<sod>Ghrelin cells are found mainly in the stomach <ref name = "pmid11600536">{{cite journal | vauthors = Ariyasu H, Takaya K, Tagami T, Ogawa Y, Hosoda K, Akamizu T, Suda M, Koh T, Natsui K, Toyooka S, Shirakami G, Usui T, Shimatsu A, Doi K, Hosoda H, Kojima M, Kangawa K, Nakao K | title = Stomach is a major source of circulating ghrelin, and feeding state determines plasma ghrelin-like immunoreactivity levels in humans | journal = The Journal of Clinical Endocrinology and Metabolism | volume = 86 | issue = 10 | pages = 4753–8 | date = October 2001 | pmid = 11600536 | doi = 10.1210/jcem.86.10.7885 }}</ref> and duodenum, but also in the jejunum, lungs, pancreatic islets,<ref name="pmid18508724">{{cite journal | vauthors = Suckale J, Solimena M | title = Pancreas islets in metabolic signaling—focus on the beta-cell | journal = Frontiers in Bioscience | volume = 13 | issue = 13 | pages = 7156–71 | year = 2008 | pmid = 18508724 | doi = 10.2741/3218 }}</ref> gonads, adrenal cortex, placenta, and kidney. It has recently been shown that ghrelin is produced locally in the brain<ref>{{cite journal | author = Ferrini F, Salio C, Lossi L, Merighi A | year = 2009 | title = Ghrelin in Central Neurons | url = | journal = Current Neuropharmacology | volume = 7 | issue = 1| pages = 37–49 | doi = 10.2174/157015909787602779 }}</ref><eod>
<sod>Ghrelin cells are found mainly in the stomach<ref name = "pmid11600536">{{cite journal | vauthors = Ariyasu H, Takaya K, Tagami T, Ogawa Y, Hosoda K, Akamizu T, Suda M, Koh T, Natsui K, Toyooka S, Shirakami G, Usui T, Shimatsu A, Doi K, Hosoda H, Kojima M, Kangawa K, Nakao K | title = Stomach is a major source of circulating ghrelin, and feeding state determines plasma ghrelin-like immunoreactivity levels in humans | journal = The Journal of Clinical Endocrinology and Metabolism | volume = 86 | issue = 10 | pages = 4753–8 | date = October 2001 | pmid = 11600536 | doi = 10.1210/jcem.86.10.7885 | url = http://press.endocrine.org/doi/10.1210/jcem.86.10.7885?url_ver=Z39.88-2003&rfr_id=ori%3Arid%3Acrossref.org&rfr_dat=cr_pub%3Dpubmed&}}</ref> and duodenum, but also in the jejunum, lungs, pancreatic islets,<ref name="pmid18508724">{{cite journal | vauthors = Suckale J, Solimena M | title = Pancreas islets in metabolic signaling—focus on the beta-cell | journal = Frontiers in Bioscience | volume = 13 | issue = 13 | pages = 7156–71 | year = 2008 | pmid = 18508724 | doi = 10.2741/3218 }}</ref> gonads, adrenal cortex, placenta, and kidney. It has recently been shown that ghrelin is produced locally in the brain<ref>{{cite journal | author = Ferrini F, Salio C, Lossi L, Merighi A | year = 2009 | title = Ghrelin in Central Neurons | url = | journal = Current Neuropharmacology | volume = 7 | issue = 1| pages = 37–49 | doi = 10.2174/157015909787602779 }}</ref><eod>