Cold Zyme One Cold Mouth Spray Cold Zyme One Cold Mouth Spray makes it harder for the common cold virus to cause illness, & when used in the early stages of an infection it shortens the duration of the cold. Cold Zyme One Cold Mouth Spray forms a protective active enzyme barrier on the mucous membrane in your throat, which is where the cold virus takes hold & multiplies. This barrier traps the cold virus, disables its ability to bind in to human cells & helps your body to remove them naturally. The enzyme used is psychrophilic trypsin which has been clinically documented to be effective against the common cold. Cold Zyme One Cold Mouth Spray is suitable for adults & children over 4 years. It is free from sugar & preservatives. Each bottle of Cold Zyme One Cold Mouth Spray contains enough to last for one cold if you start using it when the first symptoms appear or to keep you from catching a cold on one occasion when it is particularly important to stay healthy, such as if you are travelling.