Net Carbs, Total Carbs, and Fiber on Keto: What Your Recipe Label Must Show

The FDA Doesn't Define "Net Carbs"

Unlike "low fat" or "reduced sodium," the term "net carbs" has no official FDA definition or regulatory standard. This means companies can use it — but they take full responsibility for the claim's accuracy and cannot use it in a way that's misleading.

What the Nutrition Facts Panel Must Show

Regardless of net carb marketing, your nutrition facts panel must display:

• Total Carbohydrates (mandatory, per FDA)
• Dietary Fiber (mandatory)
• Total Sugars (mandatory)
• Added Sugars (mandatory since 2020)
• Sugar Alcohols (mandatory if present in a "sugar free" claim context)

You cannot omit total carbohydrates from the panel to highlight only net carbs.

Safe "Net Carb" Claim Language

Adding a supplemental net carb callout near the nutrition panel is common practice. Safe language:

"X g Net Carbs per serving (Total Carbohydrates X g − Dietary Fiber X g − Erythritol X g)"

Showing the calculation transparently protects against misleading-label claims because consumers can verify the math.

Sugar Alcohol Rules

Not all sugar alcohols are fully subtractable for the purpose of net carb calculations:

• Erythritol: 0.2 kcal/g → full subtraction is defensible
• Xylitol: 2.4 kcal/g → partial subtraction only
• Maltitol: 2.1 kcal/g → should only be half-subtracted; frequently misused in keto products

Generate Compliant Keto Labels

RecipeCalc's label generator computes total carbohydrates, dietary fiber and sugar content automatically from USDA data. You can add the net carb callout manually in the free-text section, and our FDA-format layout ensures all mandatory fields are present and correctly formatted.