National Institutes Of Health: Cola Causes Kidney Problems

Do you like kidney stones? Great! Coke and Pepsi are the drinks for you. Researchers at the National Institutes of Health found that drinking just two cans of cola per day doubles the risk of chronic kidney disease.

In a study published in the journal Epidemiology, the team compared the dietary habits of 465 people with chronic kidney disease and 467 healthy people. After controlling for various factors, the team found that drinking two or more colas a day — whether artificially sweetened or regular — was linked to a twofold risk of chronic kidney disease.

Drinks without high levels of phosphoric acid—seltzer and other “noncola carbonated beverages”—don’t seem to anger kidneys.

The Claim: Too Much Cola Can Cause Kidney Problems [NYT] (Thanks to Sacha!)
Carbonated Beverages and Chronic Kidney Disease [Epidemiology]
PREVIOUSLY: Is Drinking 12 Diet Cokes A Day Healthy? Coke Thinks So.
(Photo: So Cal Metro)


Edit Your Comment

  1. azntg says:

    Good, let me keep chugging my 7UP or Sprite :-P

  2. PølάrβǽЯ says:

    So maybe it IS a good thing I kicked CocaCola for Monster. Well, good for my kidneys, bad for my blood pressure. If it ain’t one thing…

  3. TechnoDestructo says:

    I was going to say “JUST two cans”? But there was that period a couple years ago where I was drinking about 2 cans of diet coke per day.

  4. snoop-blog says:

    man i’m still a coke-head. i get accused of coke abuse when i leave half drank cokes around.

  5. snoop-blog says:

    @TechnoDestructo: well i’m a bit sick, but i drink about 6 per day. have for years.

  6. Infe says:

    @aaron8301: Ugh, seriously? Just the price of that stuff is enough to drive me away without ever trying it…

  7. 8abhive says:

    Kicking sugar-water drinks (mostly diet coke for me) was a battle. No ill to current drinkers, but results like these sure make me glad those drinks are in my past.

    I wonder at what point the healthcare costs from the vast numbers of junk-drink consumers will outweigh costs from nicotine.

  8. snoop-blog says:

    @azntg: this article (though seems to just be common sense) does open my eyes to my bad habit though. if sprite or seven up really is better, i would switch. i’m assuming by your comment that they have low levels of phosphoric acid. don’t have one near by to check.

  9. EmperorOfCanada says:

    Easy solution coke: Take phosphoric acid out of the recipe! You can’t seriously expect people to stop drinking that liquid crack.

  10. dandd says:

    A study done on less than a 1000 people just doesn’t impress me as being all that accurate.

  11. SkyeBlue says:

    I stopped drinking Cokes for a few months a couple of years ago and lost 35 pounds without even really dieting. But now I am back up to 2-3 a day and trying to quit again is HARD!

    Sometimes I wonder if the soda companies put something in them to make the caffeine more addicting, like the cigarette companies do to the nicotine in their product? People seem to have such a hard time when they try to quit drinking them.

  12. dvsman says:

    Hmmm I would wonder if this is related to High Fructose Corn Syrup rather than Cola per se.

    They mention Natural Sweetener vs. artificial sweetener but don’t mention HFCS (which is a “natural” sweetener only in the loosest sense of the word IMHO.

  13. matt says:

    God damnit. I drink alcohol in moderation, don’t smoke, try to eat as healthy as possible for a college student, and get by ONLY on diet coke. WHY DID I HAVE TO READ THIS?

  14. Omi says:

    Crap! At the movie theatre where I work emploies are allowed practialy unlimited amounts of soda. So like everyone else working there nearly half my diet is pepsi! (The other half of my diet is of course the unlimited free popcorn.)

  15. snoop-blog says:

    @Omi: lol

  16. EmperorOfCanada says:

    Meh, everything is bad for you. The chair you are sitting on right now is probably giving you cancer. Seriously.

  17. swalve says:

    “The authors of the study say more research is needed”

    @dvsman: Fructose comes from fruit. Can’t get much more natural than that.

  18. cashmerewhore says:


    HFCS is evil.

  19. BStu says:

    First off, the fact that they are studying people who HAVE chronic kidney disease and not studying what people are doing up to when they develop chronic kidney disease is an important distinction. It cannot be assumed that the habits of people WITH a disease are the same as people who may yet develop that disease.

