Trans fat isn't crooked—and that's the problem. Though it's chemically identical to natural fats, it doesn't bend. Here's a clear and simple explanation of why, what it means, and why trans fats are so dangerous.
In the first study of its kind researchers have linked trans fatty acid consumption to increased aggression in humans. Published in the Public Library of Science’s own journal, PLoS, March 5th 2012, researchers at the Dept. of Medicine at the University of California, San Diego, reported: "This study provides the first evidence linking dTFA [dietary trans fatty acids] with behavioral irritability and aggression."