Relationships Between Serum Serotonin and Serum Lipid Levels, and Aggression in Horses

Abstract

Levels of serum serotonin and serum lipids - triglyceride, total cholesterol, low-density lipoprotein, high-density lipoprotein and very low-density lipoprotein, were determined in normal horses and horses diagnosed with aggression on the basis of a questionnaire survey. Blood serotonin levels in aggressive horses were found to be significantly lower than in non-aggressive horses (P<0.01), but no association was found with respect to blood lipids.