Zwieback has a high glycemic index of 70 (typical range 65 to 76). A serving of 1 oz (28 g) has a glycemic load of 14, which is medium. Per 100 g it provides 426 calories, 10.1 g protein, 74.2 g carbohydrate (2.5 g fiber, 12.5 g sugars) and 9.7 g fat.
Serving used for glycemic load: 1 oz (28 g).
| Nutrient | Per 100 g | Per serving |
|---|---|---|
| Calories | 426 kcal | 119 kcal |
| Protein | 10.1 g | 2.8 g |
| Carbohydrate | 74.2 g | 20.8 g |
| Fiber | 2.5 g | 0.7 g |
| Sugars | 12.5 g | 3.5 g |
| Fat | 9.7 g | 2.7 g |
| Saturated fat | 2.5 g | 0.7 g |
| Sodium | 227 mg | 64 mg |
| Potassium | 305 mg | 85 mg |
Other breads with a lower glycemic load per serving:
| Food | GI | GL / serving |
|---|---|---|
| Crouton | 72 | 14 |
| Cheese Bread | 60 | 12 |
| Pita Bread | 68 | 10 |
| White Bread | 75 | 10 |
| Potato Bread | 72 | 9 |
Zwieback has a glycemic index of 70, which is high (low is 55 or under, high is 70 or over). The glycemic load of a 1 oz (28 g) serving is 14, which is medium.
Glycemic load is the better guide, because it accounts for portion size. A serving of zwieback has a glycemic load of 14 (medium). Eating it with protein, fat or fiber slows absorption further. This is general information, not medical advice; people with diabetes should follow their clinician's guidance.
Zwieback has 426 calories per 100 g, and about 119 calories in a 1 oz (28 g) serving.
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Open the free web appGlycemic index: NutriOptio's reference table, compiled from the University of Sydney GI database and the international tables of glycemic index and glycemic load; the range reflects variation across studies, ripeness and preparation. Nutrition: USDA FoodData Central, SR Legacy, “Zwieback” (FDC 171372). Glycemic load = GI × available carbohydrate (carbohydrate minus fiber) per serving ÷ 100. Nutri-Score computed with the 2017 general-food algorithm.
General information, not medical advice.
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