The EatSmart Black Coffee Instant is a beverage characterized by a high caffeine content and a strong flavor, which is suitable for people who need to refresh themselves or improve their mental state. However, the claim that the product will "blacken the intestines" is incorrect. First of all, the ingredients in black coffee do not cause the intestines to turn black. Second, the color of the intestines is not directly related to the color of the food or drink consumed.

So, this statement is not scientific, do not worry about drinking black coffee instant will lead to intestinal black.