Senior author, Dr Robert Krikorian said: “The cognitive Ondings indicated improved executive ability in this middle-aged sample [who had blueberries].

“’ The demonstration of these benefits in middle-aged individuals with insulin resistance and [subjective cognitive decline] suggests that ongoing blueberry supplementation may contribute to protection against cognitive decline when implemented early in at-risk individuals.”

The academics added: “In summary, this study demonstrated that blueberry supplementation has neurocognitive benefit in middle-aged individuals with insulin resistance and an elevated risk for future dementia.”

According to the researchers, blueberries improve an individual’s memory because they are full of anthocyanins, a Vavonoid which decreases inflammation.