Protein content
A 1 medium serving of sweet potato contains 2.3 g of protein - only a minor source of protein, about 5% 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 medium (114 g) |
|---|---|
| Protein per serving | 2.3 g |
| Protein per 100 g | 2.01 g |
| Calories per serving | 103 kcal |
| Protein density | 9% of calories |
| Share of 50 g Daily Value | 5% |
| Protein quality | Incomplete protein |
| Category | Vegetables |
| Food type | Whole food |
| USDA record | FoodData Central #168483 |
A typical 1 medium serving of sweet potato contains 2.3 grams of protein (2.01 g per 100 g), which makes it only a minor source of protein. That covers roughly 5% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Only about 9% of the calories in sweet potato come from protein, so it is more of an energy food than a protein food. It is worth eating for other reasons; the protein it adds to a day is incidental.
Among the 105 vegetables in the database, sweet potato ranks 41st by protein per serving, and 633rd out of all 796 foods on the site. Set against oyster mushrooms, another vegetable entry in the database, a serving carries about 0.5 g less protein (oyster mushrooms has 2.8 g per 1 cup sliced).
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 counted by piece at 114 g. Because pieces vary, the per-100 g figure is the one to use when comparing this against a food measured a different way.
Source: USDA FoodData Central #168483 - "Sweet potato, cooked, baked in skin, flesh, without salt" (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
Sweet potato has 2.01 g of protein per 100 g. A typical 1 medium serving (114 g) provides 2.3 g.
No. Sweet potato 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 medium serving of sweet potato contains 2.3 g of protein, about 5% of the 50 g reference Daily Value.
Sweet potato is only a minor source of protein, and about 9% of its calories come from protein, which makes it more of an energy food than a protein food. Set against oyster mushrooms, another vegetable entry in the database, a serving carries about 0.5 g less protein (oyster mushrooms has 2.8 g per 1 cup sliced).
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