Recent research suggests that consuming more than two portions of mushrooms weekly can cut the risk of mild cognitive impairment (MCI) by 52 percent, while eating one to two portions can reduce it by 43 percent. A portion was defined as 3/4 of a cup of cooked mushrooms. These findings come from a six-year study that included more than 600 seniors living in Singapore. Researchers tested each participant’s cognitive function and conducted interviews and exams to determine their medical history and dietary habits.