HerbClinical dose · Positive sleep trials used juice or concentrate (240mL of juice twice daily for 2 weeks in older adults with insomnia); 500mg/day of powder for 14 days did not improve sleep, and powder has not been shown to equal juiceOnset · Positive trials measured sleep after 7 days to 2 weeks; trials of 14–30 days with powder, capsules or juice found no benefit

Tart Cherry (Montmorency)

Name: Tart Cherry (Montmorency) — Human Clinical Effect Matrix
Creator: The Nootropic Lab
License: https://creativecommons.org/licenses/by/4.0/

The evidence is small, short and mixed, and every positive single-ingredient sleep result used juice or concentrate. In two crossover pilots in older adults with insomnia, 240mL of juice twice daily for 2 weeks lowered insomnia severity and night-time waking but not time to fall asleep (Pigeon et al., 2010, n=15, funded in full by the juice maker CherryPharm), or added 84 minutes of total sleep time on polysomnography in 8 completers with no change in sleep onset or waking (Losso et al., 2018, funded by the Cherry Marketing Institute with NIH grants). In 20 healthy adults, concentrate increased time in bed, total sleep time and sleep efficiency over 7 days (Howatson et al., 2012), but a 30-day trial of juice and capsules in 44 healthy adults found no sleep difference (Hillman 2026). 500mg/day of tart cherry powder for 14 days had no effect on any sleep measure in 34 adults with poor sleep and overweight or obesity (Tucker 2024, funded by the Cherry Marketing Institute). No meta-analysis was found.

By The Nootropic Lab editorial teamUpdated Oct 19, 20268 min read✓ Fact-checked

Evidence reviewed: Oct 19, 2026

Mechanism of action

Tart cherry supplements come from Montmorency tart cherries (Prunus cerasus) as juice, concentrate or powder. Cherries contain melatonin, but only a trace: one analysis put a juice dose at about 0.135 micrograms, against the 0.5–5mg doses used for sleep, so any sleep effect is not established to come from dietary melatonin. A urinary melatonin breakdown product rose after tart cherry concentrate in one trial, but a higher urinary level is not itself a sleep benefit. A proposed alternative route, through tryptophan metabolism, comes from 8 trial completers and cell studies, not replicated human data.

Clinical evidence summary

Human effect matrix

Based on human clinical trials only. Animal and in-vitro data excluded.

Effect	Evidence	Magnitude	Studies	Notes
Sleep (Healthy Adults)	mixed	Small	2	Concentrate increased time in bed, total sleep time and efficiency over 7 days (Howatson 2012, n=20); a 30-day trial of juice and capsules in 44 healthy adults found no sleep difference (Hillman 2026).
Sleep in Older Adults with Insomnia	preliminary	Small	2	Two 2-week crossover pilots with juice: lower insomnia severity and night-time waking, but no change in sleep onset, total sleep time or efficiency (Pigeon 2010, n=15, maker-funded); 84 more minutes of total sleep time on polysomnography, but no change in sleep onset or waking (Losso 2018, 8 completers). Neither has been independently replicated.
Sleep from Powder or Capsules	preliminary	Negligible	2	500mg/day of whole Montmorency powder 1 hour before bed for 14 days had no effect on any sleep or inflammation measure in 34 adults with poor sleep and overweight or obesity (Tucker 2024); a capsule arm in a 30-day trial of 44 healthy adults also found no sleep difference (Hillman 2026).

Evidence key: Strong = multiple consistent RCTs · Moderate = smaller/fewer RCTs · Preliminary = early trials or small n · Mixed = conflicting results

Documented benefits

Lower insomnia severity and less night-time waking in older adults with insomnia (one 2-week crossover pilot with juice, maker-funded)
Longer total sleep time on polysomnography in older adults with insomnia (one pilot, 8 completers, juice)
Longer sleep time and higher sleep efficiency in healthy adults over 7 days (one trial with concentrate)

Side effects & cautions

No serious tart-cherry-specific adverse events were reported in the trial abstracts reviewed, but abstracts rarely report safety in detail and no sleep trial lasted longer than 30 days
Juice and concentrate carry sugar and calories, which capsules avoid
In an insomnia trial that screened with polysomnography, 3 of 11 people randomised had sleep apnoea and were excluded and referred, so poor sleep can reflect an untreated sleep disorder

How to take

DosagePositive sleep trials used juice (240mL twice daily) or concentrate. No trial has shown a sleep benefit from powder or capsules; 500mg/day of powder was tested and had no effect

TimingIn one positive juice trial, one serving in the morning and one 1–2 hours before bed; the powder trial gave capsules 1 hour before bed.

With foodThe trials set no rule. Juice and concentrate add sugar and calories.

FormsJuice, concentrate or powder capsules, usually from Montmorency tart cherries. All positive single-ingredient sleep trials used juice or concentrate; the two trials with a powder or capsule arm found no benefit, and no study has shown that a powder equals a given amount of juice.

Stacking recommendations

Ingredients that pair well with Tart Cherry (Montmorency) and why.

Magnesium

Both were in a 3-day blend trial of 16 adults (with tryptophan, glycine and L-theanine) that shortened sleep onset (Langan-Evans 2023); the trial cannot isolate either ingredient, and we cite no trial of the pair alone.

L-Tryptophan

Both were in the same 3-day, 16-person blend trial (Langan-Evans 2023); we cite no trial of the pair alone.

L-Theanine

L-theanine was also in that blend trial; we cite no trial of the pair alone.

Frequently asked questions

Does tart cherry work because it contains melatonin?

Unlikely. One analysis found about 0.135 micrograms of melatonin in a juice dose, versus the 0.5–5mg doses used for sleep. A urinary melatonin breakdown product rose after tart cherry concentrate in one trial, but a higher urinary level is not itself a sleep benefit.

Are tart cherry capsules as good as the juice?

That has not been shown. All positive single-ingredient sleep trials used juice or concentrate, and the two trials that tested powder or capsules found no sleep benefit, including 500mg/day for 14 days. The authors of that trial said 500mg of powder matches 2oz of concentrate in anthocyanin and polyphenol content, but that is their own statement, not a tested equivalence.

Who funded the research?

Cherry industry bodies funded much of it: the juice maker CherryPharm funded one of the two insomnia pilots in full, and the Cherry Marketing Institute funded the other (alongside NIH grants) and the 500mg powder trial that found no effect. The funding of the positive 7-day trial in healthy adults could not be checked because the paper is paywalled.

Is tart cherry safe?

No serious tart-cherry-specific adverse events were reported in the trial abstracts reviewed, though abstracts rarely report safety in detail and no sleep trial lasted longer than 30 days. Juice and concentrate add sugar and calories. In one insomnia trial, 3 of 11 participants had sleep apnoea, so poor sleep can reflect an untreated sleep disorder.