Editing Tea (section)

== Health effects ==
{{Main|Health effects of tea}}
Although health benefits have been assumed throughout the history of ''[[Camellia sinensis]]''[[Camellia sinensis|<nowiki/>'s]] consumption, there is no high-quality evidence showing that tea consumption gives significant benefits other than possibly increasing alertness, an effect caused by [[caffeine]] in the tea leaves.<ref name="medline">{{cite web |date=30 November 2017 |title=Black tea |url=https://www.nlm.nih.gov/medlineplus/druginfo/natural/997.html |access-date=27 February 2018 |publisher=MedlinePlus, US National Library of Medicine}}</ref><ref name="nccih2">{{cite web |date=30 November 2016 |title=Green tea |url=https://nccih.nih.gov/health/greentea |access-date=27 February 2018 |publisher=National Center for Complementary and Integrative Health, US National Institutes of Health}}</ref> In [[clinical research]] conducted in the early 21st century, it was found there is no scientific evidence to indicate that consuming tea affects any disease or improves health.<ref name="medline" />

Black and green teas contain no [[Nutrient|essential nutrients]] in significant amounts, with the exception of the [[Mineral (nutrient)|dietary mineral]] [[manganese]], at 0.5&nbsp;mg per cup or 26% of the [[Reference Daily Intake]] (RDI).<ref>{{cite web |date=2014 |title=Tea, brewed, prepared with tap water [black tea], one cup, USDA Nutrient Tables, SR-21 |url=http://nutritiondata.self.com/facts/beverages/3967/2 |url-status=live |archive-url=https://web.archive.org/web/20141026201138/http://nutritiondata.self.com/facts/beverages/3967/2 |archive-date=26 October 2014 |access-date=25 October 2014 |publisher=Conde Nast}}</ref> [[Fluoride]] is sometimes present in tea; certain types of "brick tea", made from old leaves and stems, have the highest levels, enough to pose a health risk if much tea is drunk, which has been attributed to high levels of fluoride in soils, acidic soils, and long brewing.<ref>{{cite journal |vauthors=Fung KF, Zhang ZQ, Wong JW, Wong MH |year=1999 |title=Fluoride contents in tea and soil from tea plantations and the release of fluoride into tea liquor during infusion |journal=Environmental Pollution |volume=104 |issue=2 |pages=197–205 |doi=10.1016/S0269-7491(98)00187-0}}</ref>