Hi
My dentist says that it isn't good for your gums. The alcohol in it can burn away the gum tissue as time goes on. Personally, I can understand that only because when I use it that is what it feels like. Maybe don't use it twice a day....remember companies want to sell more of their product so they will tell you to use it a lot more! Kind of like shampoo saying you should wash, rinse, repeat....most people don't need to do that EVERY day!
I would recommend using Act at night.
Goodluck and I would go by what your dentist said.
Cat
Too much of a good thing can be a bad thing, or so I’m told 
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