Editing Tryptophan (section)

===Dietary sources===
Tryptophan is present in most protein-based foods or dietary proteins. It is particularly plentiful in [[chocolate]], [[oat]]s, dried [[Date Palm|date]]s, [[milk]], [[yogurt]], [[cottage cheese]], [[red meat]], [[egg (food)|eggs]], [[fish]], [[poultry]], [[sesame]], [[chickpea]]s, [[almonds]], [[sunflower seeds]], [[pumpkin seeds]], [[hemp]] seeds, [[buckwheat]], [[Spirulina (dietary supplement)|spirulina]], and [[peanut]]s. Contrary to the popular belief<ref name="scientificamerican">{{cite magazine|title=Does Turkey Make You Sleepy? | vauthors = Ballantyne C | date=2007-11-21 | url = http://www.scientificamerican.com/article.cfm?id=fact-or-fiction-does-turkey-make-you-sleepy | magazine = Scientific American | access-date = 2013-06-06 }}</ref><ref name = "McCue"/> that cooked [[turkey meat|turkey]] contains an abundance of tryptophan, the tryptophan content in turkey is typical of poultry.<ref name="USDA">{{cite web|url=http://www.ars.usda.gov/ba/bhnrc/ndl|title=USDA National Nutrient Database for Standard Reference, Release 22|last=Holden|first=Joanne|publisher=Nutrient Data Laboratory, Agricultural Research Service, United States Department of Agriculture|access-date=29 November 2009}}</ref>

{| class="wikitable sortable" style="text-align: center;"
|+ Tryptophan (Trp) content of various foods<ref name = "USDA" /><ref name="Rambali">{{cite journal | vauthors = Rambali B, Van Andel I, Schenk E, Wolterink G, van de Werken G, Stevenson H, Vleeming W | title=[The contribution of cocoa additive to cigarette smoking addiction] | journal=RIVM | year=2002 | url = http://rivm.nl/bibliotheek/rapporten/650270002.pdf | issue = report 650270002/2002 | publisher = The National Institute for Public Health and the Environment (Netherlands) | archive-url=https://web.archive.org/web/20051108071725/http://rivm.nl/bibliotheek/rapporten/650270002.pdf | archive-date=8 November 2005 }}</ref>
|-
! scope="col" | Food
! scope="col" | Tryptophan <br />[g/100 g of food]
! scope="col" | Protein <br />[g/100 g of food]
! scope="col" | Tryptophan/protein <br />[%]
|-
| style="text-align: left;" | [[Egg white]], dried || 1.00 || 81.10 || 1.23
|-
| style="text-align: left;" | [[Spirulina (dietary supplement)|Spirulina]], dried || 0.92 || 57.47 || 1.62
|-
| style="text-align: left;" | [[Atlantic cod|Cod, Atlantic]], dried || 0.70 || 62.82 || 1.11
|-
| style="text-align: left;" | [[Soybeans]], raw || 0.59 || 36.49 || 1.62
|-
| style="text-align: left;" | Cheese, [[Parmigiano-Reggiano|Parmesan]] || 0.56 || 37.90 || 1.47
|-
| style="text-align: left;" | [[Chia seed]]s, dried || 0.44 || 16.50 || 2.64
|-
| style="text-align: left;" | [[Sesame seed]] || 0.37 || 17.00 || 2.17
|-
| style="text-align: left;" | [[Hemp]] seed, hulled || 0.37 || 31.56 || 1.17
|-
| style="text-align: left;" | [[Cheddar cheese|Cheese, Cheddar]] || 0.32 || 24.90 || 1.29
|-
| style="text-align: left;" | [[Sunflower seed]] || 0.30 || 17.20 || 1.74
|-
| style="text-align: left;" | Pork, chop || 0.25 || 19.27 || 1.27
|-
| style="text-align: left;" | [[Turkey meat|Turkey]] || 0.24 || 21.89 || 1.11
|-
| style="text-align: left;" | [[Chicken (food)|Chicken]] || 0.24 || 20.85 || 1.14
|-
| style="text-align: left;" | [[Beef]] || 0.23 || 20.13 || 1.12
|-
| style="text-align: left;" | [[Oat]]s || 0.23 || 16.89 || 1.39
|-
| style="text-align: left;" | [[Salmon]] || 0.22 || 19.84 || 1.12
|-
| style="text-align: left;" | [[Lamb and mutton|Lamb, chop]] || 0.21 || 18.33 || 1.17
|-
| style="text-align: left;" | [[Perch|Perch, Atlantic]] || 0.21 || 18.62 || 1.12
|-
| style="text-align: left;" | [[Chickpea]]s, raw || 0.19 || 19.30 || 0.96
|-
| style="text-align: left;" | [[Egg (food)|Egg]] || 0.17 || 12.58 || 1.33
|-
| style="text-align: left;" | Wheat flour, white || 0.13 || 10.33 || 1.23
|-
| style="text-align: left;" | [[Baking chocolate]], unsweetened || 0.13 || 12.90 || 1.23
|-
| style="text-align: left;" | [[Milk]] || 0.08 || 3.22 || 2.34
|-
| style="text-align: left;" | Rice, white, medium-grain, cooked || 0.03 || 2.38 || 1.18
|-
| style="text-align: left;" | [[Quinoa]], uncooked || 0.17 || 14.12 || 1.20
|-
| style="text-align: left;" | Quinoa, cooked || 0.05 || 4.40 || 1.10
|-
| style="text-align: left;" | Potatoes, russet || 0.02 || 2.14 || 0.84
|-
| style="text-align: left;" | [[Tamarind]] || 0.02 || 2.80 || 0.64
|-
| style="text-align: left;" | [[Banana]] || 0.01 || 1.03 || 0.87
|}