    Secondly, and more importantly, lets look at the risk multiplier. It says the study found drinking 2 cans of soda doubles your risk of kidney disease. Remember though, that its doubling the ordinary risk of kidney disease which is still quite small. 1 times 2 is still just 2. Twice not much risk is still probably not much risk. That’s the key thing to remember whenever you hear that something doubles your risk of some other bad thing. Your risk of getting that bad thing probably isn’t high to begin with, so doubling it isn’t going to get that much higher. Smoking, for instance, increases cancer risk by 10 to 20 times. That’s 1000%-2000% increased risk. A 100% increase is just a lot smaller and not something to panic about every time an initial study comes out that gets the media all a flutter.

  20. Grrrrrrr, now with two buns made of bacon. says:

    Everything is bad for you. Life is the ultimate terminal illness, so pick your battles.

    One point that I’d like to point out over every “OMG, this is going to kill you” article is that people also get cancer right out of the blue, even if they’ve never smoked, drank, or swilled Coca-Cola out of a 55-gallon drum. You could also get killed tomorrow by a bus.

    My uncle died from pancreatic cancer at 60, and he never smoke, drank, or gambled, so you can still do everything absolutely right and die earlier than somebody who broke every rule in the book.

  21. 8abhive says:

    @swalve: Fructose comes from fruit.

    It can, but the fructose found in HFCS comes from highly processed corn combined with toad eyes and cat urine. Okay, no eyes or urine, but neither is there a fruit component.

  22. clankboomsteam says:

    Why is this news to anyone? It’s common knowledge that colas cause kidney stones — ask any doctor what the first question is that they ask kidney stone patients, and they’ll tell you they ask “do you drink a lot of cokes?”. Old news.

  23. LucyInTheSky says:

    Dr. pepper or dew for me, both pepsi and coke are pretty nasty.

  24. riverstyxxx says:

    The last time I decided to support coca-cola was this:
    I was in the store and picked up a case. After I left and went home, while I was putting the case away I looked underneath it and it said something along the lines of this:
    “Coca Cola is Refreshing, Rehydrating and Good for you because it contains water, the most essential nutrient!”

    As I recall, the last time I heard that was when one of the stooges who works for the food and beverage industry decided to step up to the microphone and give a speech to god knows who. I think his quote went something like “Soda contains water, and I think that’s nutritious”

  25. PassionateConsumer says:

    Whatever. I will continue to drink my two to three Zeros a day, which are a little slice of liquid heaven, and make me happy. Why should I give them up on the CHANCE that some study of a few people is right, and I have twice the chance of developing stones? I could kick from a heart attack, or get run over tomorrow. I’ll go pop open a pop right now.

  26. Half Beast says:

    I’ve managed to reduce my soda intake to an allotment of 8 (2x 4-pack) Jone’s pure cane sodas a week. A lot of my drink intake has been switched to pressed/squeezed juices and water.
    Heaven is a cold glass of Martinelli’s Unfiltered Apple Juice. srsly.

  27. bohemian says:

    Seven up has phosphoric acid in it also. I thought that was going to be my way around not drinking coke anymore until I read the label. Phosphoric acid can also deplete the magnesium in your system leading to magnesium deficiency that can cause muscle cramps and all sorts of things. According to some dentists drinking lots of soda will do worse things to your teeth than meth will. Oddly enough orange soda is worse than coke on your teeth.

    I have cut my soda consumption down to a few here and there.

  28. KJones says:

    I can see the new campaign slogans already…!

    “Have a colic and a smile!”

    “Dyspepsia, the choice of new generation!”

  29. B says:

    @cashmerewhore: Diet cola doesn’t have HFCS but it still causes the kidney problems according to the article.

  30. eyesonly says:

    @LUCYINTHESKY: You’re in the clear with Mountain Dew, but Dr. Pepper does contain phosphoric acid, so as far as these types of studies are concerned, it’s in the same category as Coke/Pepsi.

  31. ExVee says:

    Well, crap. I down a two-liter of RC on a daily basis.

    Of course, any carbonated drink will eventually cause irreversible damage to your skeleton, cola or not. Not to mention that some drinks more or less have potentially cancer-causing chemicals as part of their ingredients. You people do realize that our processed food lives are slowly killing each and every one of us, right? It’s just, and no pun intended, not natural. It’s a big part of the major disease issues we’re facing more and more. A great many illnesses can be traced back to products we all use literally every day.

