Fiber One Bar: Calories, Nutrition Facts, and Health Benefits (2026)
A Fiber One bar has 140 calories, 9 g fiber and 0 mg vitamin C. Full fiber one bar nutrition facts per serving and per 100 g, by goal, with blood-sugar and comparison data.
A Fiber One Bar contains 140 calories, 9 g of fiber, and 10 g of sugar per 40 g serving. It provides a source of added fiber, making it a notable option for those seeking to increase their fiber intake.
This page provides a comprehensive overview of the nutrition profile of Fiber One Bars, including their calorie content and health benefits. It also discusses how these bars fit into various dietary goals and compares them to other sweet treats.
Fiber One Bar Nutrition Facts (Per Serving and Per 100 g)
The following nutrition facts table outlines the key nutritional components of a Fiber One Bar, highlighting its calorie count, macronutrients, and fiber content.
Values are for 1 bar (40 g).
| Nutrient | Per Serving | Per 100 g | % Daily Value (per serving) |
|---|---|---|---|
| Calories | 140 | 350 | 7% |
| Protein | 2.0 g | 5.0 g | 4% |
| Carbohydrates | 29.0 g | 72.5 g | 11% |
| Fiber | 9.0 g | 22.5 g | 32% |
| Sugar | 10.0 g | 25.0 g | - |
| Fat | 4.0 g | 10.0 g | 5% |
| Vitamin C | 0.0 mg | 0.0 mg | 0% |
| Potassium | 60 mg | 150 mg | 1% |
| Saturated Fat | 2.0 g | 5.0 g | 10% |
| Sodium | 90 mg | 225 mg | 4% |
About 73% of fiber one bar calories come from carbohydrates, 5% from protein and 23% from fat.
Fiber One Bar by Health Goal
In this section, we evaluate how Fiber One Bars rate according to common dietary goals, helping you understand their suitability for your nutrition plan.
| Goal | Rating | Why |
|---|---|---|
| Weight loss | Fair | 140 calories per serving, with 9 g fiber for fullness |
| Blood sugar / diabetes | Moderate | Glycemic load of about 9 per serving |
| Immunity | Fair | Not a significant source of immune-supporting nutrients |
| Digestion | Excellent | 9 g fiber per serving |
| Heart health | Fair | A processed, low-nutrient food; best eaten in moderation |
| Muscle gain | Fair | Low in protein (2 g per serving) |
Fiber One Bar and Blood Sugar
Glycemic index: 45. Glycemic load: 9 per serving.
Fiber One Bar has a glycemic index of about 45 and a glycemic load of around 9 per serving. Eating it with protein, fat or fiber slows the rise.
How Fiber One Bar Compares to Other Sweets and Treats
The comparison table below illustrates how Fiber One Bars stack up against other sweets and treats in terms of calories, sugar, and fiber content.
| Sweet (per 100 g) | Calories | Sugar (g) | Fat (g) | Protein (g) |
|---|---|---|---|---|
| Fiber One Bar | 350 | 25.0 | 10.0 | 5.0 |
| Quaker Chewy Granola Bar | 417 | 29.2 | 12.5 | 4.2 |
| Nutri-Grain Bar | 351 | 29.7 | 9.5 | 5.4 |
| Quest Bar | 333 | 1.7 | 13.3 | 35.0 |
Fiber One Bar Myths, Checked
Fiber One bars are sugar-free , False. They are high in added fiber but still contain about 10 g of sugar.
The fiber means you can eat several , Misleading. Large amounts of the added fiber can cause bloating and gas.
How to Track Fiber One Bar
Treats like fiber one bar are easy to under-log, because the serving on the label is often smaller than what people actually eat, so portion size is everything. Nutrola identifies food from a photo, barcode or voice entry and returns calories and macros, so you can log fiber one bar accurately instead of estimating. Nutrola is available from EUR 2.50 per month and shows no ads on any tier.
For related references, see calories in every candy and chocolate bar by brand, calories in popular desserts and bakery items, and every sugar and sweetener decoded.
Sources
Nutrition values are from the USDA FoodData Central database, shown per serving and per 100 g, rounded. Percent Daily Values use US reference intakes for a 2,000 calorie diet. Glycemic index and load are from published international tables and vary by variety, ripeness and cooking method. This is educational and not medical advice.
Frequently Asked Questions (FAQ)
How many calories are in a Fiber One bar?
A Fiber One Bar contains 140 calories per 40 g serving. This makes it a relatively low-calorie snack option compared to many other sweet treats.
Is fiber one bar good for weight loss?
Fiber One Bars can be beneficial for weight loss due to their high fiber content, which may help promote feelings of fullness. Each bar contains 9 g of fiber, contributing to a balanced diet.
Can people with diabetes eat fiber one bar?
People with diabetes can eat Fiber One Bars, as they have a glycemic index of about 45, indicating a moderate impact on blood sugar levels. However, it's essential to consider the total carbohydrate content.
How much fiber is in fiber one bar?
Each Fiber One Bar contains 9 g of fiber, which can help meet daily fiber intake recommendations. This added fiber can support digestive health.
Is fiber one bar high in sugar?
Fiber One Bars contain 10 g of sugar per serving. While this is higher than some other snack options, it is still moderate compared to traditional candy bars.
Are Fiber One bars good for you?
Fiber One Bars can be a good option for those looking to increase fiber intake while enjoying a sweet snack. However, it's important to consume them as part of a balanced diet.
Key Takeaways
- Each Fiber One Bar has 140 calories per serving.
- The bars contain 9 g of fiber, aiding digestive health.
- They provide 10 g of sugar, which is moderate for a snack.
- A serving includes 2 g of saturated fat and 4 g of total fat.
- The glycemic index is about 45, making it suitable for blood sugar management.
- Fiber One Bars can be a helpful addition to a weight loss plan.
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