[[datoteka:Taxol.svg|thumb|right|300px|[[Paclitaksel]] (taksol) je prirodni proivod izveden iz jedne vrste [[tisa (biljka)|tise]],  [[stabla]]šice ''[[Taxus brevifolia]]''.<ref name="CRC Press">{{cite book |url=https://books.google.com/?id=fOfFNOMkks8C&pg=PA5 |title=Biologically Active Natural Products: Pharmaceuticals | vauthors = Cutler S, Cutler HG | year = 2000 | publisher = CRC Press | page = 5 | isbn = 978-0-8493-1887-0 }}</ref>]]
'''Prirodni proizvod''' je [[hemijski spoj]] koji proizvode živi organizmi, čime se i  pojavljuje u [[priroda|prirodi]].<ref name="url_Natural_product_Webster">{{cite web | url = http://www.thefreedictionary.com/natural+product | title = Natural product | year = 1913 | format = | author = Webster's Revised Unabridged Dictionary  | publisher = Free Online Dictionary and C. & G. Merriam Co. | quote = A chemical substance produced by a living organism; - a term used commonly in reference to chemical substances found in nature that have distinctive pharmacological effects. Such a substance is considered a natural product even if it can be prepared by total synthesis. }}</ref><ref name="pmid17576412">{{cite journal | vauthors =  | title = All natural | journal = Nature Chemical Biology | volume = 3 | issue = 7 | pages = 351 | date=jul 2007 | pmid = 17576412 | doi = 10.1038/nchembio0707-351 | quote = "The simplest definition for a natural product is a small molecule that is produced by a biological source." }}</ref> U najširem smislu, prirodni proizvodi obuhvataju bilo koju tvar koju su proizvela [[život|živi organizmi]].<ref name = "Samuelson_1999">{{cite book | title = Drugs of Natural Origin: A Textbook of Pharmacognosy | author = Samuelson G | publisher = Taylor & Francis Ltd, | year = 1999 | isbn = 9789186274818 }}</ref><ref name="urlNatural Products Research—Information for Researchers | NCCAM">{{cite web | url = http://nccih.nih.gov/grants/naturalproducts | title = Natural Products Research—Information for Researchers &#124; NCCIH | author = National Center for Complementary and Integrative Health | date=13. 7. 2013 | work = | publisher = U.S. Department of Health & Human Services | quote = Natural products include a large and diverse group of substances from a variety of sources. They are produced by marine organisms, bacteria, fungi, and plants. The term encompasses complex extracts from these producers, but also the isolated compounds derived from those extracts. It also includes vitamins, minerals and probiotics. }}</ref> Prirodni proizvodi  također mogu nastati  [[hemijska sinteza|hemijskom sintezom]] (bilo [[semisinteza|semisintezom]] ili [[totalna sinteza|sveukuonom sintezom]]), a imali su centralnu ulogu u razvoju [[organska hemija|organske hemije]],  pružajući izazovne mete za hemijske sintetičare. Termin prirodni proizvod se isto tako upotrebljava u komercijalnoj primjeni za kozmetičke proizvode, prehrambene suplemente i hranu proizvedenu iz prirodnih izvora bez dodatka veštačkih [[aditiv]]a.<ref name="url_NPF_about_us">{{cite web | url = http://www.naturalproductsfoundation.org/index.php?src=gendocs&ref=about_us&category=About | title = About Us | work =  | publisher = Natural Products Foundation | access-date = 7. 12. 2013 | archive-date = 11. 12. 2013 | archive-url = https://web.archive.org/web/20131211123544/http://www.naturalproductsfoundation.org/index.php?src=gendocs&ref=about_us&category=About | url-status = dead }}</ref>