How we assign the verdict
Ketorai answers one question for each food: is it keto? The verdict is based on the net carbs of a real serving, not a fixed 100 g.
The rule
Net carbs
net carbs = total carbs − fiber − sugar alcohols (never below 0)
Real serving
We use the typical serving (1 medium fruit, 1 cup, 1 tablespoon for condiments, 1 glass for drinks), because the verdict should reflect how food is actually eaten.
Data and sources
Nutrition values follow standard references, mainly the USDA FoodData Central database, adjusted to the real serving. Each entry shows its source and a confidence level (high / medium / low): when a value is an estimate or varies a lot between brands, we mark it with lower confidence instead of feigning precision.
How we use AI
To scale to hundreds of foods, a language model writes a first draft of each entry from those standard nutrition references, following strict rules (real serving, net-carb calculation and the thresholds above). Entries with uncertain data are marked medium or low confidence. We don't make up numbers: when the model isn't sure, confidence drops.
Who's behind it
Ketorai is maintained by an editorial team focused on keto nutrition and on making it easy to understand. Learn more at About Ketorai.
Found an error?
If a value is off, let us know from the contact page. We review and fix it. This doesn't replace advice from a health professional.
Methodology last reviewed: June 28, 2026.