If you’re referring to the viral advice “Do you urinate too much at night? Eat bananas this way,” there isn’t good evidence that a particular way of eating bananas will reliably stop nighttime urination.
🍌 What you should know
Waking more than once a night to urinate is called nocturia. It can have many causes, including drinking fluids late, caffeine or alcohol, an overactive bladder, diabetes, certain medicines, sleep apnea, and—particularly in men—an enlarged prostate.
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Mayo Clinic
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Bananas are rich in potassium, but there isn’t established evidence that eating a banana at a particular time or prepared in a particular way treats nocturia. In fact, people with advanced kidney disease may need to limit bananas because of their potassium content.
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NIDDK
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Better-supported things to try
Get most of your fluids earlier in the day.
Reduce fluids in the few hours before bed, while still avoiding dehydration.
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Mayo Clinic
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Limit caffeine and alcohol, especially in the evening.
Empty your bladder before going to bed.
If you have leg swelling, discuss it with your clinician; the timing of fluid movement back into circulation can contribute to nighttime urination.
If you’re regularly waking two or more times, or the problem is new or worsening, it’s worth discussing with a healthcare professional rather than trying to treat it with bananas alone.
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Mayo Clinic
Especially seek medical advice if frequent nighttime urination comes with excessive thirst, painful urination, blood in the urine, fever, difficulty emptying your bladder, or significant daytime fatigue.
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Mayo Clinic
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