People with sleep disorders have a high degree of oxidative stress so it helps to eat antioxidant-rich foods. All fruits and vegetables have antioxidants but kiwi fruits contain twice as much serotonin as tomatoes additionally contains kiwi folic acid. A folic acid deficiency can lead to insomnia.
Research on eating kiwis has yielded remarkable results. Participants fell asleep faster and slept six to seven a night by eating a few kiwis.