the Horse - Full Article

By Kentucky Equine Research Staff · July 30, 2014

Several factors determine how quickly and thoroughly starch is digested by horses. These include properties of the starch granule; the effect of processing; associated food structures such as plant cell walls; transit time through the small intestine; and the availability and concentration of enzymes. These factors will affect the horse’s glycemic response to feeding and the subsequent production of insulin. Resistant starch, together with undigested starch, can pass into the large intestine, where it may be fermented to produce short-chain fatty acids.

Resistant starch may escape digestion in the small intestine of the horse because of physical entrapment within a food, such as in partly milled grains and seeds (RS1 starch), or because starch granules have a B or C crystalline structure, which is highly resistant to digestion (RS2 starch). RS1 and RS2 are quantitatively the most important forms of resistant starch found in horse feeds...

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