Instant coffee with milk, unsweetened Calories

Yes. The instant coffee provides caffeine, though the amount varies with the coffee and how much you use. If caffeine affects you strongly, make a smaller cup or choose a time earlier in the day.

It has no added sugar, but milk naturally contains lactose, a type of sugar. So “unsweetened” does not necessarily mean the drink contains absolutely no sugars.

You can, but its caffeine may make it harder to fall asleep or stay asleep, especially if you are sensitive to caffeine. If you notice this effect, have it earlier in the day.

Yes. For a smoother cold drink, dissolve the instant coffee in a small amount of hot water first, then stir in cold milk. Add ice if you like, since coffee granules may not dissolve as easily in cold liquid.

Dissolve the coffee in hot water first, then add the milk. This makes it easier to mix evenly and avoid undissolved granules; adding milk first can also cool the liquid before the coffee dissolves.

Yes, it breaks a strict fast because the milk provides energy and makes the drink more than plain coffee or water. For fasting that allows milk, follow the rules of your specific fasting plan.

No, a moderate coffee drink still contributes fluid. Caffeine can increase urination temporarily, particularly in people who do not usually consume it, but the drink does not simply cancel out its water content.

Yes, you can reheat it gently, but avoid boiling it because the milk may scorch or develop an unpleasant texture. Stir as it warms and drink it promptly rather than reheating the same cup repeatedly.

It is best consumed soon after preparation. If you need to save it, cover it and refrigerate it promptly, then use it as soon as practical; discard it if it has been left out for a long time or its smell or appearance changes.