    The really sad part is that it’s beyond the majority of us to truly do anything about it because most of us lack the means to break out of the grasp of processed goods. We get to not only slowly kill ourselves, but also be aware of it, and know we can’t stop it from happening. Joy oh joy.

  32. DMDDallas says:

    @dwayne_dibbly: The point isn’t that you can cheat death by being healthy, the point is there are correlations between many types of behavior (eating garbage food, for example) and the onset of diseases and premature death.

    If you eat right, exercise, and generally follow good habits, you’re more likely to live longer and have a healthier life than others who do not.

  33. edebaby says:

    From Pepsi’s web site regarding Phosphoric Acid:

    Phosphoric acid is added to some soft drinks to act as an acidulant. Acidulants add a pleasant tartness to soft drinks and act as a preservative. The use of phosphoric acid results in the beverage having some dietary phosphorus. Phosphorus, like calcium, is an essential mineral for bone health. It is widely distributed in the food supply, including fish, milk, meat, eggs and cereal grains. A small amount of the clear, colorless liquid known as phosphoric acid is added to carbonated soft drinks to provide tartness, essential to a well-rounded flavor. Carbonated soft drinks, however, are not a significant source of phosphorus in the diet, generally contributing only 2% to 4% of the daily dietary phosphorus intake. For example, one cup of milk contains 250 mg of phosphorus while an equivalent amount of cola contains no more than 48 to 56 mg. The U.S. Recommended Dietary Allowance of phosphorus for adequate nutrition is 800 mg per day.

  34. BalknChain says:

    This is why I drink GrandPop. Best enjoyed while rocking on the front porch and yelling at the neighborhood whipersnappers.
    *yes, I completely made that up

  35. HooFoot says:

    Last year, I stopped drinking soda. Two weeks ago, I broke down and bought a soda because I had a bad craving for one. I managed take 3-4 sips before I had to throw it away. I could actually feel the texture of the awful high fructose corn syrup on my tongue and it grossed me out. I can’t believe I drank that junk for decades.

    The hardest part is giving it up. But after a week or two, you won’t miss it at all.

  36. hardcle says:

    I’ve had kidney stones and they’re no fun. From what I’ve read one of the primary causes is caffeine. Which means not only colas, but many other carbonated drinks as well. Look at the cans and you’ll be surprised at how many non-cola beverages have caffeine. Coffee and chocolate are also problematic.

    Ever since I was hospitalized with kidney stones a few years ago, I’ve limited myself to one caffeinated beverage a day, usually coffee. My favorite substitutes have been diet Sprite, 7-up and ginger ale. It’s been reasonably successful, since I haven’t had to goto the hospital again, but I still have some pain whenever I don’t drink enough water. The only problem is my dentist is now telling me I’m drinking too many diet drinks. I can’t win.

  37. icntdrv says:

    JONES SODA ftw!

  38. matt says:

    @hardcle: It’s at this point where I’ll take the kidney stones if it means living a life enriched with coffee, chocolate and soda.

    Or chocolate covered espresso beans….mmmmm

    Fuck it. I’ve got a homemade pizza in the oven and a diet coke to my lips. I’ll take my chances.

  39. DMDDallas says:

    @matt: You know, its not really hard to eat healthy food and enjoy it.

    It is like people get some sort of perverse pleasure out of ingesting junk food.

  40. DePaulBlueDemon says:

    I’m ashamed to say it, but I love my Coca-Cola. I drink about 4 cans a day. It’s just soooo delicious. :)

  41. meneye says:

    @aaron8301: it seems like you went from bad to worse. Monster is worse for ya.

  42. i’ll drink to that. drink diet coke, that is.

  43. Pipes says:

    @HooFoot: You know, I wish I could agree with the “you won’t miss it at all” part. I went from about 2 liters/day to nothing – nothing! in a month. Lots of water, juices, & soy milk. Everyone said I’d feel more alert within 2 weeks of kicking the stuff – it never happened, and I missed Coke terrrrribly. I now have come to a good balance. I don’t keep it in my house, but every time I fill up my tank, I pop into the gas station’s store and grab a small one. Seems to work okay.

  44. faust1200 says:

    Let he who hath some cola pass the first stone.

  45. mikelotus says:

    these are preliminary results, so hold your pants.

    @dandd: why? what standard deviation do you get at 1000 and what std. dev. do you want and what will n equal then?

