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Which fruit is the most diuretic?


Diuretics are substances that increase the production of urine. Some foods and drinks contain natural diuretics that can help flush extra fluid and salt from the body. This may benefit people looking to lower blood pressure, reduce bloating, or lose weight due to water weight. When comparing common fruits, some stand out as more diuretic than others. In this article, we’ll look at which fruits are the most effective natural diuretics based on their nutrient content and scientific research.

What Makes a Food Diuretic?

Certain nutrients and compounds in foods can have a diuretic effect in the body. Here are some of the main characteristics that make fruits and other foods natural diuretics:

  • High water content – Fruits and veggies with high water content increase urine output by adding fluid to the body. Examples include watermelon, strawberries, and cucumbers.
  • Potassium – Foods high in potassium can act as mild diuretics by helping the kidneys flush out more sodium through urine. Bananas, avocados, and apricots are high in potassium.
  • Magnesium – Magnesium has natural diuretic effects and foods high in this mineral may promote more frequent urination. Spinach, Swiss chard, and blackberries contain lots of magnesium.
  • Dandelion – This herb contains compounds like taraxasterol and caffeic acid that have diuretic effects. It’s sometimes used in natural diuretic supplements.
  • Caffeine – Beverages like coffee, tea, and soda contain caffeine which acts as a mild diuretic.

So when looking for fruits that will make you pee more, opt for those that are hydrating and contain higher amounts of diuretic minerals and compounds.

Ranking the Most Diuretic Fruits

To provide a comparison, here is a ranking of some of the most diuretic fruits:

Fruit Diuretic Power
Watermelon Very Strong
Grapefruit Strong
Oranges Strong
Strawberries Moderate
Apples Mild
Blueberries Mild

As you can see, watermelon ranks as the most powerfully diuretic fruit with its extremely high water content – about 92% by weight. Citrus fruits like grapefruit and oranges also have a strong diuretic effect due to their high water and potassium levels. Berries rank more mildly, but strawberries, blueberries, blackberries, and cranberries all contain water, potassium, magnesium, and other diuretic compounds. Apples are hydrating yet lower in the most powerful diuretic minerals.

Now let’s take a closer look at what makes the top fruits so effective when it comes to increasing urine output.


Watermelon is by far the most diuretic fruit.

One 2-cup serving of watermelon contains:

  • 1.4 grams potassium
  • 140 grams water

The extremely high water content (over 90% by weight) combined with potassium levels make watermelon ideal for flushing out excess fluids and electrolytes. Studies also indicate the citrulline in watermelon may have a diuretic effect by increasing urine volume and frequency.

According to one study, eating about 2 cups of watermelon for a week increased urine output by 22–26% in participants. The diuretic effect was attributed to watermelon’s potassium and high water content.

So for a super hydrating snack that will send you running to the bathroom, watermelon is likely your best bet. The high water content causes a very prompt, powerful diuretic effect.


Like other citrus fruits, grapefruit is high in water content and potassium, making it an effective diuretic.

One whole grapefruit contains:

  • 354 grams water
  • 288 milligrams potassium

Research indicates grapefruit is one of the most potent fruits for increasing urine output. One study found drinking 24 ounces of grapefruit juice increased urinary output by 25% compared to drinking water alone. The researchers concluded grapefruit juice has significant diuretic effects.

The flavonoid naringenin in grapefruit may also have diuretic effects by increasing blood flow within the kidneys to improve fluid filtration and excretion.

So if you’re looking for a fruit that’s as effective as taking a water pill, grapefruit is one of your best options. Enjoy it juiced or eat the segments along with the juice for optimal diuretic benefits.


Oranges are another great citrus fruit option if you want to increase your urinary output.

A large orange contains:

  • 237 grams water
  • 181 milligrams potassium

The water and potassium content make oranges an effective diuretic. One study found people who ate 1 orange per day for 4 weeks had increased urinary output. The researchers attributed this to the potassium and flavonoids in oranges.

Oranges also contain the diuretic nutrient magnesium, with one large orange providing about 5% of the RDI.

Compared to grapefruit, oranges may have slightly less diuretic potential. But they are still an excellent choice, especially if you find grapefruit too sour or acidic.


In addition to their numerous health benefits, strawberries are a moderately strong diuretic thanks to their water and nutrient content.

Here are the main diuretic nutrients in 1 cup (about 8 medium) strawberries:

  • 170 grams water
  • 278 milligrams potassium
  • 22 milligrams magnesium
  • 31 milligrams vitamin C

Strawberries contain a lower water content than watermelon and citrus fruits. Yet they still provide a decent amount of hydration along with potassium, magnesium, and antioxidants.

Research on strawberries’ effects on urine output is limited. But their nutrient profile and hydrating quality strongly suggest strawberries can help increase urine production and frequency.

