Does Eating Kiwifruit Before Bed Actually Help You Sleep?

I love a sleep intervention that costs almost nothing and has a plausible mechanism, so when the "two kiwis before bed" thing kept resurfacing, I went looking for the actual data instead of the wellness telephone-game version. The origin point is a 2011 trial out of Taiwan where adults with self-reported sleep problems ate two kiwifruit an hour before bed for four weeks (see [1]). Sleep onset latency dropped, total sleep time went up, and subjective sleep quality improved on the Pittsburgh Sleep Quality Index. The proposed mechanism is a combo of serotonin (kiwi is genuinely high in it), folate, and antioxidant content interacting with sleep regulation. Interesting, but that study was unblinded, uncontrolled, and small — exactly the kind of thing I'd file under "promising, prove it on yourself."