First of all we should know what is water fasting and why people do this?
So Water fasting is a type of fasting in which the practitioner consumes only water. One may water fast for a variety of reasons, including medical and religious requirements.
So, a fast can result in weight loss as the body uses up fats in the body for its energy.
But it should not be forgotten that the best way to lose weight is to take it slowly, combining a healthy diet with exercise.
Now the question comes can we take green tea during water fasting?
So the answer is definitely yes, if you take the green tea plain i.e. without adding anything like sugar. Because the aim of water fasting is to stay only on liquid without any calorie. And green tea contains almost zero calorie. So here it simplifies the question that yes you can definitely take green tea during water fasting.