Does stevia break a fast?
Usually calorie-safe, behavior can vary
0-5 kcal
Maybe - use caution. Stevia itself is nonnutritive, but sweet taste can make fasting harder for some people.
From a calorie standpoint it usually does not break a fast; from an appetite-training standpoint it can keep sweet cravings active.
The practical signal is the nutrition label: zero-sugar stevia products are typically near zero calories, while blends may include sugar alcohols or fillers.
Base tier: 60/100 for "Use caution". Item adjustment: +12 points for calories, nutrient signal, product variability, and safety caution. Final Fast Score: 72/100.
If it helps you stay consistent, use a small amount. If cravings rise, move it to the 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.