Every answer starts with calories and nutrient signal, then adds real-world context: labels, supplements, medications, appetite behavior, and safety cautions.
Fast Score is an editorial clean-fasting score from 0 to 100. It is not a medical score. The decision label is primary; the number makes strictness easier to compare.
Item-specific adjustments account for usual serving size, calories, product variability, nutrient signaling, and safety caution. The score never replaces the text decision.
Zero or near-zero calorie choices that fit a clean fasting window for most goals.
Low-calorie or label-dependent choices where appetite, sweeteners, medication timing, or product variability matters.
Items with meaningful calories, protein, fat, sugar, or amino acids that end a strict clean fast.
Normal foods or supplements that belong after the fasting window opens.
FastingCalorie does not tell users to delay, skip, or stop medication. If a medication label or clinician says to take it with food, the fasting answer is to follow that instruction.
Diabetes medication, insulin, blood pressure medication, seizure medication, antibiotics, pregnancy, eating disorder history, kidney disease, and stimulant-heavy products require clinician guidance.
We use these sources for calorie lookup, label interpretation, supplement caution, and medication safety framing.
Baseline calorie and macronutrient checks for foods, oils, vinegars, fruits, and low-calorie ingredients.
Medication safety language: do not skip, stop, or delay medicines to preserve a fasting window.
Clinical caution for fasting with diabetes, blood sugar risk, insulin, or glucose-lowering medication.
Supplement context for creatine, caffeine, amino acids, performance products, and proprietary blends.
General supplement evidence and safety framing for vitamins, minerals, botanicals, and probiotics.
Regulatory caution that supplements are not reviewed like conventional foods or drugs before sale.
Label-reading guidance for sugar-containing gummies, drinks, sweeteners, and packaged fasting products.
The most-searched answer cards, each scored with the methodology above.
