Slowly digestible starch product
View Patent ↗This patent pertains to a slowly digestible starch prepared by debranching amylose-containing starches, particularly by pullulanase or isoamylase. Such slowly digestible starches are useful in edible products, including nutritional supplements.
1. A starch composition prepared from amylose-containing starch comprising crystalline linear α-glucans characterized by:
a) at least about 20% slowly digestible starch;
b) less than about 50% rapidly digestible starch;
c) a melting point temperature, T p as measured by DSC, of at least about 70° C.; and
d) an enthalpy, ΔH as measured by DSC, of at least about 25 J/g, wherein at least about 50% is digested within two hours as measured by simulated digestion.
2. The starch composition of claim 1 , wherein at least about 60% is digested within two hours as measured by simulated digestion.
3. The starch composition of claim 1 , whereby the starch composition is prepared from starch selected from the group consisting of maize starch, sago starch, tapioca starch, and potato starch.
4. The starch composition of claim 1 , wherein the melting point temperature is at least about 80° C.
5. The starch composition of claim 1 , wherein the melting point temperature is at least about 90° C.
6. The starch composition of claim 1 , wherein the enthalpy is at least about 30 J/g.
7. The starch composition of claim 1 , characterized by at least about 30% slowly digestible starch.
8. A process of making the starch composition of claim 1 comprising:
a) debranching an amylose-containing starch;
b) allowing the debranched starch to crystallize; and
c) drying the highly crystallized debranched starch.
9. The process of claim 8 , wherein the starch composition is debranched using pullulanase or isoamylase.
10. An edible product comprising the starch composition of claim 1 .
11. The product of claim 10 , wherein the product is a nutritional food.