Protein content
A 1 cup serving of tomato juice contains 2.1 g of protein - only a minor source of protein, about 4% of the 50 g Daily Value.
Share of this food's calories that come from protein - it is moderately protein-dense.
| Serving | 1 cup (243 g) |
|---|---|
| Protein per serving | 2.1 g |
| Protein per 100 g | 0.85 g |
| Calories per serving | 41 kcal |
| Protein density | 20% of calories |
| Share of 50 g Daily Value | 4% |
| Protein quality | Incomplete protein |
| Category | Vegetables |
| Food type | Prepared / processed |
| USDA record | FoodData Central #170545 |
A typical 1 cup serving of tomato juice contains 2.1 grams of protein (0.85 g per 100 g), which makes it only a minor source of protein. That covers roughly 4% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Around 20% of the calories in tomato juice come from protein, so it is moderately protein-dense. 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 105 vegetables in the database, tomato juice ranks 47th by protein per serving, and 648th out of all 796 foods on the site. Set against rutabaga, another vegetable entry in the database, a serving carries about 0.5 g more protein (rutabaga has 1.6 g per 1 cup cubes 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 volume at 243 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #170545 - "Tomato juice, canned, without salt added" (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
Tomato juice has 0.85 g of protein per 100 g. A typical 1 cup serving (243 g) provides 2.1 g.
No. Tomato juice 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 cup serving of tomato juice contains 2.1 g of protein, about 4% of the 50 g reference Daily Value.
Tomato juice is only a minor source of protein, and about 20% of its calories come from protein, which makes it moderately protein-dense. Set against rutabaga, another vegetable entry in the database, a serving carries about 0.5 g more protein (rutabaga has 1.6 g per 1 cup cubes cooked).
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