http://www.colgate.com/en-us/oral-health/life-stages/adult-oral-care/looking-after-your-teeth-five-new-years-resolutions-for-a-healthier-mouth-1214
https://www.livestrong.com/article/529504-is-apple-cider-vinegar-bad-for-tooth-enamel/
https://www.sciencedaily.com/releases/2015/10/151021115120.htm
https://www.deltadentalins.com/oral_health/holiday-sweets.html