Editing Crest (toothpaste) (section)

==Crest Pro-Health mouthwash side effects==
===Tooth staining===
Crest Pro-Health mouthwash contains [[cetylpyridinium chloride]] which is known to cause [[Tooth discoloration|tooth staining]] in approximately 3 percent of users.<ref>{{cite news |first= Lisa Biank |last=Fasig |date=2007-04-09 |publisher=[[Cincinnati Business Courier]] |url=http://www.bizjournals.com/cincinnati/stories/2007/04/09/story3.html?market=cincinnati&year=2007&month=04&day=09&slug=story3.html&module=default&controller=stories&action=render |title=P&G hopes rinse effect won't wash away sales |quote=The company's Crest Pro-Health Rinse, launched with much promise in April 2005, is discoloring the teeth of about 3 percent of its users, the company said because it is doing its job.}}</ref> Crest has noted that this staining is actually an indication that the product is working as intended, as the stains are a result of bacteria dying on the teeth.<ref>{{cite web |publisher=Crest |access-date=2016-06-06 |title=Does Crest Pro-Health Rinse stain teeth brown? |url=http://news.crest.com/faq-item/health-rinse/does-crest-pro-health-rinse-stain-teeth-brown |archive-url=https://web.archive.org/web/20160306020259/http://news.crest.com/faq-item/health-rinse/does-crest-pro-health-rinse-stain-teeth-brown |archive-date=2016-03-06 |quote=Tooth discoloration could actually be one indication, in some people, that the product is working: after the rinse kills germs in your mouth, the dead germs can collect on the tooth surface and create the appearance of a brown stain.}}</ref> Crest stated that because of the low incidence of staining, there was no need to label Pro-Health mouthwash as a potential tooth stainer.<ref>{{cite news|last=Sewell |first=Dan |date=2008-05-07 |title=P&G's Pro-Health rinse draws complaints |url=http://abc11.com/archive/6129499/ |archive-url=https://web.archive.org/web/20160630111606/http://abc11.com/archive/6129499/ |archive-date=June 30, 2016 |publisher=WTVD-TV |agency=Associated Press |quote=Brinker said P&G doesn't see a need for a warning label because the number of those affected is very small. |url-status=dead |df=mdy }}</ref> However, after numerous complaints<ref>{{cite news |title=Crest rinse fights off customer complaints |newspaper=[[USA Today]] |date=2008-05-07 |url=http://usatoday30.usatoday.com/news/health/2008-05-07-crest-rinse_N.htm |quote=But NBC's Today show reported Wednesday that the complaints have led to a consumer lawsuit alleging fraud and to further study by the Food and Drug Administration, which approved the product.}}</ref> and a federal class-action lawsuit,<ref>{{cite news|last=White |first=Ed |date=2009-08-06 |title=Mich. lawyer sues, claims mouthwash stained teeth |work=San Diego Union-Tribute |agency=Associated Press |url=http://www.sandiegouniontribune.com/news/2009/aug/06/mi-mouthwash-brown-teeth-080609/ |archive-url=https://web.archive.org/web/20160806061433/http://www.sandiegouniontribune.com/news/2009/aug/06/mi-mouthwash-brown-teeth-080609/ |archive-date=August 6, 2016 |quote=Rossman's lawsuit seeks class-action status. It accuses P&G of violating the Michigan Consumer Protection Act by not putting a warning on the label. |url-status=dead |df=mdy }}</ref> which was later dismissed,<ref>{{cite web |url=http://www.drbicuspid.com/index.aspx?sec=ser&sub=def&pag=dis&ItemID=305224 |title=Mouthwash staining lawsuit dismissed |date=2010-07-26 |publisher=DrBicuspid.com |archive-url=https://web.archive.org/web/20160623153103/http://www.drbicuspid.com/index.aspx?sec=ser&sub=def&pag=dis&ItemID=305224 |archive-date=June 23, 2016 |quote=A U.S. District Court judge has dismissed a proposed class-action lawsuit filed against Procter and Gamble charging that the company's Crest Pro-Health mouthwash causes staining and browning of teeth |url-status=dead |df=mdy-all }}</ref> the mouthwash now contains a label warning consumers of its potential to stain teeth.<ref>{{cite news|first1=Darcy |last1=Wintonyk |first2=Lynda |last2=Steele |publisher=[[CTV Television Network|CTV British Columbia]] |date=2012-10-12 |title=Consumers spitting mad after mouthwash turns teeth brown |url=http://bc.ctvnews.ca/consumers-spitting-mad-after-mouthwash-turns-teeth-brown-1.993571 |archive-url=https://web.archive.org/web/20160606105706/http://bc.ctvnews.ca/consumers-spitting-mad-after-mouthwash-turns-teeth-brown-1.993571 |archive-date=June 6, 2016 |quote=The product does have a small print warning on the back label that reads: 'In some cases, antimicrobial rinses may cause surface staining to teeth,' but consumers have complained the warning label is buried in the product information. |url-status=dead |df=mdy }}</ref>

===Reducing premature birth===
The use of Crest Pro-Health mouthwash during pregnancy has been shown to be associated with a decrease in [[preterm birth]]s, presumably because the mouthwash reduces the severity of periodontal disease, which is directly linked to preterm births.<ref>{{cite news |title=Mouthwashing moms less likely to have a preemie |last=Grens |first=Kerry |date=2011-07-28 |work=[[Reuters]] |url=https://www.reuters.com/article/us-mouthwashing-moms-less-likely-have-pr-idUSTRE76R62620110728 |quote=Pregnant women with gum disease, also called periodontal disease, are known to have more preemies than women with healthy gums.}}</ref><ref>{{cite journal |last1=Jeffcoat |first1=Marjorie |last2=Parry |first2=Samuel |last3=Gerlach |first3=Robert W. |last4=Doyle |first4=Matthew J. |title=Use of alcohol-free antimicrobial mouth rinse is associated with decreased incidence of preterm birth in a high-risk population |date=October 2011 |journal=[[American Journal of Obstetrics & Gynecology]] |volume=205 |issue=4 |pages=382.e1–382.e6 |doi=10.1016/j.ajog.2011.07.016 |pmid=22083060 |url=http://www.ajog.org/article/S0002-9378%2811%2900917-3/abstract|url-access=subscription }}</ref>