A typical 1 cup shredded raw serving of red cabbage contains 1 grams of protein (1.43 g per 100 g), which makes it only a minor source of protein. That covers roughly 2% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Around 18% of the calories in red cabbage 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 105 vegetables in the database, red cabbage ranks 80th by protein per serving, and 729th out of all 796 foods on the site. Set against arugula, another vegetable entry in the database, a serving carries about 0.5 g more protein (arugula has 0.5 g per 1 cup raw).
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 70 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #169977 - "Cabbage, red, raw" (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
Red cabbage protein FAQ
How much protein is in red cabbage per 100 g?
Red cabbage has 1.43 g of protein per 100 g. A typical 1 cup shredded raw serving (70 g) provides 1 g.
Is red cabbage a complete protein?
No. Red cabbage is an incomplete protein on its own; pairing it with other protein sources across the day covers the full range of essential amino acids.
How much of the Daily Value does a serving of red cabbage cover?
A 1 cup shredded raw serving of red cabbage contains 1 g of protein, about 2% of the 50 g reference Daily Value.
Is red cabbage a good source of protein?
Red cabbage is only a minor source of protein, and about 18% of its calories come from protein, which makes it more of an energy food than a protein food. Set against arugula, another vegetable entry in the database, a serving carries about 0.5 g more protein (arugula has 0.5 g per 1 cup raw).