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I seem to remember reading that fluoride in drinking water has no real effect on teeth, vs fluoride in toothpaste if you actually leave it in contact with your
by Saris 2y ago
I seem to remember reading that fluoride in drinking water has no real effect on teeth, vs fluoride in toothpaste if you actually leave it in contact with your teeth for several minutes like you're supposed to.
- OutOfHere 2y agoNo, you're not supposed to leave it in contact with your teeth for any period of time. If you do, you will start swallowing it. Swallowing it will cause stomach and cause other problems too. The reason is that sodium fluoride which exists in toothpastes is associated with testicular and hormonal dysfunction in males - refer to PMID 30165274.