Depression risk and olive oil

People whose diets are high in trans fats - fast foods and mass-produced foods like pastries - may have a higher risk ofdepression, compared with those whose diets are rich in mono- and polyunsaturated fats.

The investigators counted the number of people with depression at the start of the study and then again during each follow-up. Cases of depression had to be those clinically diagnosed by a doctor.

The study authors found that when they compared the volunteers who consumed trans fats regularly with individuals whose dietary fat consisted primarily of olive oil, the trans fat consumers had a 48% higher risk of developing depression.

The amount of trans fat consumed was directly related to depression risk - the more they ate, the higher the risk.

Olive oil may reduce breast cancer risk

A team of scientists at the Universitat Autonoma de Barcelona in Spain found a key mechanism by which virgin olive oil protects the body against breast cancer, in contrast to other vegetable oils.

The researchers decoded a complete cascade of signals within the cells of breast tumors that are activated by virgin olive oil. They concluded that the oil reduces the activity of p21Ras, an oncogene, prevents DNA damage, encourages tumor cell death, and triggers changes in protein signaling pathways.

The team found that while corn oil - which is rich in n-6 polyunsaturated fatty acids - increased the aggressiveness of tumors, virgin olive oil had the opposite effect.

They demonstrated that virgin olive oil is linked to a higher incidence of benign (non-cancerous) breast tumors.