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Does Iced Tea Give You Kidney Stones

Your Physician Prescribes How Much

Can Iced Tea Cause Kidney Stones?

I will be offering as much variety as I can, and encouraging you to drink, but the volume you need comes from your physician. This applies especially to my two day long examples. I made them to provide very large amounts of fluids for those who need them. If your physician prescribes less, just scale my recommendations back. Under no circumstances should you follow a fluid prescription in this post unless it fits with your physicians specific recommendations for you.

The Solution: Which Teas Are Best For Kidneys

Not all teas are cause for concern when it comes to kidneys. There are plenty of tea types that havent been linked to kidney disease, and in fact may help improve kidney health! The key you may have learned by now is levels of caffeine and oxalates, and also other constituents like certain antioxidants which can actually be beneficial to kidney health.

Dont Underestimate Your Sweat

Saunas, hot yoga and heavy exercise may be good for your health, but they also may lead to kidney stones. Why? Loss of water through sweating whether due to these activities or just the heat of summerleads to less urine production. The more you sweat, the less you urinate, which allows for stone-causing minerals to settle and bond in the kidneys and urinary tract.

One of the best measures you can take to avoid kidney stones is to drink plenty of water, leading you to urinate a lot. So, be sure to keep well hydrated, especially when engaging in exercise or activities that cause a lot of sweating.

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What To Expect At Home

You visited your provider or the hospital because you have a kidney stone. You will need to take self-care steps. Which steps you take depend on the type of stone you have, but they may include:

  • Drinking extra water and other liquids
  • Eating more of some foods and cutting back on other foods
  • Taking medicines to help prevent stones
  • Taking medicines to help you pass a stone

You may be asked to try to catch your kidney stone. You can do this by collecting all of your urine and straining it. Your provider will tell you how to do this.

If youve ever had a run-in with kidney stones, then youve also had a run-in with a relative/neighbor/obnoxious over-sharer who has the home remedy that fixed them right up.

And while unsolicited after-dinner medical advice may sometimes sound reasonable, theres a lot you need to know about your own kidney stones before you start adjusting your diet based on Aunt Alices latest stone story.

You dont want calcium because thats what stones are made of, so ditch the milk.Oxalates are bad, so stop eating foods like chocolate, beer, soy, nuts, spinach and coffee.And if you feel a stone coming on, start drinking lots of cranberry juice to get rid of it.

Youve probably gathered lots of advice and home remedies in your battle against kidney stones . But many of grandmas homemade fixes may actually do more harm than good when it comes to the specific composition of your kidney stones and the reasons why you are forming them.

What Is The Relationship Between Green Tea And Kidney Stones

Does Iced Tea Cause Kidney Stones?

Green tea has actually been shown to reduce the risk of kidney stone formation in women by a respectable eight percent. In men, that risk reduction increases to 14 percent. While green tea still leads to an increase of oxalate in the blood, it adversely impacts crystal formation, which is the kidney stone.

How Does Green Tea Help Prevent Kidney Stones?

It is believed that the extract from green tea ends up adhering itself to the calcium oxalate as it is emitted. This impacts the way that the crystals are formed in comparison to other types of tea. In essence, the crystals formed from green tea do not clump together like they normally would.

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The Course Website And Blog For The Fall 2016 Instance Of Penn State’s Sc200 Course

Im an avid tea drinker. I love tea, especially green tea, and all of the benefits it can offer. For example, green tea improves health and promotes weight loss. And mint tea can help with stomach aches. One thing Im wondering is if tea can cause kidney stones. My friend posed this question to me a few weeks ago, and ever since then, that question has been swirling around my head especially if Im drinking a cup of tea.

According to, an article they published stated that drinking iced tea may cause kidney stones. The article notes that because tea consists of oxalates, kidney stones have an increased chance of forming in the kidneys. An oxalate is a common chemical that causes kidney stones to form. The article also points out that iced tea has a greater chance of creating kidney stones than hot tea. And while tea may contain oxalate, does correlation equal causation?

