Among minerals and enzymes, your saliva contains a high concentration of Oxygen to keep the anaerobes in check. Once your mouth gets even slightly drier, the anaerobic bacteria go wild and there is an instant increase in sulfur production. Yes, there is soap in toothpaste. Soap as everyone knows is very drying. Consequently, it will end up producing more of these sulfur compounds.
Soap is placed in toothpaste to create a foaming action.
The big companies think you need to see foam to believe your teeth are being cleansed. Since it causes this dryness, PerioGel does not contain Soap. Nearly every toothpaste on the market contains Saccharin to sweeten the product. Saccharin has been shown time and again to cause cancer in lab animals. PerioGel does not contain Saccharin.