In a word–probably. In the first study examining the effects of trans fat consumption on behavior, University of California-San Diego researchers report the fats can make people more aggressive and irritable.
Researchers knew that trans fats inhibit the body’s synthesis of omega-3 fats. Knowing that omega-3s are associated with reduced aggression and irritability, they speculated that consuming trans fats might increase negative feelings and aggression.
They tested their hypothesis by giving 945 adults a behavioral assessment that included self-reported feelings of impatience and irritability as well as any history of aggression.
The scientists concluded, “We found that greater trans fatty acids were significantly associated with greater aggression, and were more consistently predictive of aggression and irritability, across the measures tested, than the other known aggression predictors that were assessed.”
from Tufts University Health & Nutrition Update, April 13, 2012 Study by University of California-San Diego, published in PLoS ONE