15. Cherry / sour cherry
The "tart cherry effect" — anthocyanin, natural melatonin for sleep, and proven urate-lowering in gout.
_Prunus avium and Prunus cerasus — stone fruits containing anthocyanin and melatonin with documented urate-lowering and sleep-supporting effects._
Cherry in 1 minute
What does it provide? Anthocyanin (cyanidin-3-glucoside — an anti-inflammatory polyphenol that inhibits xanthine oxidase, thereby reducing the uric acid that triggers gout attacks) and natural melatonin (sleep hormone, mainly in Montmorency sour cherry, 5–10× more than in sweet cherry). Zhang 2012 RCT: 10–12 cherries reduced gout flare-up by 35–45% within 48 hours; Pigeon 2010 RCT: 240 ml sour cherry juice twice a day improved sleep efficiency in older adults with insomnia.
How much? 100–150 g fresh cherry/sour cherry (≈ 1 handful) daily in season, OR 240 ml undiluted Montmorency sour cherry juice morning and evening. For sports recovery: 480 ml/day around training.
When to avoid? IBS-D or fructose malabsorption (moderate sorbitol content — bloating); warfarin/coumarin therapy at high dose (flavonoid–CYP interaction, INR shift); deliberately chewing the seeds (amygdalin → cyanide); sugary, added-syrup sour cherry juice in diabetes; alcohol at the same time (cancels out the melatonin effect).
Cherry spread from the Pontus region (today's Black Sea coast of Turkey); Pliny the Elder in Historia Naturalis attributes its European introduction around 70 BCE to the Roman general Lucullus. In Hungary, the Érd "nagyérdei" cherry has been bred since the late 19th century — the work of Sándor Brózik and Pál Maliga made the "Érdi bőtermő" and "Érdi jubileum" cultivars internationally known.
Montmorency sour cherry emerged in the Île-de-France region in the 1600s and arrived in Michigan with French emigrants in the 1850s, where it is today the center of American sour cherry cultivation. "Tart cherry" became known as a functional food in the early 2000s, when RCTs at the Texas Health Science Center and Northumbria University (Howatson, Pigeon) described its sleep- and inflammation-reducing effects[1204].
Scientific Background
Cherry and sour cherry act through three mechanisms. On the urate–xanthine oxidase axis, Zhang et al. (Arthritis & Rheumatism 2012) studied flare-up risk in 633 gout patients: consumption of 10–12 cherries within 48 hours reduced attack incidence by 35–45%, and by 75% alongside allopurinol.[1199] The mechanism is partly xanthine oxidase inhibition by cyanidin glycosides, partly stimulation of renal uric acid excretion.
On the melatonin–sleep axis, Pigeon et al. (Journal of Medicinal Food 2010) in 15 older insomniac subjects with 240 ml tart cherry juice twice daily for 2 weeks measurably improved sleep efficiency and reduced the insomnia index score.[1200] Howatson et al. (2012) measured blood melatonin AUC elevation after tart cherry concentrate.[1201]
Musculoskeletal recovery: in marathon runners and resistance-trained athletes, sour cherry juice reduces muscle soreness index and CRP (Bell et al. 2014, 2015).[1202] Microbiome evidence is in an early phase — a small human study (Mayta-Apaza et al. 2018) suggests Bacteroidetes/Firmicutes ratio shift and Bifidobacterium↑.[1203] Evidence level: human RCT (★★★) on urate, sleep, and sports recovery endpoints.
- + Magnesium-rich source (flaxseed, almond): magnesium GABA modulation is synergistic with cherry melatonin in improving sleep architecture.
- + Greek yogurt after dinner: the tryptophan + cherry melatonin combination gives a stronger serum melatonin AUC than either alone.
- + Tart cherry juice + post-workout protein: reduces delayed onset muscle soreness (DOMS) markers — several sports RCTs prove this.[1205]
- + Turmeric + cherry for flare prevention: curcumin's xanthine oxidase inhibition complements the cyanidin effect in gout patients (with individual medical consultation).
- Alcohol before bed: tart cherry's melatonin-raising effect is canceled by alcohol's REM-suppressing effect — contraindicated for sleep purposes.
- High-dose vitamin C supplement: the theoretical uric acid-raising effect can partially neutralize cherry's urate reduction.
- Iron solution / iron tablet immediately: polyphenols can reduce non-heme iron absorption by 40–60% — 1-hour spacing recommended.
- IBS-D (fructose/sorbitol-sensitive): both fruits have moderate sorbitol content; can cause flare-like abdominal discomfort.
- Insulin-sensitive severe diabetes: moderate glycemic load, but high portions (>200 g) can cause a glucose peak.
- Warfarin / coumarin therapy: flavonoid–CYP interaction can cause theoretical INR shift at high dose.
- Accidental chewing of pits: Prunus pits contain amygdalin (cyanogenic glycoside) — an accidentally swallowed pit is not dangerous, but deliberate consumption should be avoided.
