One of the most noteworthy studies, conducted by researchers from the University of California San Diego also points to a familiar food villain – trans fats. They found that a high intake of trans fats is one of the best predictors of aggressive behavior, even when compared to other predictors like age, gender, alcohol intake, smoking, and so on. It’s worth noting that trans fats probably contribute to the problem because of their inhibitory effect on omega 3 metabolism. So, what do all of these studies mean? It’s pretty simple and clear.
Meat eating is no more a cause for aggression than miniskirts are for rape, or homosexuality for natural disasters. Nutritional deficiencies are a hallmark of societies where processed foods dominate the diet (as in the developed world), when there is severe food shortage and famine (as in parts of Africa), or when there is a predominantly vegetarian diet that excludes entire food groups. Of course, nutritional deficiencies are just one factor, while others like stress from work, social relationships, financial troubles, and so on have a greater role to play.