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Fiber One Chewy Bar
Photo: Open Food Facts contributors (CC BY-SA)

Cereal bars

Fiber One Chewy Bar

40 g

Bad out of 100 High confidence
  • Ultra-processed
  • Contains added sugars
  • Contains emulsifiers studied for gut effects
  • Contains seed oils
  • Contains palm oil
  • Contains whole grains
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Why it scores 12

Fiber One Chewy Bar scores 12 out of 100 (Bad) under GoodSwap’s published rules. What moved the score most:

  1. Corn syrup: An added sugar. Strong
  2. Sugar: An added sugar. Strong
  3. Ultra-processed (NOVA 4): Classified NOVA 4: made with industrial ingredients and additives. Strong

Every line of the math is on The Receipt below, with its evidence tier and sources.

Better granola and snack bars

The same kind of product, at least 10 points higher, sold in the US. Never paid placements.

The Receipt

Chewy Bar

START100

Ingredients

  • Corn syrup
    Strong An added sugar. [1][2][3]
  • Sugar
    Strong An added sugar. [1][2][3]
  • Fructose
    Strong An added sugar. [1][2][3]
subtotal−50

Processing

  • Ultra-processed (NOVA 4)
    Strong Classified NOVA 4: made with industrial ingredients and additives. [4]
  • 6 kinds of ultra-processing markers
    Emerging Industrial additive classes found: bulking agent, emulsifier, flavoring, humectant, industrial sugar or starch hydrolysate and thickener, stabilizer or gelling agent. [4]
subtotal−25.5

Nutrition per 100 g

  • Sugars 20 g / 100 g
    Strong Very high in sugar. [1]
  • Saturated fat 3.8 g / 100 g
    Strong High in saturated fat. [5]
  • Salt 0.5 g / 100 g
    Strong Contains some salt. [6]
  • Energy 375 kcal / 100 g
    Info Energy-dense for its weight. [2]
  • Fiber 22.5 g / 100 g
    Strong A good source of fiber. [2]
subtotal−13
TOTAL 12Bad

100 − 88.5 = 11.5 → 12

Can’t score above 79. Contains corn syrup, an ingredient of high concern. [1][2][3]

GTIN 00016000504622 · 2026-05-21

score v1.3.0 · kb 2026.10.11

High confidence

Same product, same score. Every time.

Nutrition per 100 g

Energy375 kcal
Fat10 g
Saturated fat3.8 g
Trans fat0 g
Carbohydrates75 g
Sugars20 g
Added sugars17.5 g
Fiber22.5 g
Protein5 g
Salt0.5 g

Serving: 1 bar (40 g)

Ingredients

High Moderate Not recognized Tap an ingredient for its evidence and rules.
Label text, as published

Chicory Root Extract, Whole Grain Oats, Corn Syrup, Semisweet Chocolate (sugar, chocolate liquor, cocoa butter, soy lecithin, natural flavor), Rice Flour, Sugar, Vegetable Glycerin, Canola and/or High Oleic Sunflower Oil, Palm Kernel Oil, Soy Lecithin, Maltodextrin, Tricalcium Phosphate, Cocoa Powder, Salt, Sugarcane Fiber, Cocoa Processed With Alkali, Fructose, Barley Malt Extract, Baking Soda, Cellulose Gum, Milk Powder, Natural Flavor. Vitamin E (mixed tocopherols) Added to Retain Freshness.

Allergens and diets

Contains: Milk, Soy, Gluten

  • Not vegan
  • Not gluten-free
  • Not palm-oil-free

Always check the package: recipes change.

