Top 10 · Updated October 2026
Highest-Protein Red Onions
Red onions: typically 1.1 g of protein per 100 g (median of 27 products). The red onions with the most protein per 100 g. Useful if you are trying to increase your protein intake. We checked 17 red onions with complete data.
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Cibuľa červená lúpaná plátky
no brand · 1000 g -
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Cipolla rossa di Tropea Calabria IGP
Sapori Dintorni · 500gAlso: Palm oil free · Vegan · Vegetarian
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How we built this list
We ranked all published red onions on Foodmetria that have a photo and the required nutrition data, using values per 100 g from the product label. Ties are broken by Nutri-Score and by how often shoppers scan the product. Rankings update automatically as label data changes. Read our methodology.