For example, while oxalates may be correlated with creating kidney stones, this does not necessarily mean it is the cause. Many other factors can attribute to causing kidney stones. These factors, confounding variables, could be the solution to this question of whether tea causes kidney stones or not. Some possible third variables may include genetics, gender, exercise, diet and age. And of course, chance could always be the answer to the hypothesis.

Unless youre Joey from Friends, and its an unbearable experience all around.

Why Drinking Too Much Iced Tea Caused This Mans Kidneys To Fail

Iced tea is delicious no one here is denying that. But like with most great things, too much of it can bring about dire consequences.

Such is the story of an Arkansas man who drank so much iced tea that it led him to develop kidney failure. Three Arkansas doctors described the case in a letter published by the New England Journal of Medicine this week.

The 56-year-old man showed up at the hospital in May 2014 with weakness, fatigue and body aches, along with high levels of creatinine, which is used as an indicator for kidney function.

Doctors asked: Do you have a history of kidney stones in your family? No.

What about kidney disease? No.

The questions continued, the doctors write, until eventually “the patient admitted to drinking sixteen 8-oz glasses of iced tea daily.”

Yeah, that’s a lot of iced tea. A gallon of it, actually.

Black tea is rich in the food compound oxalate, which had likely clogged the man’s kidneys and inflamed them, leading to renal failure and the need for dialysis.

“In this case there were oxalate crystals inside the kidney, and that generates an inflammatory reaction,” Umbar Ghaffar of the University of Arkansas for Medical Sciences told Reuters. “If that’s not resolved it will cause scarring and loss of the kidney tissue. So that’s what probably was happening in this patient.”

But at 16 cups of black iced tea a day, the Arkansas patient took in more than 1,500 milligrams of oxalate every day.

So, bottoms up — to a limit.

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Is Tea High In Oxalate

While tea is relatively high in oxalate compared to many foods, its important to remember that the serving size of tea is usually dozens or hundreds of times less than other foods.

According to several studies, heres how much soluble oxalate various types of tea leaves and tea liquid yield:

  • Black tea leaves: 4.61-5.11 milligrams of oxalate per gram of leaf
  • Black tea liquid: 4.41-4.92 milligrams of oxalate per cup
  • Chinese green tea liquid: 1.9 to 27.96 milligrams of oxalate
  • Chinese oolong tea liquid : 6.89 milligrams of oxalate per cup
  • Green tea powder or matcha: 12.6 milligrams of oxalate per 2-gram serving

Now, for comparison, here is the oxalate content of some common foods.

High oxalate foods that may increase the risk of kidney stones:

  • Purslane: 1294 mg oxalate per 100 grams fresh weight
  • Spinach: 970 mg oxalate per 100 grams fresh weight
  • Cocoa: 700 mg oxalate per 100 grams
  • Sorrel 500 mg oxalate per 100 grams fresh weight
  • Rhubarb: 260 mg oxalate per 100 grams fresh weight
  • Cashew: 231 mg oxalate per 100 grams

Medium- and low-risk foods with less oxalate:

  • Parsley: 170 mg oxalate per 100 grams fresh weight
  • Potato: 80 mg oxalate per 100 grams fresh weight
  • Cabbage: 60 mg oxalate per 100 grams fresh weight
  • Tomato: 20 mg oxalate per 100 grams fresh weight
  • Apple: 15 mg oxalate per 100 grams fresh weight
  • Lettuce: 12 mg oxalate per 100 grams fresh weight

Is There A Link Between Iced Tea And Kidney Stones

Dr. Hammontree discussing ice tea effects of Kidney stones

Kidney stones are a very painful medical problem. In fact, some women describe the pain as being worse than childbirth. Kidney stones form as a result of hardened mineral deposits and urologists say that people who consume high amounts of oxalates could be at an increased risk. Along with spinach and chocolate, iced tea happens to have plenty of oxalates.

