The study is part of a growing body of research that demonstrates how healthy eating plans have a positive impact on mental health.

Four Montenegrin olive harvesting experts delivered the small country its first World Olive Picking Championship, defeating two-time champion Croatia. Neighboring Bosnia and Herzegovina finished in second place.

The announcement of the U.S. tariffs comes as protestors head to Madrid to demand action on low olive oil prices. Government officials fear Andalusia, one of Spain's poorest regions, will be hit the hardest by the tariffs.