That being said, not all forms of coffee can be easily had while you are Intermittent Fasting.
Do remember, while caffeine in itself may not be a bad ingredient, what you add to your coffee may make it unhealthy.
Adding excess amounts of sugar, whipping cream, topping ingredients (if you are having store-bought coffee) may add to your calorie count. Sugar alternatives like jaggery, honey, even if low-calorie, can still disturb your regime.
Again, adding milk may also be a contentious issue. While there are some who feel adding a spoonful or splash of milk to your coffee is okay and won’t break your fast, too much cream/ dairy or fat sources are best steered clear off.