You can hear more about the link between iced tea and kidney stones by watching this brief video and consulting your urologist. The health expert interviewed here recommends drinking plenty of water with a lemon wedge to counteract the effects of the oxalates in iced tea.

Urology Associates P.C. provides sophisticated kidney stone treatment options in Tennessee. If you need to see a urologist, you can give us a call at .

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Can You Drink Hot Tea With Kidney Stones

kidney stonesdrinking teakidney stonesyoudrinking onetea

Is hot tea bad for kidney stones?

Summer is high season for drinking iced tea. However, a John Miller, Loyla University Medical Center urologist warns that iced tea can contribute to painful kidney stones because of its high concentration of oxalate, one of the key chemicals that lead to the formation of kidney stones.

Too Much Iced Tea Can Lead To Kidney Stones: Urologist

When the summer heat hits, consider reaching for freshly squeezed lemonade or water rather than iced tea, which experts say can lead to the formation of painful kidney stones.

It’s the quintessential summer drink and the thirstquencher of choice at backyard barbecues and outdoor patios. But a urologist at Loyola University Medical Center in Chicago warns consumers that iced tea contains high concentrations of oxalate, one of the key chemicals that can lead to kidney stones.

Though in healthy bodies kidney stones — small crystals made up of minerals and salts found in the urine of kidneys or ureters — are expelled naturally from the body, stones can grow large enough to become lodged in the small tubes that drain urine from the kidney to the bladder.

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What About Black Tea And Kidneys

In my kidney stone definition earlier, I mentioned that stones are caused by substances that crystallize in the kidneys. One of those crystal-forming substances is oxalate.

Well, black tea has a higher oxalate content than many other beverages. Drinking it leads to more oxalates in the urine, and it can promote stone formation if you consume too much .

One particularly memorable case of this occurred in 2014, when a man developed renal failure because he was drinking a gallon of black tea daily, which led to a heavy load of oxalates . Turns out there can be too much of a good thing!

Green Tea And Kidney Stones Studies And Findings

Does Ice Tea Really Contain High Level of Oxalates? Are There Any ...

A study has recently claimed that for each cup of green tea consumed daily, women reduced the risk of having kidney stone by 8 percent. For men the risk would go down by as low as 14 percent. These findings however initially confused scientists, because they discovered that the level of calcium oxalate in urine had increased due to the consumption of green tea which basically meant a higher risk of kidney stone.

Later in their studies they were able to figure out that it was not just about the oxalate level but also about how it affects the crystal formation.

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Risk Factors For Kidney Stones

Health Check Certified By: Dr. Gerald Morris

If youve ever had the pleasure of passing a kidney stone, you already know that something tinya solid mass of congealed minerals lodged in your urinary tractcan cause a world of agony. Luckily, you can lower your risk of developing kidney stones if you steer clear of certain risk factors.

Six risk factors for kidney stones are

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Drinking Too Much Iced Tea Causes Mans Kidney Failure

Doctors traced an Arkansas mans kidney failure to an unusual cause his habit of drinking a gallon of iced tea each day.

They ruled out several potential causes before stumbling on a reason for the 56-year-old mans kidney problems. He said he drank about 16 8-ounce cups of iced tea every day. Black tea has a chemical known to cause kidney stones or even kidney failure in excessive amounts.

It was the only reasonable explanation, said Dr. Umbar Ghaffar of the University of Arkansas for Medical Sciences in Little Rock. She and two other doctors describe the case in Thursdays New England Journal of Medicine.

The unidentified man went to the hospital last May with nausea, weakness, fatigue and body aches. Doctors determined his kidneys were badly clogged and inflamed by the food chemical called oxalate. The man is on dialysis, perhaps for the rest of his life, Ghaffar said.

Besides black tea, oxalate is found in spinach, rhubarb, nuts, wheat bran and chocolate. In rare cases, too much oxalate can lead to kidney trouble, but often theres also a contributing intestinal problem. That didnt seem to be the case for the Arkansas man, and he had no family or personal history of kidney disease.

