Editing Theophylline (section)

== Natural occurrences ==
Theophylline is naturally found in [[cocoa bean]]s. Amounts as high as 3.7&nbsp;mg/g have been reported in [[Criollo (cocoa bean)|Criollo]] cocoa beans.<ref name="ApgarTarka">{{Cite book | title = Caffeine | chapter = Methylxanthine composition and consumption patterns of cocoa and chocolate products and their uses | vauthors = Apgar JL, Tarka Jr SM | veditors = Spiller GA | publisher = CRC Press | year = 1998 | isbn = 978-0-8493-2647-9 | page = 171 | chapter-url = https://books.google.com/books?id=WxmBmvhsoZ8C&pg=PA171 | access-date = 2013-11-10 }}</ref>

Trace amounts of theophylline are also found in brewed [[tea]], although brewed tea provides only about 1&nbsp;mg/L,<ref>{{cite web | title = TABLE 2a: Concentrations of caffeine, theobromine and theophylline in tea products. | work = Food Surveillance Information Sheet Number 103 | publisher = MAFF, Department of Health and the Scottish Executive | url = http://archive.food.gov.uk/maff/archive/food/infsheet/1997/no103/table2a.htm | archive-url = https://web.archive.org/web/20060927200412/http://archive.food.gov.uk/maff/archive/food/infsheet/1997/no103/table2a.htm | archive-date=2006-09-27 }}</ref> which is significantly less than a therapeutic dose.

Trace amounts of theophylline are also found in guarana (''[[Paullinia cupana]]'') and in [[cola (plant)|kola nuts]].<ref name="pmid4013524">{{cite journal | vauthors = Belliardo F, Martelli A, Valle MG | title = HPLC determination of caffeine and theophylline in Paullinia cupana Kunth (guarana) and Cola spp. samples | journal = Zeitschrift für Lebensmittel-Untersuchung und -Forschung | volume = 180 | issue = 5 | pages = 398–401 | date = May 1985 | pmid = 4013524 | doi = 10.1007/BF01027774 | s2cid = 40205323 }}</ref>