Healthiest cereal bars in the US

More from Fiber One

Sources

  1. Guideline: sugars intake for adults and children

    World Health Organization · Mar 4, 2015 · Agency assessment

    “In both adults and children, WHO recommends reducing the intake of free sugars to less than 10% of total energy intake”

    who.int

  2. Dietary Guidelines for Americans, 2025–2030

    U.S. Department of Health and Human Services and U.S. Department of Agriculture · January 2026 · Regulator

    “Limit foods and beverages that include artificial flavors, petroleum-based dyes, artificial preservatives, and low-calorie non-nutritive sweeteners.”

    cdn.realfood.gov

  3. Added and free sugars should be as low as possible

    European Food Safety Authority · Feb 28, 2022 · Agency assessment

    “Sugar consumption is a known cause of dental caries.”

    efsa.europa.eu

  4. Ultra-processed foods: what they are and how to identify them

    Public Health Nutrition · April 2019 · Peer-reviewed

    doi.org

  5. Saturated fatty acid and trans-fatty acid intake for adults and children: WHO guideline

    World Health Organization · Jul 17, 2023 · Agency assessment

    “WHO recommends that adults and children reduce saturated fatty acid intake to 10% of total energy intake (strong recommendation).”

    who.int

  6. Sodium reduction (fact sheet)

    World Health Organization · May 11, 2026 · Agency assessment

    “For adults, WHO recommends less than 2000 mg/day of sodium (equivalent to less than 5 g/day salt), or just under a teaspoon.”

    who.int

  7. Ultra-processed food exposure and adverse health outcomes: umbrella review of epidemiological meta-analyses

    BMJ · Feb 28, 2024 · Peer-reviewed

    “Greater exposure to ultra-processed food was associated with a higher risk of adverse health outcomes, especially cardiometabolic, common mental disorder, and mortality outcomes.”

    doi.org

  8. Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake

    Cell Metabolism · July 2019 · Peer-reviewed

    doi.org

  9. Dietary emulsifiers impact the mouse gut microbiota promoting colitis and metabolic syndrome

    Nature · Mar 5, 2015 · Peer-reviewed

    “carboxymethylcellulose and polysorbate-80, induced low-grade inflammation and obesity/metabolic syndrome in wild-type hosts and promoted robust colitis in mice predisposed to this disorder.”

    doi.org

  10. Randomized Controlled-Feeding Study of Dietary Emulsifier Carboxymethylcellulose Reveals Detrimental Impacts on the Gut Microbiota and Metabolome

    Gastroenterology · March 2022 · Peer-reviewed

    “Relative to control subjects, CMC consumption modestly increased postprandial abdominal discomfort and perturbed gut microbiota composition in a way that reduced its diversity.”

    doi.org

  11. Food additive emulsifiers and risk of cardiovascular disease in the NutriNet-Santé cohort: prospective cohort study

    BMJ · Sep 6, 2023 · Peer-reviewed

    “This study found positive associations between risk of CVD and intake of five individual and two groups of food additive emulsifiers widely used in industrial foods.”

    doi.org

  12. Re-evaluation of the traditional diet-heart hypothesis: analysis of recovered data from Minnesota Coronary Experiment (1968-73)

    BMJ · Apr 12, 2016 · Peer-reviewed

    “replacement of saturated fat in the diet with linoleic acid effectively lowers serum cholesterol but does not support the hypothesis that this translates to a lower risk of death from coronary heart disease or all causes.”

    doi.org

  13. Dietary Fats and Cardiovascular Disease: A Presidential Advisory From the American Heart Association

    Circulation · Jul 18, 2017 · Peer-reviewed

    doi.org

  14. Dietary Linoleic Acid and Risk of Coronary Heart Disease: A Systematic Review and Meta-Analysis of Prospective Cohort Studies

    Circulation · Oct 28, 2014 · Peer-reviewed

    “These data provide support for current recommendations to replace saturated fat with polyunsaturated fat for primary prevention of CHD.”

    doi.org

  15. Commission Regulation (EU) 2023/915 of 25 April 2023 on maximum levels for certain contaminants in food

    European Union (Official Journal) · Apr 25, 2023 · Law

    “Glycidyl fatty acid esters, expressed as glycidol”

    eur-lex.europa.eu