95-Year-Old Patient Develops Reversible Kidney Injury From Daily Whole Cherry Consumption
A 95-year-old woman experienced a sudden decline in kidney function after eating 15 to 20 fresh or frozen whole cherries nightly for two weeks as a natural sleep aid, Cureus reported. Medical evaluations linked the daily fruit intake to acute kidney injury superimposed on her pre-existing stage 3A chronic kidney disease. When she stopped eating the cherries, her lab results returned to normal within a month.
How Whole Cherries Triggered Acute Kidney Injury
Researchers applied the Naranjo Adverse Drug Reaction Probability Scale to the patient’s case, yielding a score of 7 out of 13, which classifies the reaction as probable. Sweet and tart cherries contain high levels of anthocyanins, polyphenols, and melatonin. While these compounds provide anti-inflammatory and sleep-promoting benefits for many individuals, they also demonstrate cyclooxygenase-inhibitory activity in laboratory evaluations.
Inhibition of COX enzymes reduces the production of vasodilatory renal prostaglandins like prostaglandin E2. These prostaglandins normally help preserve blood flow to the kidneys when renal perfusion is already compromised. Advanced age and chronic kidney disease reduce a patient’s renal reserve, leaving fewer nephrons to handle the sudden hemodynamic stress caused by this drop in protective vasodilation.
Comparing Whole Fruit and Concentrated Juices
Previous medical literature documented acute kidney injury cases linked to concentrated cherry juice products in older adults with underlying kidney disease. However, those earlier cases involved confounding variables such as concurrent prescription medications like lisinopril and furosemide that doctors temporarily withheld during treatment.
In the 95-year-old patient’s case, her medication regimen—including a stable daily dose of lisinopril 20 mg—remained entirely unchanged throughout the incident. The complete absence of medication changes, combined with the clear timeline of recovery after she stopped eating whole cherries, isolates the fruit as the primary trigger.
Recovery Timeline and Lab Results
Before starting the nightly cherry routine, the patient maintained a baseline serum creatinine level of 0.8 mg/dL and an estimated glomerular filtration rate of 55.3 mL/min/1.73 m². After two weeks of consuming whole cherries, routine lab work revealed her serum creatinine jumped to 1.3 mg/dL, while her eGFR dropped sharply to 35.2 mL/min/1.73 m².
Physicians advised the patient to discontinue cherry consumption immediately without altering any other part of her medical care. Repeat laboratory testing conducted one month later confirmed that her serum creatinine recovered to 0.9 mg/dL and her eGFR improved to 52.31 mL/min/1.73 m², returning safely within her established baseline range.
Frequently Asked Questions About Cherry-Associated Kidney Risks
Can healthy individuals safely eat cherries without risking kidney damage?
Yes, healthy individuals with normal renal function possess adequate physiological reserve to process the COX-inhibitory compounds found in cherries without adverse renal effects. The documented risks specifically affect vulnerable populations, such as older adults with pre-existing chronic kidney disease.
What symptoms indicated that the patient was experiencing acute kidney injury?
The patient presented for a routine follow-up appointment completely asymptomatic and without any physical complaints, lower urinary tract symptoms, or signs of volume depletion. The acute kidney injury was discovered entirely through routine blood tests that showed an unexpected rise in serum creatinine.
Why did the patient start eating cherries daily?
She began consuming 15 to 20 fresh or frozen whole cherries every night after reading online claims that the fruit could serve as a natural sleep aid due to its melatonin content.
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