Tart Cherry

What it is

Tart cherry (Prunus cerasus), most commonly the Montmorency variety, is a sour fruit rich in polyphenols, particularly anthocyanins, chlorogenic acid, and melatonin [1] [2]. In research, it is typically consumed as a tart cherry juice concentrate diluted in water, ready-to-drink 100% juice, or freeze-dried powdered capsules [1] [3] [4].

How it might work

Anthocyanins and other polyphenols in tart cherry are proposed to reduce oxidative damage and inhibit inflammatory enzymes such as cyclooxygenase [1] [5]. Proposed mechanisms for uric acid lowering include inhibition of xanthine oxidase and promotion of renal urate clearance [6] [5]. Tart cherry also contains small amounts of dietary melatonin, proposed to support the body's natural circadian rhythm [2].

What the research says

Muscle strength recovery. A 2021 meta-analysis of 14 studies found that tart cherry supplementation had a moderate beneficial effect on muscle strength recovery (effect size -0.78) and a small effect on muscle soreness (effect size -0.44) [7]. It also improved recovery of muscular power (effect size -0.53) and jump height (effect size -0.82) [7]. A 2026 meta-analysis of 19 trials in athletes confirmed faster recovery of maximal voluntary contraction across all tested time points up to 96 hours post-exercise, alongside lower C-reactive protein levels [8]. Individual randomized trials in weight training, marathon running, cycling, and soccer also demonstrated faster isometric strength recovery and attenuated inflammatory responses [9] [10] [1] [11] [12].

Serum uric acid. A 2026 meta-analysis of four randomized trials with 392 participants found a modest reduction in serum uric acid compared with control (standardized mean difference -0.22) [5]. In a randomized crossover trial of 26 overweight and obese adults, drinking 240 mL daily of tart cherry juice for four weeks reduced serum uric acid by 19.2% [3]. A 2021 trial in 48 adults observed a transient 8% drop in uric acid that was not maintained past 24 to 48 hours [4]. In 50 people with established gout, 28 days of tart cherry concentrate had no significant effect on serum uric acid or gout flare frequency [13]. In 282 men with gout starting febuxostat, adding a tart cherry citrate mixture reduced gout flares compared with sodium bicarbonate, though uric acid lowering was driven by febuxostat [14].

Sleep. In a randomized crossover trial of 20 healthy volunteers, tart cherry concentrate for seven days elevated urinary melatonin excretion and improved total sleep time and sleep efficiency [2]. A pilot crossover trial of 15 older adults with chronic insomnia found modest reductions in nighttime wakefulness [15].

Doses used in studies

Exercise recovery trials commonly use 30 mL (about 2 tablespoons) of Montmorency cherry juice concentrate diluted in water twice daily for four to seven days before and two to four days after strenuous exercise [1] [11] [12]. Other protocols used 240 mL to 355 mL of tart cherry juice twice daily [9] [10] [3]. Uric acid trials evaluated 240 mL daily of juice or 15 mL to 60 mL daily of concentrate for up to four weeks [3] [13]. Powdered extract capsules have been studied at 480 mg to 960 mg daily [4] [16].

Safety and interactions

• Side effects: Tart cherry juice and concentrate are generally well tolerated; mild gastrointestinal discomfort, loose stools, or abdominal fullness are the most common reported side effects, related to fruit sugars and sorbitol [13]. In a 28-day trial in 50 participants, adverse events were infrequent and did not differ significantly from placebo [13].
• Upper limits and toxicity: No official tolerable upper intake level has been established for tart cherry juice or Montmorency concentrate; trials using up to 60 mL of concentrate or 480 mL of juice daily have reported no severe toxicities [13] [4].
• Medicine interactions: No direct clinical pharmacokinetic drug interaction trials were identified; however, because tart cherry juice is a potassium-containing fruit beverage, caution is advised when taking potassium-sparing diuretics or renin-angiotensin inhibitors [13] [14].
• Pregnancy and breastfeeding: No clinical trials have evaluated the safety or efficacy of concentrated tart cherry products during pregnancy or breastfeeding, so pregnant and nursing individuals should consult a healthcare provider before using concentrated supplements [13].
• Conditions to watch: People with diabetes should account for the carbohydrate content of cherry juice, which may affect glycemic control [3] [13]. Individuals with severe kidney disease should monitor potassium intake from fruit juices [14].

Caveats and open questions

Most trials are small, with fewer than 30 participants per group, and study protocols vary widely in cherry formulations, doses, and timing [7] [8] [5]. In addition, several early trials received industry funding or involved authors with commercial ties to tart cherry products [9] [16]. Whether tart cherry provides meaningful long-term clinical protection against gout flares in patients not on urate-lowering drugs remains unconfirmed in large randomized trials [13] [5].