    @dvsman: there is no, i repeat, zero evidence that HFCS is any worse that straight cane sugar health-wise.

    @clankboomsteam: might be common knowledge, but its unproven common knowledge.

  46. rheath2 says:

    Guess I’m screwed then. Then again, for every bottle of Coke I put down in a day, I have an equal amount of milk or water, so maybe it’s flushing out of my system.

  47. EmperorOfCanada says:

    @DMDDALLAS Um. Yes it is extremely hard to eat healthy food and enjoy it. Why do you think North Americans are so fat, because brocoli is so delicious?

  48. elisa says:

    I agree. I stopped drinking soda cold turkey a couple of years ago, when I realized how much money I was wasting on sodas when I would be perfectly happy with water. (I’m one of the few people I know who naturally drinks the recommended eight glasses a day of water, and this is even when I don’t exercise that day…)

    But, when I try Coke, Pepsi, etc now because I am tempted by free soda at an event, I am struck anew by how nasty they taste. It really is just colored water and sugar (HFCS). And then I go back to my trusty water.

  49. idx says:

    I guess I can always hope that the Knob Creek I mix with the coke will some how sterilize the horrible effects of the phosphoric acid and the white man’s poison (HFCS).

  50. dvdchris says:

    All black colas contain phosphoric acid. Neither Seven Up or Sprite contain phosphoric acid but some citrus-type sodas do.
    Before this study, phosphoric acid has been known for years to remove calcium from your bones to deal with the unnatural phosphorus you are consuming. It also neutralizes the hydrochloric acid in our stomachs needed to digest food and absorb nutrients, especially calcium.

  51. RvLeshrac says:


    I hate it when people spout self-righteous BS at me and others all the time like that.

    I’ve stopped drinking cola for periods of time (it interferes with certain medications, primarily pain relievers, so when you have your wisdom teeth out…), and have never noticed a difference for the better.

    I’m quite aware that caffeine is a horribly addictive drug, though. The withdrawal from both the caffeine and the sugar is excruciating.

    The end result is that I feel just like I did before stopping, but suffer the withdrawals and have a harder time waking in the morning and working through my 14 hour shifts.

    I get the same rot about smoking, as well. I’ve stopped for months because I wanted the money more, and the only ‘benefit’ I noticed was that I felt far more stressed out while at work and ate roughly twice as much (which sort of killed the whole ‘saving money’ thing).

    You can argue that cola and other soft drinks will make you gain weight. You can argue that smoking has a variety of health risks. You can’t argue that dropping them will suddenly free you of all your problems and make your crap smell like roses, though, and that’s what people want us to believe.

    I don’t necessarily doubt the results of this study (but then, it isn’t like anyone is arguing that soft drinks are good for you), but until it is at least replicated, and at best replicated with a much larger group, I’m not going to just accept the results carte blanche.

  52. RvLeshrac says:


    Oh, and HFCS is used in nearly everything you consume, so I’m sick of people going on and on and on about how they can ‘feel’ it and ‘taste’ it.

    There’s a taste difference between cane sugar and refined sugar. There’s no difference between refined sugar and refined sugar, however.

  53. RvLeshrac says:


    If you’re drinking eight glasses of water a day, you might as well stop eating. Drinking eight glasses of water in addition to what you get from the food you eat simply causes your body to flush the nutrients you’re consuming.

    People like to spout that one, too. The original study specified that the human body needs 64oz of water a day, it said nothing about consuming 64oz of plain water. Further studies determined that consuming that much water in addition to your intake from everything else you consume (soups, vegetables, sauces, milk, etc.) overhydrates your cells, causing them to release waste material that contains more unprocessed nutrients.

    The short of it is that if you pee and you can barely tell that it is yellow, you need to drink much less water.

  54. RvLeshrac says:


    Not difficult at all to enjoy healthy foods. “Healthy” doesn’t mean “bland.” Some people enjoy plain broccoli. Adding a light cheese sauce isn’t going to kill you, though. Doesn’t need to be swimming in it, of course…

    You can also pick up bags of shelled edamame for not much more than peas, and steam them for 10-15 minutes. Steamed asparagus is great.

    Spaghetti squash with marinara sauce… butternut squash soup… baked yams with some real butter (just skip the margarine, it doesn’t taste as good and isn’t really much better for you)… pot roast with veg… broccoli soup (made with some of the broccoli-water, not with milk/cream, and properly seasoned)…

    You don’t have to be scared of seasoning the food to eat healthy. The main factor is time, which most of us don’t have. Eating healthy takes far longer, but tastes just as good.

