Supplement

Tart cherry

Antioxidant · Prunus cerasus, Montmorency cherry, Balaton, tart cherry juice, tart cherry concentrate, Morello cherry

Tart cherry juice is popular in endurance sports as a recovery drink and is also regarded as a natural sleep aid. For faster recovery of muscle strength, there is now a meta-analysis of 19 studies. For sleep and uric acid, the data are smaller and more mixed.

In short

Tart cherry juice or concentrate helps muscle strength recover faster after hard exercise and lowers the inflammatory marker CRP, according to a meta-analysis of 19 studies in athletes. Another meta-analysis found a small advantage in endurance performance. For sleep, concentrate extended sleep time in healthy people; for insomnia there are only small pilot studies, and a capsule study showed no effect. In gout, concentrate did not lower uric acid in a controlled study. Studies mostly used 30 mL of concentrate twice daily or 240 mL of juice twice daily.

What it is

Tart cherries, botanically Prunus cerasus, are the small, sour cherries that also include the Morello cherry well known in Germany. In research the Montmorency variety dominates, with Balaton also appearing. Juice, thickened concentrate diluted with water, and powder in capsules are used.

Tart cherries are rich in anthocyanins, the red plant pigments. In one analysis, 100 g of Balaton cherries provided 21 and 16.5 mg of the two main anthocyanins, Montmorency 11 and 5 mg. They also contain melatonin: Montmorency cherries came to 13.46 ng per gram, Balaton to 2.06 ng per gram.

How it is supposed to work

For recovery, the anthocyanins are the focus. In laboratory experiments they inhibited the enzymes COX-1 and COX-2, which painkillers such as ibuprofen also target, and they acted as antioxidants. In humans, it was shown that after concentrate, phenolic acids such as protocatechuic acid rise in the blood, at the same time as a reduction in blood pressure. This suggests that the active compounds are actually absorbed and have an effect.

Important for the assessment: most studies were conducted with Montmorency concentrate or juice, not with capsules. The positive recovery data come predominantly from protocols in which intake began a few days before the exercise and continued for up to two days afterwards. Anyone wanting to transfer the results to their own everyday life should therefore pay attention to form, variety and time period. A single glass after training is something different from what was studied.

For sleep there are two explanations. After 7 days of concentrate, the amount of melatonin, the sleep hormone that is also contained in the cherries themselves, rose in the urine of healthy people. A second trail leads via the amino acid tryptophan: a constituent of the juice inhibited the enzyme IDO, which breaks down tryptophan, in a cell experiment, and in a pilot study the kynurenine-tryptophan ratio in the blood fell. More tryptophan means more raw material for serotonin and melatonin.

What is well supported

The data on recovery after muscle-damaging exercise are the strongest. The 2026 meta-analysis by Daab and colleagues pooled 19 studies with trained athletes. With tart cherry juice, maximal strength recovered better at all time points, after 24 hours with an effect size of 1.12 and after 48 hours of 1.29. Jump height was better after 48 hours, and the inflammatory marker CRP was lower for up to 48 hours. The early studies already showed the pattern: in 14 students, strength loss after eccentric training averaged 22 percent under placebo and only 4 percent under cherry juice. In 20 marathon runners, strength returned faster, and IL-6, CRP and uric acid stayed lower. For endurance performance, a meta-analysis of 10 studies found a small but consistent advantage with a standardized difference of 0.36 and without heterogeneity. For sleep, concentrate extended total sleep time and sleep efficiency after 7 days in a double-blind study with 20 healthy people, measured with motion sensors.

What the studies show

Meta-analysis on recovery

Daab and colleagues analyzed 19 studies with trained athletes who received tart cherry juice or placebo after muscle-damaging exercise. Strength recovered considerably better, and CRP fell for up to 48 hours. There was no established effect on muscle soreness, creatine kinase and IL-6. Heterogeneity was high, individual studies carried part of the significant results, and the authors rate the certainty of evidence as very low to moderate.

Cherry juice in insomnia

Losso and colleagues gave people over 50 with sleep disorders 240 mL of cherry juice or placebo twice daily for 2 weeks each, separated by a 2-week break. Of 11 randomized participants, 3 had sleep apnea and were excluded. In the remaining 8, sleep time in the sleep laboratory rose by 84 minutes. Other questionnaires showed no difference. A larger study is still pending.

Uric acid in gout

Stamp and colleagues gave 50 people with gout placebo or 7.5 to 30 ml of tart cherry concentrate twice daily for 28 days. No dose changed uric acid in the blood, excretion in the urine or the number of gout attacks. Half of the participants were taking allopurinol; that did not change the result either.

