Oat bran composition comprising beta glucan and method of making
Providing an oat bran composition that contains water, optionally an acid, and oat bran delivering at least about 0.75 g of beta glucan per serving to provide a heart-healthy and consumer-acceptable product through application of shear to reduce viscosity.
1. A method for making an oat bran composition, comprising:
combining a starting oat bran concentrate with an acid and water to provide an oat bran slurry comprising about 1 to 5 wt. % oat bran in the oat bran slurry and a pH between 3 and 6, wherein the oat bran slurry comprises a first viscosity (measured at 70° C. and at a shear rate of 100 s −1 ) prior to applying shear; and
applying shear at a shear rate of at least about 60,000 s −1 to the oat bran slurry to produce a reduced viscosity oat bran slurry comprising a second viscosity (measured at 70° C. and at a shear rate of 100 s −1 ), wherein the second viscosity is at least about 40% lower than the first viscosity.
2. The method of claim 1 , further comprising:
cooling the reduced viscosity oat bran slurry to less than about 45° C. by adding ambient temperature water to provide a cooled oat bran slurry;
mixing the cooled oat bran slurry with additional ingredients comprising gellan gum to provide a thickened oat bran slurry; and
reducing a total solids content of the thickened oat bran slurry by adding water.
3. The method of claim 2 wherein the additional ingredients comprise at least one ingredient chosen from the group consisting of inulin, calcium carbonate, vegetable oil, and gum acacia.
4. The method of claim 1 , further comprising adding a calcium salt to the reduced viscosity oat bran slurry to provide the reduced viscosity oat bran slurry with a second pH between 6 and 8 pH.
5. The method of claim 4 , wherein the calcium salt comprises calcium carbonate, tricalcium phosphate, or combinations thereof.
6. The method of claim 2 , comprising thermal processing the thickened oat bran slurry to provide the oat bran composition.
7. The method of claim 6 , wherein the thermal processing comprises:
preheating the thickened oat bran slurry to at least about 77° C. to provide a preheated oat bran slurry;
heating the preheated oat bran slurry to at least about 139° C. for about 3 to 15 seconds to provide a heated oat bran slurry; flash-cooling the heated oat bran slurry to about 79 to 82° C. to provide a flash-cooled oat bran slurry;
homogenizing the flash-cooled oat bran slurry at about 2500 to 3500 psig to provide a homogenized oat bran slurry; and
cooling the homogenized oat bran slurry to less than about 18° C. to provide the oat bran composition; and aseptically storing the oat bran composition.
8. The method of claim 1 , further comprising homogenizing the oat bran slurry at a pressure of between about 2000 and 3500 psig.
9. The method of claim 1 wherein the method is conducted in the absence of hydrolysis of the oat bran concentrate.