Guide

Coffee with honey breaks most fasts because honey adds sugar and calories; plain coffee keeps a clean fast for many goals.

Yes, coffee with Splenda can fit intermittent fasting for some goals, but sweeteners can blur “clean fast” rules and appetite control.

Yes, black coffee can fit a 3-day fast if it’s plain and unsweetened, but caffeine can feel stronger when you haven’t eaten.

Yes, plain black coffee usually fits a 72-hour fast, yet caffeine can change how you feel and handle the fast.

Yes, plain black coffee usually fits an intermittent fast, but sugar, milk, cream, and flavored add-ins can break it.

Black coffee has near-zero calories, so it often fits a water fast, but a strict water-only fast means water only.

Yes, unsweetened herbal tea is usually fine during a water fast, but strict water-only fasting means water only and some herbs aren’t safe.

Yes, you can brush with toothpaste while fasting if you don’t swallow, but some religious fasts prefer water-only brushing.

Yes, brushing your teeth while intermittent fasting is fine; avoid swallowing toothpaste, sweet rinses, or gum.

Yes, you can brush your tongue while fasting if you keep it dry and don’t swallow water, foam, or flavor.