Fats linked to low mood

Trans-fatty acid, the junk food staple that commonly takes the form of partially hydrogenated vegetable oils, not only raises the risk of cardiovascular disease, it’s now also been linked to depression. 

A prospective cohort study of just over 12,000 Spanish graduate students with a mean age of 37.5 years found that those who ate the most trans fat had an increased depression risk.

Those who ate the most olive oil had a lower risk than those with low or no olive oil consumption. Individuals in the group with the highest intake of trans fat were eating only about 1.5 g daily, but their risk of depression increased by 48%. Both olive oil and trans fat produced dose response relationships. 

“Depression and CVD seem to share some common mechanisms leading to similar biological changes,” the authors say. 

PLoS ONE, online 26 Jan