I have no idea, @KYZ was asking about using it in some recipes from a keto cookbook, and some one replied they used it :
rettakatRetta StephensonLegacyJul '17
I just made sugar free zucchini choc chip cookies using oat fiber as one of the ingredients.
Oat Fiber, Per 1 Tablespoon:
Total Fat 0g
Total Carbs 3 g
Dietary Fiber 3 g
Net carbs, minus fiber: 0g