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Re:Show HN: Plant-based flavor enhancer – hack your tastebud... by WillPostForFood on Sunday January 24, 2021 @02:14PM (#25894821)
>This is primarily done to keep people from eating sugar when their teeth are most vulnerable.

SLS is primarily added as a foaming agent.

>Sodium lauryl sulfate is frequently used as a surfactant, or foaming agent. It may also serve as an emulsifier, helping oil based and water based ingredients to stay mixed. In many of our toothpastes SLS is used as a surfactant and helps to properly disperse the ingredients during brushing, and ensures easy rinsing and removal of debris (i.e. food particles).

https://www.tomsofmaine.com/our-promise/ingredients/sodium-l...

Re:Show HN: Plant-based flavor enhancer – hack your tastebud... by ac29 on Sunday January 24, 2021 @04:15PM (#25896132)
Not only that, but your teeth are at their least vulnerable after brushing. Sugar doesnt cause tooth decay, acidic bacterial metabolites of those sugars do.