Editing Chocolate (section)

===Caffeine===
One tablespoonful (5 grams) of dry unsweetened [[cocoa powder]] has 12.1&nbsp;mg of caffeine<ref>{{Cite web|url=https://nutritiondata.self.com/facts/sweets/5471/2|title=Cocoa, dry powder, unsweetened Nutrition Facts & Calories|website=nutritiondata.self.com|language=en-US|access-date=24 August 2018|archive-date=24 August 2018|archive-url=https://web.archive.org/web/20180824034242/https://nutritiondata.self.com/facts/sweets/5471/2|url-status=live}}</ref> and a 25-g single serving of dark chocolate has 22.4&nbsp;mg of caffeine.<ref>{{Cite web|url=https://nutritiondata.self.com/facts/sweets/10638/2|title=Candies, chocolate, dark, 70–85% cocoa solids Nutrition Facts & Calories|website=nutritiondata.self.com|language=en-US|access-date=24 August 2018|archive-date=24 August 2018|archive-url=https://web.archive.org/web/20180824034245/https://nutritiondata.self.com/facts/sweets/10638/2|url-status=live}}</ref> This is much less than the amount found in coffee, of which a single 7&nbsp;oz. (200&nbsp;ml) serving may contain 80–175&nbsp;mg of caffeine,<ref name="Bunker">{{cite journal|last1=Bunker|first1=M. L.|last2=McWilliams|first2=M.|year=1979|title=Caffeine content of common beverages|journal=Journal of the American Dietetic Association|volume=74|issue=1|pages=28–32|doi=10.1016/S0002-8223(21)39775-9|pmid=762339|s2cid=10192823}}</ref> though studies have shown psychoactive effects in caffeine doses as low as 9&nbsp;mg, and a dose as low as 12.5&nbsp;mg was shown to have effects on cognitive performance.<ref>{{Cite journal|last1=Smit|first1=H. J.|last2=Rogers|first2=P. J.|date=October 2010|title=Effects of low doses of caffeine on cognitive performance, mood and thirst in low and higher caffeine consumers|journal=Psychopharmacology|volume=152|issue=2|pages=167–173|issn=0033-3158|pmid=11057520|doi=10.1007/s002130000506|s2cid=7176784}}</ref>