What are the Ingredients in Fiber 1 Bars?

November 24, 2025 •

3 min read

With 9 out of 10 Americans not getting enough dietary fiber, many turn to supplements or fortified foods like Fiber 1 bars to boost their intake. But what are the ingredients in Fiber 1 bars that provide this fiber and contribute to the bar's overall composition?

Quick Summary

An analysis of Fiber 1 bars reveals core ingredients like chicory root extract, whole grains (oats, barley), sweeteners, and flavorings, which vary by product type.

Key Points

Primary Fiber Sources: The main fiber comes from chicory root extract (inulin) and soluble corn fiber, contributing significantly to the bars' total fiber content.
Ingredient Variation: The specific ingredients differ across product lines, with protein bars containing soy and whey proteins, and low-calorie options using alternative sweeteners like allulose and stevia.
Sweeteners and Binders: Common ingredients like corn syrup, sugar, and vegetable glycerin are used as binders and sweeteners, affecting the bar's texture and flavor.
Processed Components: The bars are highly processed and contain added sugars, various oils, and emulsifiers, which should be considered in the context of a balanced diet.
Digestive Effects: A sudden increase in fiber intake from these bars, particularly from chicory root extract, can cause gastrointestinal discomfort, such as bloating, in some people.

Core Ingredients Behind the Fiber

At the heart of many Fiber 1 bars are specific ingredients chosen for their fiber content and ability to create a palatable, convenient snack. The most prominent fiber source is chicory root extract, which provides inulin fiber. In some products, this is supplemented or replaced by soluble corn fiber, a highly fermentable dietary fiber that also functions as a sugar substitute. Together, these fiber sources contribute to the bars' high fiber content, which can aid digestive health.

Beyond the fiber, whole grains form a foundational part of many chewy varieties. Ingredients like whole grain oats and whole grain barley flakes add texture and contribute some natural fiber and bulk to the bar. These are often combined with rice flour or puffed durum wheat to create the bar's structure.

Binders, Sweeteners, and Texture Agents

To create a cohesive and pleasant-tasting bar, a variety of binders and sweeteners are used. Corn syrup and sugar are common in the classic chewy bars, while low-calorie options utilize alternatives like allulose, maltitol syrup, and stevia leaf extract. A sweetener's impact on taste and glycemic response varies, affecting the overall nutritional profile. Vegetable glycerin also plays a role, acting as a humectant to help retain moisture and give the bar its soft, chewy texture.

Flavoring and Additives

To achieve their signature flavors, Fiber 1 bars incorporate several other ingredients. For chocolate variations, cocoa processed with alkali and semi-sweet chocolate chips are key. Flavors are further enhanced by natural flavorings, salt, and other compounds. Additives are used for various purposes, including:

Soy lecithin: An emulsifier that helps blend fat and water-based ingredients smoothly.
Baking soda: A leavening agent used in baked varieties like brownies.
Vitamin E (mixed tocopherols): Added as an antioxidant to preserve freshness.
Cellulose gum: A thickener and stabilizer.

Ingredients Comparison: Oats & Chocolate vs. Protein Caramel Nut

Different Fiber 1 bar types have distinct ingredient profiles to achieve their nutritional goals.


Ingredient Category	Oats & Chocolate Bar (Chewy)	Protein Caramel Nut Bar (Chewy)
Primary Fiber	Chicory Root Extract	Chicory Root Extract, Soluble Corn Fiber
Protein Source	Whole Grains (Oats, Barley)	Soy Protein Isolate, Whey Protein Concentrate, Milk Protein Isolate
Sweeteners	Corn Syrup, Sugar, Fructose, Maltodextrin	Allulose, Corn Syrup, Invert Sugar, Stevia Leaf Extract
Fats	Canola Oil, Palm Kernel Oil	Palm Kernel and Palm Oil, Canola Oil
Flavoring	Semisweet Chocolate, Cocoa Powder	Roasted Peanuts, Caramel, Cocoa Powder
Allergens	Contains soy and milk ingredients	Contains peanut, soy, and milk; may contain wheat

Potential Considerations for Consumers

While Fiber 1 bars are a convenient source of fiber, it is important to consider the rest of the ingredients. Some bars contain multiple forms of added sugar, which should be considered when managing overall sugar intake. The primary fiber source, chicory root extract, is a fermentable prebiotic fiber. While generally beneficial for gut health, a sudden increase in consumption can cause mild gastrointestinal discomfort, such as bloating, in some individuals as their system adjusts. It's advisable to increase fiber intake gradually and be aware of other ingredients that may not align with whole-food dietary goals.

Conclusion

Fiber 1 bars utilize a blend of fiber sources, primarily chicory root extract and sometimes soluble corn fiber, combined with whole grains, sweeteners, and various flavorings. The specific ingredients vary depending on the bar type, with protein bars incorporating additional protein sources and low-calorie options using sugar alternatives like allulose. While a convenient way to increase fiber intake, consumers should review the ingredient list carefully for added sugars and be mindful of potential digestive effects from the high fiber content. For more information on dietary fiber, consult reputable sources on nutrition.

The Role of Fiber in a Balanced Diet

Dietary fiber is essential for maintaining a healthy digestive system, regulating blood sugar levels, and promoting satiety. The Mayo Clinic highlights the importance of both soluble and insoluble fiber, noting that soluble fiber can help lower cholesterol and glucose levels, while insoluble fiber adds bulk to stool. The fibers in Fiber 1 bars, derived from sources like chicory root, act as soluble fibers and prebiotics, feeding beneficial gut bacteria. Learn more about fiber from the Mayo Clinic.

Frequently Asked Questions

Chicory root extract is a plant-based ingredient that provides inulin, a soluble dietary fiber. It is a key source of fiber in many Fiber 1 bars.

Some Fiber 1 products contain wheat or barley ingredients. Consumers with gluten sensitivity should always check the allergen warning on the specific product packaging, as ingredient formulations can vary.

Manufacturers use a combination of sweeteners, including corn syrup, fructose, and maltodextrin, to control the flavor profile and texture. Consumers should be mindful of the total sugar content.

No, the ingredients vary significantly by product line. For example, Chewy Oats & Chocolate bars contain whole grains, while Protein bars include added protein isolates.

Soluble corn fiber is a dietary fiber derived from corn starch. It is often used to add fiber and replace sugar, as it has a lower impact on blood sugar and adds bulk with fewer calories.

Yes, for some individuals, a sudden high intake of fiber, especially from chicory root extract, can lead to gastrointestinal side effects like gas and bloating. It is recommended to increase fiber intake gradually.

Some bars are formulated to be low in sugar and net carbs, using ingredients like allulose, which has a minimal impact on blood sugar, to fit within certain dietary plans.