我无法相信这不是牛油！ （英语：I Can't Believe It's Not Butter! 联合利华 所生产的黄油 代替品[ 2] [ 3] [ 4]
产品由位于美国 马利兰州 巴尔的摩 的J.H.菲尔贝特公司 [ 5] [ 1] [ 5] 华盛顿 出售，收购后联合利华于1988年将之推销至全美国；1991年开始在英国 、加拿大 及墨西哥 有售[ 6] [ 7] [ 8] [ 9]
^ 1.0 1.1 Lazarus, George (June 1, 1981). "Filbert can't believe you won't like its new butter blend" Archive.is 的存档 ，存档日期2013-01-31. Chicago Tribune . ("Filbert has moved into the Syracuse, Albany, and Pittsburgh markets with a one-pound blend called "I Can't Believe It's Not Butter."")
^ Calvani, Terry. Antiturst Law Journal , 1989, "Advertising Regulation: The States v. FTC. "...a nationally distributed butter substitute, 'I Can't Believe It's Not Butter.'")
^ Cerklewski, F.L. Journal of Food Composition and Analysis , 2005, "Calcium fortification of food can add unneeded dietary phosphorus". "...and butter substitute (I Can't Believe It's Not Butter..."
^ Brands for life . Unilever.com. [April 30, 2012] . （原始内容存档 于2021-03-19）. ^ 5.0 5.1 Unilever Corporate History . Unilever.com. [March 27, 2014] . （原始内容 存档于2014年4月2日）. ^ Wyman, Carolyn (2004). Better Than Homemade: Amazing Foods That Changed The Way We Eat （页面存档备份 ，存于互联网档案馆 ）ISBN 1931686424
^ I can't believe it's not Butter! . United Kingdom: Unilever.co.uk. [April 30, 2012] . （原始内容 存档于2012年5月13日）. ^ I Can't Believe It's Not Butter . Canada: Unilever.ca. [April 30, 2012] . （原始内容 存档于2014年4月2日）. ^ Jones, Geoffrey (2005). Renewing Unilever: Transformation and Tradition 页面存档备份 ，存于互联网档案馆 ）. Oxford University Press. pp. 102-03. ISBN 0199269432
美国
