TransFat

the nastiest kind of fat

French fries (until McDonalds changes the recipe again)

beware the label Partially Hydrogenated - which you'll find consistently in baked goods

http://www.enig.com/trans.html

http://www.cbc.ca/healthmatters/recentstories/CBC.ca-Healthmatters-Transfat.html

<http://www.vanderbilt.edu/An S/psychology/health_psychology/Transfat.htm>