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Yes—plain coffee fits most time-restricted fasts; lemon adds ~3 kcal per tbsp and can break stricter, medical, or religious fasts.

No, ghee adds calories to coffee, breaking a strict intermittent fast; plain black coffee is zero-calorie and typically allowed.

Yes, most adults can drink black coffee with lemon before breakfast, but reflux, ulcers, or pregnancy warrant caution and modest portions.

Yes—plain black coffee during pre-test fasting is usually not allowed unless your provider says otherwise; many labs permit only water.

Yes, plain black coffee fits most fasting windows since it adds ~2 calories and no macros.

Yes, black coffee during pregnancy can fit a 200 mg caffeine limit when portions stay small and total intake is tracked.

No—most fasting blood tests allow only water; coffee, even black, can change results unless your provider says otherwise.

Yes, black coffee is okay in small sips when warm, but it can dry or irritate a sore throat—choose warm, not hot, and switch to decaf if sensitive.

Yes, black coffee counts as a clear liquid for colonoscopy prep, but stop all drinks by your clinic’s cut-off and skip any milk or creamer.

Yes, plain coffee can fit with PCOS when caffeine stays moderate and you skip sugar-heavy add-ins.