Early version. Nutrient values from USDA FoodData Central; dietitian review in progress. Not medical advice.

How healthy is sourdough bread?

Is sourdough bread healthy? Yes, in moderate portions. Sourdough bread scores 21/100 on the HowHealthyIs Score: 100 g provides 272 kcal, 3.9 mg iron and 11 g protein. Sourdough is fermented, which lowers its glycemic response a little, but white sourdough is still refined flour. Source: USDA FoodData Central.

  • Source of protein
  • Source of iron
  • High in salt
Score explained

The score compares nutrient density per 100 kcal across every food we cover (NRF9.3 method). Sourdough bread ranks higher than 21% of them.

Counts in favor (% daily value per 100 kcal)

  • Iron8%
  • Protein8%
  • Fiber3%
  • Magnesium3%
  • Calcium1%
  • Potassium1%
  • Vitamin E1%
  • Vitamin A0%
  • Vitamin C0%

Counts against

  • Saturated fat1%
  • Added sugars0%
  • Sodium10%

Raw NRF9.3: 24 minus 11 = 14. The score is not a verdict on whether to eat a food; portion, the whole meal and your own health matter more. Full methodology

How many calories are in sourdough bread?

Calories87kcal
Protein3.4g
Carbohydrates17g
Fat0.8g
Fiber0.7g
Sugars1.5g
Nutrition facts for sourdough bread. Per 100 g and for the selected portion (32 g). %DV uses FDA Daily Values.
NutrientPer 100 gPer portion%DV
Energy and macronutrients
Calories272 kcal87 kcal
Protein11 g3.4 g7%
Carbohydrates52 g17 g6%
Fiber2.2 g0.7 g3%
Sugars4.6 g1.5 g
Added sugars0.5 g0.2 g0%
Fat2.4 g0.8 g1%
Saturated fat0.5 g0.2 g1%
Vitamins
Vitamin A0 µg0 µg0%
Vitamin C0 mg0 mg0%
Vitamin E0.2 mg<0.1 mg0%
Minerals
Calcium52 mg17 mg1%
Iron3.9 mg1.3 mg7%
Potassium117 mg37 mg1%
Magnesium32 mg10 mg2%
Sodium602 mg193 mg8%

Source: USDA FoodData Central, "Bread, french or vienna (includes sourdough)" (FDC 172675). Values rounded.

Why is sourdough bread good for you?

A typical portion does not supply 10% or more of the daily value for any of the nine nutrients we score.

Good ways to use it

  • Toast and sandwiches
  • Choosing whole-grain sourdough for more fiber

What should you watch out for?

  • Salt content is similar to other breads.

Which grains score higher?

Other grains with more nutrition per calorie. Variety matters more than picking one winner.

How does sourdough bread compare?

Common questions about sourdough bread

How many calories are in sourdough bread?
100 g of sourdough bread has 272 kcal. A typical portion, 1 slice (32 g), has about 87 kcal.
How much protein is in sourdough bread?
Sourdough bread has 11 g of protein per 100 g, or about 3.4 g in 1 slice.
Is sourdough bread good for weight loss?
Sourdough bread is fairly calorie-dense (272 kcal per 100 g), so portion size matters more than the food itself. 1 slice is about 87 kcal.

Sources

  1. U.S. Department of Agriculture. FoodData Central, SR Legacy: "Bread, french or vienna (includes sourdough)", FDC ID 172675. fdc.nal.usda.gov
  2. U.S. Food and Drug Administration. Daily Value on the Nutrition and Supplement Facts Labels (21 CFR 101.9).
  3. Fulgoni VL, Keast DR, Drewnowski A. Development and validation of the Nutrient-Rich Foods Index. J Nutr. 2009;139(8):1549-1554.
  4. Monteiro CA, et al. Ultra-processed foods: what they are and how to identify them. Public Health Nutr. 2019;22(5):936-941.

Review and updates

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More: Grains ranked, foods high in iron.