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Fiber One Protein
Fiber One Protein by Fiber 1 provides 394 kcal per 100 g, with 6.1 g of sugars and 18.2 g of protein. That is 66% less sugar than the average product in this category. Its Nutri-Score is D and it is classified as NOVA 4 (ultra-processed food). It is listed in the Cereals and their products category and comes in a 33g pack. Contains: gluten, milk, peanuts, soybeans.
Nutrient levels per 100 g
Levels use UK front-of-pack reference thresholds.
Nutrition facts
Serving size: 1 bar (33 g)
| Nutrient | Per 100 g | Per serving | % DV* | Category avg |
|---|---|---|---|---|
| Calories | 394 kcal | 130 kcal | 389 | |
| Total fat | 18.2 g | 6 g | 8% | 7.8 +132% |
| Saturated fat | 10.6 g | 3.5 g | 18% | 1.6 +559% |
| Carbohydrates | 48.5 g | 16 g | 6% | 69.5 −30% |
| Total sugars | 6.1 g | 2 g | 17.7 −66% | |
| Added sugars | 3 g | 1 g | 2% | 9.3 −67% |
| Dietary fiber | 24.2 g | 8 g | 29% | 7.7 +213% |
| Protein | 18.2 g | 6 g | 12% | 10.3 +77% |
| Salt | 1 g | 0.3 g | 0.8 +25% |
*% Daily Value for a serving, based on a 2,000-calorie diet (FDA reference values). Category average across 8322 Cereals and their products products on Foodmetria.
Serving size from the US product label in USDA FoodData Central, label data from August 2025. Other values: Open Food Facts.
Compared with other cereals and their products
Bar shows the share of products in this category that contain less of the nutrient.
Ingredients
Roasted peanuts, chicory root extract, soy protein isolate, sugar, corn syrup, vegetable oil (palm kernel, palm, canola), water, whey protein concentrate, maltodextrin, rice flour, cocoa, glycerin, rice starch, nonfat milk, fructose, salt, corn starch, soy lecithin, mono and diglycerides, disodium phosphate, barley malt extract, natural flavor, carrageenan, caramel color, mixed tocopherols added to retain freshness.
- Allergens
- GlutenMilkPeanutsSoybeans
Additives 7
Overexposure risk is based on EFSA evaluations as recorded by Open Food Facts.
Product details
- Quantity
- 33g
- Serving size
- 1 bar (33 g)
- Sold in
- United States
- Barcode
- 0016000508859
Prices reported by shoppers
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Frequently asked questions
How many calories are in Fiber One Protein?
Fiber One Protein contains 394 kcal per 100 g and about 130 kcal per serving (1 bar (33 g)).
How much sugar is in Fiber One Protein?
Fiber One Protein has 6.1 g of sugars per 100 g, which is considered moderate by UK front-of-pack guidelines.
Is Fiber One Protein healthy?
It has a Nutri-Score of D (A is best, E is worst); it is in NOVA group 4 — ultra-processed food. Scores describe nutritional quality and processing, not suitability for your individual diet.
Is Fiber One Protein vegan?
Based on its ingredient list, it is not vegan.
What allergens does Fiber One Protein contain?
According to the label data it contains: Gluten, Milk, Peanuts, Soybeans. Recipes change — always check the package label.
Source: Open Food Facts (ODbL). Last updated June 2, 2026. Spotted a mistake? Edit this product on Open Food Facts. Not medical advice — always check the package label.
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