In the methodology of this study, participants with chronic insomnia symptoms were randomly assigned to consume either 130g of kiwi or pear an hour prior to bedtime daily for a period of 4 weeks. This followed a baseline assessment period of one week. Various outcome measures such as sleep diaries, actigraphy, and several questionnaires were used to evaluate the effects of this dietary change.

The results showed a distinct improvement in sleep quality and daytime functionality in participants who consumed kiwi, as reported in the sleep diaries. However, the objective measures such as actigraphy and certain questionnaires did not show any significant changes. Hence, the research indicates that kiwi might have properties that enhance sleep, especially in people dealing with chronic insomnia.