Plus, strawberries make for a tasty diuretic snack or smoothie ingredient. Freeze fresh strawberries during the summer to enjoy their diuretic benefits year-round.


Apples have a high water content but are lower in the most potent diuretic nutrients like potassium and magnesium. But they still make a good diuretic snack due to their water content.

One medium apple provides about:

  • 182 grams water
  • 195 milligrams potassium
  • 7 milligrams magnesium

Research does suggest apples have mild diuretic effects. One study found giving rats apple juice concentrate increased urine output and electrolyte excretion compared to a control group. The diuretic effect was attributed to the high Malic acid content in apples.

So while apples may not be the strongest diuretic fruit, they do help flush fluids thanks to their high water content and Malic acid. Apples make a great lower-sugar fruit option for those looking for a mild diuretic effect.

Other Diuretic Fruits

In addition to the top fruits already covered, here are a few other fruits with mild diuretic effects:

  • Cranberries – Contain organic acids that increase urine pH and output.
  • Tomatoes – Water content and potassium support diuresis.
  • Blackberries – Provide water, potassium, and the diuretic nutrient magnesium.
  • Kiwis – Watery and contain potassium; may have mild diuretic effects.
  • Grapes – Moderately hydrating and contain potassium.
  • Plums – May act as a mild diuretic due to sorbitol content.
  • Pineapple – Contains potassium, may promote increased urine production.

So while not as powerful as watermelon and citrus fruits, these mild diuretic fruits can still help flush excess fluids and sodium from the body. Their water content and assortment of electrolytes and nutrients make them useful additions to a diet aimed at stimulating urination.

Super Diuretic Fruit Combinations

For an even stronger diuretic impact, you can combine the most powerful fruits together into diuretic-packed smoothies, juices, and fruit salads.

Here are a few super diuretic fruit combinations:

  • Watermelon grapefruit juice – Blend watermelon and grapefruit segments and juice for a powerful hydrating and electrolyte-flushing drink.
  • Citrus berry smoothie – Mix oranges, strawberries, blackberries, and cranberry juice for a nutrient-dense blend.
  • Tropical fruit salad – Watermelon, pineapple, grapes, and kiwi make a hydrating post-dinner dessert.
  • Melon berry snack – Enjoy watermelon with a handful of fresh strawberries and blueberries.

Combining the fruits with the strongest diuretic effects creates snacks and drinks that can rapidly flush fluids and salt while providing antioxidants and hydration. Choose fruits you enjoy eating raw or blend them together for refreshing diuretic beverages.

Side Effects of Diuretic Fruits

While using diuretic fruits can benefit health in many ways, there are some potential side effects to keep in mind:

  • May disrupt sleep – Consuming diuretic fruits too close to bedtime can cause waking up to pee.
  • Blood sugar spikes – Fruits high in sugar like grapes may spike blood sugar in diabetics.
  • Electrolyte imbalance – Excessive water and electrolyte loss can cause low sodium and potassium.
  • Dehydration – Increasing urine output without increasing hydration can lead to dehydration.
  • Medication interactions – Diuretic fruits may interact with water pills and other diuretic medications.

To avoid issues, don’t overdo diuretic fruits, stay hydrated, moderate sugar intake, and monitor nutrient levels if also taking diuretic medications. Speak with a doctor if you have any concerns.

When to Avoid Diuretic Fruits

There are some circumstances where avoiding too much diuretic fruit is recommended:

  • Taking prescription diuretics – Can compound effects and lead to dehydration or electrolyte imbalances.
  • Active infections – Increased urination can worsen dehydration and reduce antibiotic concentration in urine.
  • Pregnancy – Some diuretic effects may be harmful; use fruits in moderation.
  • Elderly – Older adults have increased fluid needs so excess diuresis can be detrimental.

If you have a medical condition that requires limiting fluid loss, be cautious with eating large amounts of the most powerfully diuretic fruits. Prioritize staying hydrated and speak to your doctor about safe ways to use fruit as natural diuretics.


Watermelon, grapefruit, oranges, and strawberries are among the most effective diuretic fruits based on their high water content and diuretic nutrients like potassium and magnesium. While fruits like apples and berries have milder effects, they can still help flush extra fluids and reduce bloating when used properly.

Pay attention to your body’s cues and adjust your intake of diuretic fruits as needed. Combining these fruits can ramp up their diuretic power even more. But don’t overdo it to avoid dehydration or electrolyte imbalances. For people with certain medical conditions like kidney disease, strict limits on potassium may also apply.

Overall, fruits are a tasty way to help balance fluid levels and provide key nutrients in addition to their diuretic effects. Just be mindful of your individual health status and needs when harnessing the pee-inducing power of these fruits!