Small trials, subjective endpoints and strong placebo responses make this a difficult area to read. Very little reaches moderate.
Sleep onset, duration and quality.
10 foods, grouped by the strongest rating any of its claims in this area reaches. Ratings describe the research, not the food. How ratings are decided.
Early human work, or mostly lab and animal research.
Matricaria chamomilla
An infusion of dried Matricaria chamomilla flower heads, containing no caffeine and no tea leaf. Most clinical research on…
Sleep quality: Small randomised trials of chamomile extract or tea report modest improvements in subjective sleep quality, mostly in older adults and postnatal women. The trials are small and short, endpoints are self-reported questionnaires, and this is an area with a large placebo response, so the finding is suggestive rather than established.
Prunus cerasus
The sour cherry species, distinct from sweet cherries and grown largely for juice, concentrate and processing. Montmorency is the…
Sleep quality: Some small trials report modest increases in sleep time or efficiency with tart cherry juice. Sample sizes are very small, outcomes are often self-reported, and the melatonin content of the juice is far below a typical supplement dose.
Not enough human research to say anything useful yet.
Musa acuminata
The fruit of a large tropical herb, harvested green and ripened after picking. Ripening converts most of its starch into sugars,…
Sleep quality: Bananas are often recommended before bed for their magnesium and tryptophan content. There is no dependable human research showing that eating one changes how quickly people fall asleep or how well they sleep.
A fresh, unripened cheese made by acidifying milk and draining the curd without pressing, leaving the loose grains in a little…
Sleep quality: Evidence is limited for cottage cheese before bed affecting sleep. Pre-sleep casein has been tested for overnight muscle protein synthesis rather than for sleep itself, and the sleep claim has essentially no direct human data behind it.
Actinidia deliciosa
A fuzzy-skinned berry from a woody vine, with green or golden flesh and small edible black seeds. It contains actinidin, a…
Sleep quality: A single small uncontrolled study is the origin of the widely repeated advice to eat kiwifruit before bed. That is not enough to support a dependable conclusion about sleep.
Myristica fragrans
The seed kernel of Myristica fragrans; mace is the lacy red aril around the same seed. The USDA entry is per 100 g of ground…
Sleep quality: Nutmeg has a folk reputation as a sleep aid, usually as a pinch in warm milk. No adequate human trial supports it, and the amounts sometimes recommended online approach the range at which nutmeg causes poisoning.
Mentha × piperita
An infusion of dried or fresh peppermint leaf, containing no caffeine and no tea leaf. USDA does not publish a…
Sleep quality: Peppermint tea is often drunk as an evening wind-down, and the absence of caffeine is a real difference from ordinary tea. Trials testing peppermint infusion on sleep outcomes are essentially absent, so nothing can be concluded about the drink itself.
Cucurbita pepo
The hulled green kernels of certain pumpkin and squash varieties, eaten raw or roasted. The USDA reference entry is for the dried…
Sleep quality: Pumpkin seeds are marketed for sleep on the basis of their tryptophan content. There is no dependable human evidence that eating them changes sleep, and dietary tryptophan competes with other amino acids for transport into the brain, which limits the plausibility of the mechanism at food doses.
Meleagris gallopavo
The white pectoral muscle of the domestic turkey, leaner and larger-grained than chicken breast. Fresh roasting joints and…
Sleep quality: Evidence is limited for turkey affecting sleep. The familiar claim rests on its tryptophan content, but turkey is not unusually high in tryptophan among meats, and dietary protein supplies competing amino acids that limit how much reaches the brain.
Bos taurus
Cow milk with its fat left in, standardised to around 3.25% in most markets and almost always pasteurised. It is an emulsion in…
Sleep quality: Evidence is limited for warm milk before bed improving sleep. The few human studies are small, often use fortified or specially collected milk rather than ordinary milk, and cannot separate the drink from the bedtime routine around it.