My dentist has told me on numerous occasions that you shouldn't use Listerine twice a day because there is so much alcohol in the mouthwash itself it hurts your gums if you use it that frequently.

@domestic_goddess: Same here. I was also advised to use it just once a day, and even then to dilute it with a little bit of water.

I switched to Listerine Advanced a year ago, twice a day, and during my last dentist visit about a month and a half ago, my dentist said I have very healthy gums. So, I dunno.

Listerine 24 hour protection refers to the fact that it takes 12 hours for bacteria levels to return to normal after rinsing with Listerine, so if you rinse twice a day as instructed you get 24 hour protection. It's been so well researched and studied, there really aren't the side-effects that some people think there are. It can help keep you away from costly surgeries later in life. Use it or don't use it, but I'd rather spend a little money now on Listerine than $8000 on an implant later on.

Shertzerj and i will be healthy anyway.