ZINNIA CATOX EZYME is a highly concentrated enzyme that can help in the breakdown and digestion of food. If you take it and then do not drink water for a long time, for example, for those taking it before bedtime and go to sleep immediately without drinking water, in this situation, the enzymes may remain on the surface of the tongue, initiating the breakdown of oral residues, resulting in a sour or painful sensation on the tongue. It is recommended that after directly consuming ZINNIA CATOX EZYME powder, take with a small amount of water (50ml) to prevent enzyme residues on the tongue, which can lead to a sour or painful sensation.