Here's one fact you should know. On the food label, if the trans fat is less than .5 grams, the label will say 0 trans fats. Be sure to look for the words hydrogenated oil on the ingredient label. Sorry, I'm just the messenger.
Want to know more: Listen to Walter C. Willett, MD, MPH, DrPH and Chair of the Department of Nutrition and Fredrick John Stare Professor of Epidemiology and Nutrition at the Harvard School of Public Health discuss the issue.