If you don’t have green tea in your break room, you might want to consider stocking up.

A recent study shows that it increases the performance of working memory – which, of course, is critical to all sorts of mental tasks, including learning.

Researchers divided study participants into two groups. One group was given a smoothie containing green tea extract; the other received a placebo beverage. Afterwards, both groups were given a series of working-memory tasks.

The green tea drinkers performed significantly better on each task. When the scientists measured the participants’ brain activity, they found that the green tea group had increased activity across several areas of the brain related to memory.

Source: Schmidt, A. (2014). Green tea extract enhances parieto-frontal connectivity during working memory processing. Psychopharmacology, 231(19), 3879-3888.

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