  55. XianZomby says:

    I’d like to have a compiled list of all the things that contribute to my demise. Smoking, drinking, soda, HFCS, trans fats, etc. I wonder if they had such a list, and you avoided everything on it, would you live forever?

  56. bnpederson says:

    You might… but would you really be living or would you just be continuing to exist?

  57. facted says:

    I have not read the Epidemiology article, but there are a few things to consider.

    A) Association does not imply causality, which is a mantra of statisticians, esp. in medicine. (There is a link, for instance, between high homocystine levels in the blood and increased cardiovascular events like heart attack and stroke. However, reducing homocysteine levels with folic acid has not been shown to reduce these events!)

    B) And again, I haven’t read the study…but, this type of study is really a terrible way to analyze a question. They group together a whole bunch of people who now have CKD and asked them how much soda they have had in the past. This type of study can be very, very biased based on “recall” and what patients are able to (or want to) tell you.

    C) Again, study design: Patients who drink 2 or more sodas a day, may also be more likely to develop obesity. With the increased sugar and obesity, they may also be at an increased risk for Diabetes, which is a MUCH larger risk factor for developing CKD than soda would be. In such a small study of 800 total patients, it would be very difficult to control for things such as Diabetes, obesity, etc, though they may have tried…Just something to look at.

    Personally, and I’ve said this before: as a medical professional, I don’t really appreciate Consumerist’s sensationalistic attitude towards medical stories when the editors often don’t understand the true issues being discussed. Either get a medical professional to help with the stories, or stop publishing such articles.

  58. sleepydumbdude says:

    I’ve tried to quit drinking sodas but I can’t seem to get past the horrible headaches I get while at work when I don’t have them.
    I drink a lot of sodas at work because I’m bored and need to stay awake. On days I work I go through 7-10 cans a day and if I go out later that night then add 4 more to that. I have a soda problem. :

  59. Ghede says:

    Already knew this. My urologist told me. When I passed my first kidney stone. At age 18.

    **** you pepsi.

  60. facted says:

    One more thing: Chronic Kidney disease (CKD) is not the same thing, at all, as kidney stones. CKD refers to decreased renal function on a long-term basis that eventually requires hemodialysis. Kidney stones may be linked to soda use, but that is not what is being referred to here by Chronic Kidney Disease.

  61. dvsman says:

    Coke / Coca Cola taste good, especially when I was overseas. Take the taste test yourself if you don’t believe me (buy some foreign coke that they sell at a Bodega (with Spanish print) / Asian market (with the Asian print) VS. the US retail Coke / Coca Cola).
    That is the difference for me in the real sugar vs. HFCS debate.

    I don’t believe the radical or real media “hype” but I do believe my own taste buds. REAL sugar may or may not be healthier for me but it sure tastes better to me.

    Regardless of that though, I am now down to only only 1 can per week nowadays and this was primarily due to the news program where they use Cola to clean porcelain toilets. If it can clean – and I mean CLEAN to sparkly white CLEAN – toilets, you have to imagine what cola can do to your teeth, insides, etc.

    Don’t have to be a scientist to figure that one out.

  62. Jean Naimard says:

    Hmmm. Now how long before Congress passes a law prohibiting the disparagement of soft drinks???

  63. Tank says:

    I think if you add rum & a lime to the cola, you are shielded from the bad stuff. That’s the theory I’m sticking with.

  64. darious says:

    @8abhive: “I wonder at what point the healthcare costs from the vast numbers of junk-drink consumers will outweigh costs from nicotine.”

    Ah yes. The favorite bludgeoning instrument of the safety-nazis in their quest to legislate away the rights of people who want to enjoy their lives.

  65. darious says:

    @sleepydumbdude:”I’ve tried to quit drinking sodas but I can’t seem to get past the horrible headaches I get while at work when I don’t have them.”

    Not a soda problem, a caffeine problem. Take it from someone who knows. :)
    IANADNDIP1OTV (I am not a doctor nor do I play one on TV) but I -believe- that, caffeine being a vasodilator, the headaches are caused by the loss of caffeine from the blood vessels in your brain. That’s my uneducated theory, but I’ve personally found that ginkyo (another vasodilator) helped take the edge off the headaches whenever I’d go cold turkey.

