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Does cucumber break a fast?
8
/ 100
Eating window
Low calorie, but still food
10-20 kcal
Use during the eating windowhigh confidenceClean-fasting principle
Decision
Use during the eating window. Cucumber is very low calorie, but eating it still starts the eating window.
Reason
Clean fasting is not only about high calories; it is about not eating during the fasting window.
Evidence
Cucumber has low but measurable calories and carbohydrates in nutrition data.
How we calculate this value
Base tier: 10/100 for "Eating window". Item adjustment: -2 points for calories, nutrient signal, product variability, and safety caution. Final Fast Score: 8/100.
What to do
Save cucumber for the eating window or use it as a gentle first food.
References for this answer
MethodologyRelated reading
Best foods to break a fast
More “eating window”
The Fast Score is an editorial estimate of clean-fast strictness, not medical advice. Goals vary — if you fast for glucose, appetite, or medical reasons, follow your clinician.