Nutrition label guide
Fiber, carbs, and sugar: how to compare label math
The fiber and sugar block looks like the simplest part of a nutrition panel. It stops being simple as soon as you compare two products with different serving sizes and different sweetener systems.
The quick read
- FDA fiber guidance sets out how fiber is disclosed and how percent Daily Value gives buyers a basis for comparison. FDA questions and answers on dietary fiber FDA changes to the Nutrition Facts label
- The Nutrition Facts format is what lets you compare carbohydrate profiles across brands before deciding which story to trust. FDA changes to the Nutrition Facts label FDA dietary supplement labeling guide
- A fiber or gut-related claim becomes checkable when the fiber type and amount appear at the serving level. FDA questions and answers on dietary fiber FDA supplement claim substantiation guidance
- Sugar and sweetener wording needs to stay attached to the serving math and to daily use. FDA changes to the Nutrition Facts label FTC health products compliance guidance
What the evidence says
Bottom line
Fiber grams, sugar grams, and carbohydrate composition per serving. Those three tell you quickly whether a label was built to be read or built to be dense. FDA changes to the Nutrition Facts label FDA questions and answers on dietary fiber
A product can be genuinely high in fiber and still overdo sugar or sugar substitutes. Both facts live on the same panel. FDA dietary supplement labeling guide FDA changes to the Nutrition Facts label
Shop zero-sugar prebiotic fiber and magnesium gummies on Herbspro
NutriScore may earn a commission if you buy through these links. Every button opens the Goli Nutrition collection on Herbspro. Amounts and uses match the bottles and page facts, checked October 23, 2026. Affiliate disclosure.
Zero SugarGoli Pre+Post+Probiotics Zero Sugar gummies
The bottle prints 60 gummies for digestive health, immune support, and a balanced gut. The Herbspro Zero Sugar listing (3 gummies per serving) lists 6 g total carbohydrate, 5 g dietary fiber (soluble tapioca fiber and fructooligosaccharides), 0 g total sugar, 50 mg xylooligosaccharides (XOS), 10 mg Bacillus subtilis DE111 (1 billion live cells), and 20 mg heat-treated Lactobacillus paracasei MCC 1849.
Zero SugarGoli zero-sugar magnesium glycinate gummies
The bottle prints 60 gummies, zero sugar, 1,100 mg magnesium glycinate per serving, 125 mg elemental magnesium per serving, and Calm, Serenity, Balance. The page facts set the serving at 3 gummies with 5 mcg vitamin D2 and 5 g dietary fiber.
Fiber claims and actual composition
A fiber claim is worth exactly as much as the fiber type disclosed next to it and the unit it is expressed in. FDA questions and answers on dietary fiber FDA supplement claim substantiation guidance
Where a product markets digestive comfort, the carbohydrate and fiber section deserves the same clarity as any active ingredient. FTC health products compliance guidance FDA dietary supplement labeling guide
Readable and unreadable labels
Good labels keep fiber, carbs, and sugar tied to the serving size and to the outcome the product claims. FDA changes to the Nutrition Facts label FDA questions and answers on dietary fiber FDA dietary supplement labeling guide
Weak ones use a broad claim to cover a carb and fiber block that is hard to follow on purpose. FTC health products compliance guidance FDA supplement claim substantiation guidance
What to check on the label
Fiber clarity
Check that both the fiber grams and the fiber type are stated.
Carb context
Compare sugars and total carbs per serving rather than per marketing block.
Claim fit
Reject gut claims that the disclosed carbohydrate composition does not support.
Featured in this guide
Ready to inspect the label or buy?
NutriScore may earn a commission if you buy through these links. Affiliate disclosure.
Sources
- FDA questions and answers on dietary fiber: https://www.fda.gov/food/food-labeling-nutrition/questions-and-answers-dietary-fiber
- FDA changes to the Nutrition Facts label: https://www.fda.gov/food/nutrition-food-labeling-and-critical-foods/changes-nutrition-facts-label
- FDA dietary supplement labeling guide: https://www.fda.gov/food/dietary-supplements-guidance-documents-regulatory-information/dietary-supplement-labeling-guide-chapter-iv-nutrition-labeling
- FDA supplement claim substantiation guidance: https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-industry-substantiation-dietary-supplement-claims-made-under-section-403r-6-federal-food
- FTC health products compliance guidance: https://www.ftc.gov/business-guidance/resources/health-products-compliance-guidance
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How this article was made
NutriScore has not commissioned independent clinical review of this article.
Read the editorial policy and scoring methodology. Sources favor primary canon, regulators, product labels, and peer-reviewed research; reputable secondary reporting is identified when used.
Corrections: send corrections or updated label/source evidence to support@nutriscore.fit or use the contact page.
Sources: 5 entries, primary canon plus reputable secondary sources with inline acknowledgment, last reviewed 2026-09-01.
For research and educational purposes only. Not medical advice.