Protein content
A 1 oz slice serving of sourdough bread contains 3.1 g of protein - a moderate source of protein, about 6% of the 50 g Daily Value.
Share of this food's calories that come from protein - it is more of an energy food than a protein food.
| Serving | 1 oz slice (28.4 g) |
|---|---|
| Protein per serving | 3.1 g |
| Protein per 100 g | 10.8 g |
| Calories per serving | 77 kcal |
| Protein density | 16% of calories |
| Share of 50 g Daily Value | 6% |
| Protein quality | Incomplete protein |
| Category | Grains |
| Food type | Prepared / processed |
| USDA record | FoodData Central #172675 |
A typical 1 oz slice serving of sourdough bread contains 3.1 grams of protein (10.8 g per 100 g), which makes it a moderate source of protein. That covers roughly 6% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Around 16% of the calories in sourdough bread come from protein, so it is more of an energy food than a protein food. It contributes to a day's protein total, but the bulk of what it delivers is energy rather than amino acids - treat it as a contributor alongside a denser source, not as the protein in a meal.
Among the 111 grains in the database, sourdough bread ranks 81st by protein per serving, and 590th out of all 796 foods on the site. Set against instant rice, another grain entry in the database, a serving carries about 0.5 g less protein (instant rice has 3.6 g per 1 cup cooked).
It is an incomplete protein on its own; pairing it with other plant foods across the day covers the full range of essential amino acids. The serving above is measured by weight at 28.4 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
USDA groups sourdough with French and Vienna bread.
Source: USDA FoodData Central #172675 - "Bread, french or vienna (includes sourdough)" (SR Legacy, published 4/1/2019). Values are the published reference figures for that record, not lab measurements for a specific brand or batch.
Quick answers
Sourdough bread has 10.8 g of protein per 100 g. A typical 1 oz slice serving (28.4 g) provides 3.1 g.
No. Sourdough bread is an incomplete protein on its own; pairing it with other protein sources across the day covers the full range of essential amino acids.
A 1 oz slice serving of sourdough bread contains 3.1 g of protein, about 6% of the 50 g reference Daily Value.
Sourdough bread is a moderate source of protein, and about 16% of its calories come from protein, which makes it more of an energy food than a protein food. Set against instant rice, another grain entry in the database, a serving carries about 0.5 g less protein (instant rice has 3.6 g per 1 cup cooked).
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