At 16 cups of iced black tea each day, he was taking in three to 10 times more oxalate than the average American, Ghaffar and her colleagues reported.

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The Relationship Between Oxalate And Kidney Stones

Unless youre already aware of oxalate, you may be surprised to learn that many leafy greens and plant foods contain high levels of an antinutrient thats linked to higher risk of kidney stones.

Oxalic acid or oxalate is a naturally-occurring compound in plants that interferes with the absorption of calcium.

The main concern with diets high in oxalate is the formation of kidney stones.

For example, research has shown that some vegetarians and vegans who eat lots of plant foods consume more oxalate, and thus may be more likely to get kidney stones.

Kidney stones are small, hard deposits of minerals that form in your kidney and pass through your urinary tract. The most common symptoms are waves of severe pain and nausea, usually in the side of the abdomen.

Some people seem to be more sensitive to dietary oxalate than others. As a result, doctors sometimes recommend a low oxalate diet to prevent the recurrence of kidney stones.

Peoples Pharmacy Bottom Line:

Expert busts myth that fresh milk tea causes kidney stones

Do not become dehydrated Keep iced tea consumption moderate, especially in the summer Avoid grapefruit juice Drink lemonade if you are at risk of developing a kidney stone When in doubt drink water! Keep calcium intake from supplements under 800 mg per day Increase calcium intake from vegetables and other foods Consider more magnesium from green leafy veggies or from a supplement Consider probiotics periodically

If Symptoms develop seek immediate medical attention!

Revised 4/13/17

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How To Reduce Oxalate In Your Diet

Cleveland Clinic suggest these 6 steps to control oxalate for kidney stones:

Six steps to control oxalate for kidney stones

  • Eat fewer high-oxalate foods.
  • Increase the amount of calcium in your diet.
  • Limit the vitamin C content of your diet.
  • Drink the right amount of fluids every day.
  • Eat the right amount of protein daily.
  • Reduce the amount of sodium in your diet.
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    Assessment Of Tea Alcohol And Fruit Consumption

    At baseline survey, all participants were required to report their frequency of tea consumption during the past 12 months . Participants who consumed tea at least once a week were further asked to report days consuming in a typical week type of tea consumed most commonly the number of cups of tea consumed in a drinking day. A pictorial guide was provided to illuminate the standard-sized cup. According to reported tea consumption frequency, all participants were divided into three groups: never, less than daily , or daily. According to the cups of tea consumed per drinking day, daily consumers were further divided into four groups: 12, 34, 56, or 7 cups per day.

    Habitual fresh fruit consumption was assessed by a validated qualitative food frequency questionnaire . All participants were required to report how often they had consumed fresh fruits during the past 12 months . The options never or every month but less than weekly were defined as less than weekly, and 13 days per week or 46 days per week were defined as weekly.

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    Ask Kidneystonersorg: Is Instant Tea As Bad As Real Tea

    i was just in the hospital for the 2nd time with kidney stones. My question is, is instant tea as bad for you as real tea? Also what are some main foods and drinks i should avoid to prevent getting them again?


    Instant tea has a similar amount of oxalate as regular tea. Below, in order of decreasing amount of oxalate, is a list of different foods and types of teas containing oxalate.

    Food item
    1236 mg per 200 gm One box spinach
    126 mg per 90 gm About one bar
    0.68 mg per gm 1.36 mg per cup

    For most stone formers however, the three most important things to remember are to increase the amount of water you drink, decrease the amount of salt you ingest, and decrease the amount of meat protein you eat. Guidelines for salt and meat intake are similar to what is advised for all adults .

    In addition to this, keep a normal calcium intake and a moderate oxalate intake. You may also want to undergo testing with your doctor to see if a high oxalate level in the urine is truly an issue for you. Unless you have hyperoxaluria, restriction of oxalate containing foods may not be of much benefit.

    In our Ask section, we field questions from stone formers or their family members. See previous questions and answers here.


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