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Naturally fermented white bread
In season: Spring · Summer · Autumn · Winter
CALORIES · 100 G
GI
POTASSIUM · 100 G
FIBER · 100 G
1 slice (medium) of White Flour Sourdough Bread (35 g) has 89 calories. That works out to 255 calories per 100 g. It contains 18.2 g of carbs, 3 g of protein, 0.5 g of fat and 0.8 g of fiber. Its 9.5 µg of Selenium covers 17% of the Daily Value. Its glycemic index is 54 (medium), so it raises blood sugar at a moderate pace.
Selected: 1 slice (medium) · 35 g
89
KCAL / 35G
Carbs
18.2g
· 7% DV
Protein
3g
· 6% DV
Fat
0.5g
· 1% DV
Fiber
0.8g
· 3% DV
DV is the share of the daily value covered, on a 2,000 kcal reference diet.
Calories come from: Carbs 82% · Protein 13% · Fat 5%
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 89 kcal | |
| Total fat | 0.5 g | 1% |
| Saturated fat | 0.09 g | 0% |
| Trans fat | 0 g | |
| Sodium | 165 mg | 7% |
| Total carbohydrate | 18.2 g | 7% |
| Fiber | 0.8 g | 3% |
| Protein | 3 g | 6% |
Calories: Calories measure energy. Average daily need is 2,000 kcal. Excess calories are stored as fat, too few cause weight loss.
Carbs: Your body's primary energy source. The brain runs exclusively on carbs. Daily need: 275g.
Protein: Essential for muscle repair and cell growth. Daily need: 50g. Keeps you full and boosts metabolism.
Fat: Needed for hormone production and vitamin absorption. Daily need: 78g. Limit saturated fats, choose unsaturated.
Fiber: Critical for digestive health and satiety. Daily need: 28g. Stabilizes blood sugar, lowers cholesterol.
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| Serving | Amount | Calories |
|---|---|---|
| 1 slice (medium) | 35 g | 89 kcal |
| 1 slice (thin) | 25 g | 64 kcal |
| 1 piece (small) | 45 g | 115 kcal |
| 1 slice (thick) | 50 g | 128 kcal |
| 2 slice (medium) | 70 g | 179 kcal |
| 1 piece (large) | 80 g | 204 kcal |
| 100 g | 100 g | 255 kcal |
| 1 serving (medium) | 100 g | 255 kcal |
| 1 serving (large) | 150 g | 383 kcal |
Calculated from 255 calories per 100 g.
It can be easier for some people because fermentation may break down some fermentable carbohydrates, but it is not reliably easier for everyone. It still contains gluten, so it is not suitable for people with coeliac disease.
White flour sourdough bread is leavened with a fermented starter containing wild yeasts and bacteria, rather than relying only on baker’s yeast. The longer fermentation gives it a tangier flavour and a different crumb, but it is still a processed bread.
The sour taste comes from acids produced by bacteria in the starter as the dough ferments. A longer fermentation or a starter kept under different conditions can make the flavour sharper, so sourness varies from loaf to loaf.
Keep white flour sourdough bread at room temperature in a bread box or paper bag, with the cut side facing down. Avoid a warm, damp spot, where mould can develop faster; refrigeration can make the crumb go stale sooner.
Yes. Slice the loaf, seal the slices in a freezer-safe bag, and freeze them. You can toast slices straight from frozen, which helps avoid thawing more bread than you need.
A gummy crumb often means the loaf was underbaked or sliced before it had cooled. Let the bread bake through, then cool it fully on a rack before cutting so steam can escape and the crumb can set.
Toasting can change the bread’s texture and may modestly affect the glucose response, but it does not remove its carbohydrates or guarantee a lower blood-sugar rise. Portion size and what you eat with it also matter.
Yes. Its sturdy crumb absorbs egg-and-milk mixture well without falling apart, especially when the slices are a day old. Soak briefly, then cook over moderate heat until the center is set.
An inactive starter, insufficient fermentation, or overproofing can leave white flour sourdough bread flat and dense. Use a lively starter and judge the dough by its rise and feel, rather than following the clock alone.
Yes, if it suits your needs and fits the way you eat. It is still made from refined white flour, so pairing it with foods such as eggs, beans, vegetables, or nut butter can make a meal more filling.
Vitamins
B1
0.12mg · 10% DV
Folate
32.2µg · 8% DV
B3
1.19mg · 7% DV
B2
0.07mg · 5% DV
Minerals
Selenium
9.45µg · 17% DV
Manganese
0.17mg · 7% DV
Sodium
165mg · 7% DV
Iron
1.09mg · 6% DV
Potassium ⭐
44mg · 1% DV
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
To burn the 89 calories in 1 slice (medium) (35 g):
🚶
Walking (5 km/h)
🏃
Running (8 km/h)
🚴
Cycling
🏊
Swimming
Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.
White Flour Sourdough Bread is made with white wheat flour, water and a sourdough starter, then left to ferment before baking. Sourdough baking has a long history in many regions, and the loaf is now enjoyed around the world. Fermentation gives it a mild tang, while the crust is often crisp and the crumb pleasantly chewy and airy.
It works well toasted at breakfast, as the base for sandwiches, or alongside soup and salads. It is mainly a source of carbohydrates, with 8.6 g of protein per 100 g. For a more sustaining meal, pair a slice with eggs, beans or fresh vegetables.
Low
How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.
Medium
An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.
Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.
NOVA 3
Processed
1. Unprocessed
2. Minimally Processed
3. Processed
4. Ultra-Processed
NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.
Contains these allergens:
Vegan
✓ Suitable
Vegetarian
✓ Suitable
Gluten-Free
— Not suitable
Dairy-Free
— Not suitable
Mediterranean
✓ Suitable
Paleo
— Not suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
— Not suitable
Low FODMAP
— Not suitable
SATURATED
0.09g
MONOUNSATURATED
0.06g
POLYUNSATURATED
0.15g
Omega 6:3 ratio 14:1
Above the ideal 4:1 (14:1).
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Nutrition data compiled from USDA FoodData Central and scientific sources.