https://www.mouthhealthy.org/en/nutrition/food-tips/water-best-beverage?utm_source=mouthhealthyorg&utm_medium=mhtopstories&utm_content=water&fbclid=IwAR20TQmGCpOhJsAnXpaLG6BrYbNitXczIFwBoR9sRGlDQxt5BmodK9bXwyU#.XvyBN4daloY.facebook
https://www.mouthhealthy.org/en/az-topics/f/fluoride
http://www.webmd.com/oral-health/guide/dental-health-dental-care-products#1
http://www.ada.org/en/science-research/ada-seal-of-acceptance/product-category-information/mouthrinses