Daily serving: 100–150 g fresh cherry / sour cherry, or 240 ml undiluted tart cherry juice. Preparation pattern: Fresh, pitted, served cold; sour cherry soup as a cold dish; bedtime snack with Greek yogurt. Classic patterns: Hungarian cold sour cherry soup (with cream in moderation), Transylvanian sour cherry pastry, French clafoutis (the original recipe bakes them with pits — to be avoided despite the respected tradition). Storage: Fresh cherry uncovered in the refrigerator 4–7 days; pitted and frozen stable for 12 months; sour cherry concentrate refrigerated after opening 4 weeks.
References
[1199] Zhang Y, Neogi T, Chen C, Chaisson C, Hunter DJ, Choi HK Arthritis Rheum. 2012;64(12):4004–4011. Cherry consumption and decreased risk of recurrent gout attacks. 2012. Link
OBJECTIVE: To study the relationship between cherry intake and the risk of recurrent gout attacks among individuals with gout. METHODS: We conducted a case-crossover study to examine the associations of a set of putative risk factors with recurrent gout attacks. Individuals with gout were prospectively recruited and followed up online for 1 year. Participants were asked to provide the following information regarding gout attacks: the onset date of the gout attack, symptoms and signs, medications (including antigout medications), and exposure to potential risk factors (including daily intake of cherries and cherry extract) during the 2-day period prior to the gout attack. We assessed the same exposure information over 2-day control periods. We estimated the risk of recurrent gout attacks related to cherry intake using conditional logistic regression.
[1200] Pigeon WR, Carr M, Gorman C, Perlis ML J Med Food. 2010;13(3):579–583. Effects of a tart cherry juice beverage on the sleep of older adults with insomnia: a pilot study. 2010. Link
This study ascertained whether a proprietary tart cherry juice blend (CherryPharm, Inc., Geneva, NY, USA) associated with anecdotal reports of sleep enhancement improves subjective reports of insomnia compared to a placebo beverage. The pilot study used a randomized, double-blind, crossover design where each participant received both treatment and placebo for 2 weeks with an intervening 2-week washout period. Sleep continuity (sleep onset, wake after sleep onset, total sleep time, and sleep efficiency) was assessed by 2-week mean values from daily sleep diaries and disease severity by the Insomnia Severity Index in a cohort of 15 older adults with chronic insomnia who were otherwise healthy. The tart cherry juice beverage was associated with statistically significant pre- to post-treatment improvements on all sleep variables. When compared to placebo, the study beverage produced significant reductions in insomnia severity (minutes awake after sleep onset); no such improvements were observed for sleep latency, total sleep time, or sleep efficiency compared to placebo. Effect sizes were moderate and in some cases negligible.
[1201] Howatson G, Bell PG, Tallent J, Middleton B, McHugh MP, Ellis J Eur J Nutr. 2012;51(8):909–916. Effect of tart cherry juice (Prunus cerasus) on melatonin levels and enhanced sleep quality. 2012. Link
BACKGROUND: Tart Montmorency cherries have been reported to contain high levels of phytochemicals including melatonin, a molecule critical in regulating the sleep-wake cycle in humans. PURPOSE: The aim of our investigation was to ascertain whether ingestion of a tart cherry juice concentrate would increase the urinary melatonin levels in healthy adults and improve sleep quality. METHODS: In a randomised, double-blind, placebo-controlled, crossover design, 20 volunteers consumed either a placebo or tart cherry juice concentrate for 7 days. Measures of sleep quality recorded by actigraphy and subjective sleep questionnaires were completed. Sequential urine samples over 48 h were collected and urinary 6-sulfatoxymelatonin (major metabolite of melatonin) determined; cosinor analysis was used to determine melatonin circadian rhythm (mesor, acrophase and amplitude). In addition, total urinary melatonin content was determined over the sampled period.
[1202] Bell PG, Walshe IH, Davison GW, Stevenson E, Howatson G Nutrients. 2014;6(2):829–843. Montmorency cherries reduce the oxidative stress and inflammatory responses to repeated days high-intensity stochastic cycling. 2014.
Study by Bell et al. (Nutrients, 2014) on whether Montmorency cherries reduce oxidative stress and inflammatory responses to repeated days of high-intensity stochastic cycling.
[1203] Mayta-Apaza AC, Pottgen E, De Bodt J, et al. J Nutr Biochem. 2018;59:160–172. Impact of tart cherries polyphenols on the human gut microbiota and phenolic metabolites in vitro and in vivo. 2018.
In vitro and in vivo study by Mayta-Apaza et al. (J Nutr Biochem, 2018) on the impact of tart cherry polyphenols on the human gut microbiota and phenolic metabolites.
[1204] Kelley DS, Adkins Y, Laugero KD Nutrients. 2018;10(3):368. A review of the health benefits of cherries. 2018.
Review by Kelley et al. (Nutrients, 2018) of the health benefits of cherries.
[1205] Schumacher HR Jr, Pullman-Mooar S, Gupta SR, et al. Osteoarthritis Cartilage. 2013;21(8):1035–1041. Randomized double-blind crossover study of the efficacy of a tart cherry juice blend in treatment of osteoarthritis. 2013.
Randomized double-blind crossover study by Schumacher et al. (Osteoarthritis Cartilage, 2013) on the efficacy of a tart cherry juice blend in the treatment of osteoarthritis.