First of all, from the name of zero-calorie candy, it seems that the sugar content in it is zero, but it may actually contain a little sugar. Sugar has no side effects on human body. It only provides some energy to the human body when it needs energy, so zero-calorie candy has no side effects on people.
Diabetic patients can eat zero-calorie candy, because the sugar content in zero-calorie candy is so low that it can be almost ignored, so eating a little for diabetic patients has little effect on the body and can also provide energy for the body.
To sum up, zero-calorie candy is a simple sugar substance, which has no side effects on people, and eating zero-calorie candy in moderation will not have much impact on the human body, and even have some benefits, so you can also eat zero-calorie candy food at ordinary times.