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Unsweetened whole-wheat sourdough bread Calories
Fiber-rich whole-wheat sourdough bread with no added sugar.
CALORIES · 100 G
GI
POTASSIUM · 100 G
FIBER · 100 G
Quick answer
1 slice (medium) of Unsweetened whole-wheat sourdough bread (40 g) has 99 calories. That works out to 247 calories per 100 g. It contains 16.6 g of carbs, 4.3 g of protein, 1.4 g of fat and 2.8 g of fiber. Its 0.8 mg of Manganese covers 37% of the Daily Value. Its glycemic index is 53 (medium), so it raises blood sugar at a moderate pace.
Unsweetened whole-wheat sourdough bread Nutrition Facts
Selected: 1 slice (medium) · 40 g
99
KCAL / 40G
Carbs
16.6g
· 6% DV
Protein
4.3g
· 9% DV
Fat
1.4g
· 2% DV
Fiber
2.8g
· 10% DV
DV is the share of the daily value covered, on a 2,000 kcal reference diet.
Calories come from: Carbs 69% · Protein 18% · Fat 13%
Unsweetened whole-wheat sourdough bread nutrition facts table · 1 slice (medium) (40 g)
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 99 kcal | |
| Total fat | 1.4 g | 2% |
| Saturated fat | 0.23 g | 1% |
| Trans fat | 0 g | |
| Sodium | 172 mg | 7% |
| Total carbohydrate | 16.6 g | 6% |
| Fiber | 2.8 g | 10% |
| Protein | 4.3 g | 9% |
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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How Many Calories in 1 Slice of Unsweetened whole-wheat sourdough bread?
| Serving | Amount | Calories |
|---|---|---|
| 1 slice (medium) | 40 g | 99 kcal |
| 1 slice (thin) | 25 g | 62 kcal |
| 1 slice (thick) | 55 g | 136 kcal |
| 1 piece (small) | 60 g | 148 kcal |
| 2 slice (double) | 80 g | 198 kcal |
| 1 serving (medium) | 80 g | 198 kcal |
| 100 g | 100 g | 247 kcal |
| 1 piece (medium) | 100 g | 247 kcal |
| 1 serving (large) | 120 g | 296 kcal |
Calculated from 247 calories per 100 g.
Frequently Asked Questions About Unsweetened whole-wheat sourdough bread
Is unsweetened whole-wheat sourdough bread healthier than regular whole-wheat bread?
It can offer a different flavor and texture, but it is not automatically healthier than regular whole-wheat bread. Both can provide whole-grain fiber; sourdough’s longer fermentation changes the dough, while the ingredients and portion size still matter.
Can people with diabetes eat unsweetened whole-wheat sourdough bread?
Yes, many people with diabetes can include a measured portion, but “unsweetened” does not mean carbohydrate-free: wheat flour still affects blood glucose. Pairing a slice with protein-rich foods such as eggs or unsweetened yogurt can make a more balanced meal.
Does unsweetened whole-wheat sourdough bread contain less gluten?
No, sourdough fermentation does not remove gluten well enough to make this bread safe for people with celiac disease. Unsweetened whole-wheat sourdough bread is made with wheat, so the sourdough process does not make it gluten-free.
Why is unsweetened whole-wheat sourdough bread so dense?
Unsweetened whole-wheat sourdough bread can be denser because whole-wheat bran weighs down the dough and can interfere with gluten’s ability to trap gas. A weak starter, short fermentation, or insufficient dough development can make the loaf especially heavy.
Why does unsweetened whole-wheat sourdough bread taste sour?
Its tang comes from acids produced by bacteria in the sourdough culture during fermentation. Longer or warmer fermentation can make the flavor more pronounced, while a shorter fermentation usually gives a milder loaf.
How do you know whether unsweetened whole-wheat sourdough bread has added sugar?
Look at the ingredient list: sugar, honey, syrup, or molasses indicates a sweetener was added. Flour naturally contains carbohydrates, so a carbohydrate entry on the nutrition panel does not by itself mean the bread contains added sugar.
Can you make unsweetened whole-wheat sourdough bread without commercial yeast?
Yes, an active sourdough starter can raise unsweetened whole-wheat sourdough bread without commercial baker’s yeast. The starter contains wild yeasts and bacteria, and the dough generally needs more time to rise than dough made with packaged yeast.
How should you store unsweetened whole-wheat sourdough bread?
Keep unsweetened whole-wheat sourdough bread at room temperature in a bread box or paper bag, with the cut side covered. Avoid refrigerating it, which can make bread stale faster; discard the whole loaf if you see mold.
Can you freeze unsweetened whole-wheat sourdough bread?
Yes, slice unsweetened whole-wheat sourdough bread before freezing so you can take out only what you need. Seal the slices in a freezer bag; toast them straight from frozen or let them thaw at room temperature.
Is unsweetened whole-wheat sourdough bread good for sandwiches?
Yes, its hearty crumb holds up well to moist sandwich fillings, and its tang pairs particularly well with eggs, cheese, roasted vegetables, or hummus. Let the loaf cool fully before slicing so the crumb does not turn gummy.
Unsweetened whole-wheat sourdough bread Vitamins & Minerals
Vitamins
B3
1.86mg · 12% DV
B1
0.11mg · 9% DV
B6
0.13mg · 8% DV
Biotin
2.08µg · 7% DV
Minerals
Manganese
0.84mg · 37% DV
Selenium
11µg · 20% DV
Phosphorus
88mg · 13% DV
Copper
0.1mg · 11% DV
Sodium
172mg · 7% DV
Potassium ⭐
100mg · 3% DV
Unsweetened whole-wheat sourdough bread Glycemic Index
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
How to Burn Off Unsweetened whole-wheat sourdough bread
To burn the 99 calories in 1 slice (medium) (40 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.
What is Unsweetened whole-wheat sourdough bread?
Unsweetened whole-wheat sourdough bread is made with whole-wheat flour, water and a sourdough starter, which ferments and raises the dough. “Unsweetened” means no sugar is added to the recipe; it does not mean the bread has no naturally occurring carbohydrates. It usually has a hearty crumb, a pronounced grain flavour and a gentle tang, with a crust that toasts well.
It works for breakfast toast, sandwiches or alongside soup, and can be topped with savoury or sweet ingredients to suit the meal. Its whole-grain base makes it a fibre-rich, filling choice; it provides 7.1 g of fibre per 100 g. For a lighter meal, pair a slice with vegetables and a modest amount of cheese, or use it as an open sandwich rather than layering on several slices.
How Nutritious Is Unsweetened whole-wheat sourdough bread?
Nutrient density
High
How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.
Satiety score
High
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.
Is Unsweetened whole-wheat sourdough bread Processed?
NOVA 2
Minimally 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.
Does Unsweetened whole-wheat sourdough bread Contain Allergens?
Contains these allergens:
Which Diets Is Unsweetened whole-wheat sourdough bread Good For?
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
Unsweetened whole-wheat sourdough bread Fat Profile
SATURATED
0.23g
MONOUNSATURATED
0.19g
POLYUNSATURATED
0.56g
Omega 6:3 ratio 17.7:1
Above the ideal 4:1 (17.7:1).
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Nutrition data compiled from USDA FoodData Central and scientific sources.