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No, ash gourd juice contains calories, so drinking it during intermittent fasting breaks the fasting window.

No, barley water during intermittent fasting usually breaks the fast because the grain and add-ins add calories.

Yes and no—calorie-free fasts exclude buttermilk, while some religious fasts allow dairy outside fasting hours.

Yes, bulletproof coffee suits flexible fasting, but butter or MCT calories break a strict fast aimed at autophagy or lab-style fasting.

No, bulletproof coffee breaks a fasting window because butter and MCT oil add calories and fat.

Yes—plain carbonated water keeps a fast; sparkling wine adds calories and breaks an intermittent fast.

Yes, plain black tea during a fast is fine for most protocols because it has near-zero calories and no sugar.

No, black tea before a fasting blood test can skew results; choose plain water unless your lab gives written exceptions.

Yes, plain coffee with a squeeze of lemon fits most time-restricted fasts, as long as you skip sugar, milk, and calorie-dense add-ins.

No, ghee in black coffee during a fasting window adds calories and breaks a metabolic fast for fat loss and autophagy goals.