Trans Fat



According to the U.S. Dietary Guidelines, Americans should keep trans fat consumption as low as possible. Gram-for-gram, trans fat is the most harmful fat of all.



Trans Fat: On the Way out!

Trans fat forms when ordinary vegetable oil is hardened by treatment with hydrogen at high temperatures and pressures. That coverts a liquid into a semi-solid or solid (depending on the degree of hydrogenation) substance that became widely used in margarine, shortening, and countless other processed foods. Until 1990 few studies had shown that trans fat might be harmful to health. But then in the early 1990s careful, reliable clinical studies demonstrated that trans fat raises the "bad" LDL cholesterol, and lowers the "good" HDL cholesterol, in blood, thereby increasing the risk of heart disease. Subsequent research found that trans fat also stiffens arteries and may increase the risk of diabetes. Walter Willett and other epidemiologists at the Harvard School of Public Health estimated that trans fat was causing on the order of 50,000 premature heart-attack deaths each year.

Since 1993, the Center for Science in the Public Interest has sought to reduce the amount of trans fat in food, first by calling on the Food and Drug Administration to require that trans fat be included in Nutrition Facts labels. The FDA required that as of January 1, 2006. But because the evidence of the harmfulness of trans had become incontrovertible, in 2004 CSPI called on the FDA to ban the use of partially hydrogenated vegetable oil. On November 8, 2013, the FDA said it had preliminarily concluded that partially hydrogenated oils were could no longer be considered "generally recognized as safe," a step that could eliminate the ingredient from the food supply within a couple of years.

The amount of artificial trans fat (from partially hydrogenated vegetable oil) being put in our food has declined by more than 75 percent or more since about 2005. That was the result of the scientific research showing that trans fat is the most dangerous type of fat, coupled with massive bad publicity; lawsuits against Kraft (Oreos), McDonald's (French fries), KFC, and Burger King; and FDA's requirement that trans fat be listed on foods labels beginning in January 2006. Most major food manufacturers and chain restaurants have switched from the most harmful fat of all to healthier oils for most of their products.

Public health officials agree: the FDA needs to ban trans fat!



What's New

FDA Announcement Signals Eventual End to Artificial Trans Fat (November 7, 2013)


CSPI Cries Foul Over Artificial Trans Fat at Church's Chicken (September 10, 2013)


Long John Silver's "Big Catch" is Worst Restaurant Meal in America, Says CSPI (July 1, 2013)


More Progress Needed to Eliminate Artificial Trans Fat from Packaged Foods, Researchers Say (May 23, 2013)


Trans Fat Drop Huge Public Health Progress, Says CSPI (February 8, 2012)


Artificial Trans Fat Still in Supermarkets Despite Heart Risks (January 10, 2012)


Walmart to Require Elimination of Artificial Trans, Reduction of Sodium & Added Sugars (January 20, 2011)


Most Companies Replace Trans Fat with Healthier Fats, Study Finds (May 26, 2010)


Attack of the Zombie Trans Fat! (April 26, 2010)


New Leaders at FDA (March 14, 2009)


Maryland Bills Would Require Nutrition Info on Chain Restaurant Menus and Phasing Out Artificial Trans Fat (March 3, 2009)


PA Gov. Urged to Ignore Findings of Trans Fat Panel (February 2, 2009)


California Terminates Artificial Trans Fat! (July 25, 2008)


California Senate Votes to Phase-out Artificial Trans Fat from Restaurants (July 2, 2008)


Mass. House Tackles Artificial Trans Fat (June 4, 2008)


New Yorkers Want Statewide Phase-out of Artificial Trans Fat (April 24, 2008)


Baltimore Joins Montgomery County in Moving Toward Trans-Fat-Free Future (March 18, 2008)


Bay State Restaurants Still Using Artificial Trans Fat Despite Health Risks (March 13, 2008)


Court Rebuffs Burger King in Trans Fat Case (February 25, 2008)


Mass. Voters Favor Ridding Restaurants of Artificial Trans Fat (February 19, 2008)


Artificial Trans Fat to Leave Westchester County, NY (December 20, 2007)


Zero Should Mean Zero When it Comes to Trans Fat, Says CSPI (October 5, 2007)


TransFreeAmerica Campaign Launched (May 18, 2004)



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