  66. darious says:

    @xianzomby:”Smoking, drinking, soda, HFCS, trans fats, etc. I wonder if they had such a list, and you avoided everything on it, would you live forever?”

    That’s not the real question here. The real question is… would you even want to?

  67. PassionateConsumer says:

    “let he who hath the cola, pass the first stone”


  68. lostingenerica says:

    has anyone seen what Coca-Cola is now putting on their boxes? something that tells consumers that Coca-Cola and soft drinks are thirst quenching and hydrating. YEAH! ’cause we all know CAFFEINE HYDRATES YOU!!! I think if you were to look in any health book it would say that you should drink a certain amount of water per day, and that includes anything EXCEPT caffeinated drinks or alcoholic drinks. WHO THE FUCK DO THEY THINK THEY’RE FOOLING?! Oh right…we Americans are stupid and gluttonous.

  69. sleepydumbdude says:

    @darious: thanks have to try that

  70. swalve says:

    @cashmerewhore: I stand corrected. Good argument.

    @8abhive: Can’t get much more natural than corn. Molecules are molecules, don’tcha know.

  71. Xerloq says:

    Hate to break it to those who hit ANY carbonated drink heavily, but you need to RTFA.

    Kidney stones are not the same as kidney disease.

    “Carbonated beverage consumption has been linked with diabetes, hypertension, and kidney stones all risk factors for chronic kidney disease.

    Frequent drinking of anything carbonated can cause kidney stones – it caused mine. Switching to from Coke to 7-UP won’t help. Sure, you might not have chronic kidney failure, but you’re still at risk for the stones according to my urologist.

  72. Balisong says:

    I don’t care how inaccurate the study is, I’m sending it to my mother in my never-ending quest to get her to stop drinking four two-liters of Coke every week.

    The note about how it pulls calcium from bones seems more frightening to me :

  73. Rusted says:

    Thanks to HFCS, most soft drinks in the USA are nasty. Especially after spending a few years overseas. The real thing they ain’t. I’m beginning to like water a lot lately.

  74. Arcaynn says:

    <– Screwed.

  75. pigeonpenelope says:

    i can somewhat believe this. i produce dime size kidney stones every three years and have to have them surgically treated. one of my favorite drinks (although i drink water more often) is coke. I love it! Since my kidney si free and clear of stones, now is a good time to part ways with coke and see if that was what was causing the stones.

  76. MeOhMy says:

    Many members of my family have what can best be described as an allergy to phosphoric acid. Most of us get sick from sodas that have it. Some of us can’t even handle what you get from creamy salad dressings.

    Maybe it’s a natural defense mechanism!

  77. Sunflower1970 says:

    Interesting. For one of my New Year’s Resolutions I decided to stop drinking pop for the year. So did hubby. Now that I’m reading this, I might just stop drinking it forever :)

  78. ancientsociety says:

    @Sunflower1970: So did my wife and I! (although we do cheat and have 1 every 2 weeks or so but the craving is no longer there for it)

    We also made it a requirement that we drink 2-3 14oz glasses of water a day (in addition to other drinks). Honestly, I don’t remember the last time I felt this good. The soda companies can keep their HFCS and phosphoric acid – I’ll stick to water, coffee, and alcohol.

  79. axiomatic says:

    Speaking as a person who has had repeated kidney stones.

    This is very true. Coke/Pepsi and RED MEAT are large contributers of kidney stones.

  80. yashichi8bit says:

    Not surprising at all

  81. Mom2Talavera says:

    I love to add Braggs Liquid Aminos to my dishes…yum!

  82. facted says:

    The study article does not talk about kidney stones. It’s talking about chronic kidney disease, which actually has nothing to do with kidney stones. CKD is when your kidneys begin to fail (there are many causes), and you need to be put on dialysis.

  83. pigeonpenelope says:

    @axiomatic: red meat is a contributor of a certain ingredient that can make up kidney stones.. red meat produces uric acid which can make stones in the kidney if your body doesn’t metabolize uric acid correctly (in that case you can take a pill).. it is important not to assume if you have a stone that it was caused by red meat (or for soda, for that matter, which is rumored to produce a calcite based stone). is much more important to have your urologist send the stones and your urine in for testing. your urologist will tell you what foods and things to avoid and then tell you that you need to drink more water. i just wanted to point that out. so ends my public service announcement.