A study in Japan has found a link between regular natto consumption and lower rates of cognitive decline and depression in older adults. Eating natto at least twice a week is associated with lower rates of mild cognitive impairment and depressive symptoms.

Further details of the study are available, including its findings on the relationship between natto consumption and cognitive health.

The study's results suggest a potential benefit to regular natto consumption for older adults, although full details of the research are not provided here.