Where the data stop

For muscle soreness itself and for creatine kinase, the large meta-analysis found no established effect, and in a direct comparison with a sports drink, cherry juice gave 12 cyclists no advantage. The sleep data are small and inconsistent. In older people with insomnia, the juice was better than placebo only for wake time during the night and for severity, not for sleep onset time or total sleep. In a study with 34 overweight people with sleep problems, 500 mg capsules over 14 days had no effect at all. A 2025 systematic review describes the evidence as limited and heterogeneous. The melatonin content of the cherries is in the nanogram-per-gram range; whether it alone explains the sleep effect is open. In gout, the best-known finding, 35 percent fewer attacks after eating cherries, rests on an observational study with 633 affected people. The controlled study found no reduction in uric acid, and a meta-analysis of 4 studies only a small effect. A 2026 crossover study showed that uric acid fluctuates over the course of the day anyway and that earlier acute findings without a control group may partly be due to this. For blood pressure, the systolic value fell by up to 7 mmHg after a single dose in 15 men, but over 3 months there was no effect in 50 adults.

Status, approval and legal

Tart cherries are conventional fruit; juice, concentrate and powder are freely available as foods and food supplements and are not a novel food. There are no official reference values or maximum amounts, because it is not a nutrient. Health-related advertising is only permitted in the EU with authorized claims, and statements on the prevention or treatment of diseases such as gout are fundamentally prohibited for foods. The studies mostly used 30 mL of concentrate twice daily, 240 mL of juice twice daily or 60 mL of concentrate as a single dose, usually a few days before and up to 48 hours after exercise.

Safety

Tart cherry concentrate was well tolerated in the studies. In a study with 50 middle-aged adults over 3 months with 30 mL twice daily, there were no adverse effects on blood sugar, insulin or blood lipids. In the gout study, of 24 adverse events only one, elevated blood sugar, was possibly attributed to the concentrate. Juice and concentrate contain fruit sugar, which counts in diabetes. The COX inhibition by the anthocyanins has so far only been shown in laboratory experiments; clinical interactions with anticoagulants have not been described. Anyone with gout should not replace urate-lowering therapy with cherry juice. In the observational study, the association with fewer attacks was strongest precisely in combination with allopurinol.

BK-Score Supported, with caveats

Human evidence		6
Mechanism		5
Safety data		6
Hype gap		5
Track record of use		8

For recovery, there is a meta-analysis of 19 studies: maximal strength recovered better after 24 h (effect size 1.12) and 48 h (1.29), CRP fell for up to 48 h, muscle soreness and CK remained unchanged; the certainty of evidence is very low to moderate with high heterogeneity (Daab 2026). For endurance performance, Gao and Chilibeck 2020 found a small, consistent advantage in 10 RCTs (SMD 0.36). For sleep, melatonin and sleep time rose in 20 healthy people (Howatson 2012); for insomnia there are only pilot studies with 15 and 8 evaluable participants respectively, and 500 mg capsules had no effect in 34 overweight people (Tucker 2024). In gout, the RCT with 50 patients missed any reduction in uric acid (Stamp 2020); the meta-analysis of 4 RCTs shows only SMD -0.22. Mechanistically, phenolic acids in the blood and melatonin in the urine have been measured in humans; the COX inhibition comes from the laboratory. Over 3 months with 30 mL twice daily, the concentrate had no adverse effects (Kimble 2021, n = 50).

The score rates the state of knowledge, not the substance. “Safety data 9” means well studied – not harmless.
Subjective assessment by Biohacking Kompakt based on published scoring rules – not a scientific rating and not a medical recommendation. Rules and all ratings (German)

Frequently asked questions about tart cherry

Does tart cherry juice help against muscle soreness?

Above all, it helps strength recover faster and lowers the inflammatory marker CRP. On the perception of pain itself, a meta-analysis of 19 studies found no established effect. Individual studies saw less pain.

Does tart cherry juice make you tired or help you fall asleep?

In healthy people, concentrate extended sleep time after 7 days; for insomnia there are only small pilot studies. Sleep onset time did not improve compared with placebo in the study of older people. A study with capsules showed no effect.

How much melatonin is in tart cherries?

In one analysis, Montmorency cherries contained 13.46 ng per gram, Balaton 2.06 ng per gram. That is in the nanogram range. After 7 days of concentrate, melatonin in the urine nevertheless rose measurably.

Does tart cherry juice lower uric acid in gout?

Not in a controlled study with 50 gout patients over 28 days. A meta-analysis of 4 studies found only a small effect. An observational study linked cherries with fewer attacks, but that does not prove an effect.

When should you drink tart cherry juice before a competition?

In the studies, intake usually began a few days before the exercise and continued for up to 48 hours afterwards, for example 5 days before a marathon. The meta-analysis on endurance covered intake from 7 days to 1.5 hours before the test.

Is concentrate better than capsules?

Most positive studies used juice or concentrate. A study with 500 mg capsules found no effect on sleep. There is no direct comparison of the forms.

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Information only, not medical advice and not a usage or dosage recommendation. Prescription-only and unapproved substances belong in the hands of a physician. Last updated: 2026-09-27.