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Home » Blog » How to Eat During a 24-Hour Urine Collection

How to Eat During a 24-Hour Urine Collection

Jill Harris, LPN, CHC Avatar

Written by

Jill Harris, LPN, CHC

Updated

July 12, 2024

Looking through prior blog posts, I noticed I had never written about how to eat during urine collection. Here’s an article about why you should do a urine collection—it’s the most critical thing you can do to see WHY you are forming stones. This article is a must-read.

First 24-Hour Urine Collection Day

If this is your FIRST urine collection, you should be eating and drinking like you did before you knew anything about stone prevention. I know you’re thinking, “There is no way I am going to eat spinach and almonds ever again!” Fair, but do everything else like you did. If you were not drinking much water, do the same thing on the first collection. Did you eat out a lot? Go out to eat during your collection. You want to see how that old way of eating changed your urine chemistry into that of a kidney stone maker.

And no, YOU WILL NOT MAKE A KIDNEY STONE IN 24 HOURS, nor will an existing stone grow in 24 hours. That being said, I am fully aware you might ignore this advice bc you have been traumatized by that kidney stone you passed or had removed! I am merely explaining what one SHOULD do.

If you do choose to ignore my advice (I will not have hurt feelings), please alert your doctor that you changed your diet to the kidney Stone Diet® during your collection so they understand why your results look so good! Because some of them come back to me and say, “Jill, these are a waste of time and tell us nothing. Why do you keep telling patients to do them?” I explained that you guys changed your diet, and the doctor understood.

Follow-Up Urine Collections 

Follow-up urine collections are the only way to see if your lifestyle changes have the desired effect, which means they are lowering your kidney stone risk. Some of you will exceed expectations, and your results will show that your kidney stone risk remains low. That is an excellent feeling! Good for YOU!

Some of you will see that despite your best efforts, it might be time to bring a medication into the treatment plan. Please don’t give up hope; the meds used in kidney stone prevention have their place for certain people and can and will (in most cases) lower your kidney stone risk.

The follow-up urine collection is the day to show the doctor, me, and yourself how far you have come on the Kidney Stone Diet®. But I still want you to be reasonable. Do the Kidney Stone Diet® but on your average day. If you are still not near the sodium or added sugar goal, show where you are.

Eat as you usually do with the new changes you have incorporated. This way, you can see if your kidney stone lifestyle is having the desired results we are looking for to lower kidney stone risk.

Food Tracking on Follow-Up Urine Collection Day

Many of my patients and students write down what they eat on the day of both urine collections. It can be beneficial to see how well you choose foods, whether or not you’re getting enough calcium or still overeating salt.

When I go over urine collections, I will often ask if you remember what you ate, and this can help me help you identify foods that have salt that you might have overlooked. It happens a lot!

An Essential Side Note

Do you know how I always say that if Harvard didn’t study a food, eat that food once or twice a week in standard portion size? AND get your calcium needs met each day? Well, if you are eating a food that you don’t know the oxalate content of, please eat that food during the follow-up urine collection so that you can see if it is increasing your oxalate level.

I’m sure it isn’t, but I think you will be happy that you did it for peace of mind. My patients tell me this is excellent advice, and I think it will be for you, too.

Annual Urine Collections

Don’t forget to get your annual urine collections done. Your doctor most likely will NOT remind you but I can’t tell you how many patients don’t do this and wind up with another stone. Please read this article to discover why and ensure it does not happen to you.

Your friend and advocate,
Jill

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Jill Harris, LPN, CHC Avatar

About the Author

Jill Harris is a Licensed Practical Nurse (LPN) who specializes in kidney stone prevention. Her goal is to teach you what you need to know and, more importantly, how to put that knowledge to work so you can stop forming stones. For good.
  1. Lisa R Harris Avatar
    Lisa R Harris
    July 21, 2024

    The only time I got urine test is when I had surgeries, saw a functional doctor and when they did physicals different over 30 years ago for me.
    I’m currently 62.

    Reply
  2. Lisa R Harris Avatar
    Lisa R Harris
    July 21, 2024

    I forgot. I like reading your article and I did reduce eating spinach and almonds and almonds milk when I red about oxalate about a year ago 😊

    my current doctor does not give me urine test and I have been seeing him since 2019. Now I will ask him how would I know without the test. SMH

    Reply
    1. Jill Harris, LPN, CHC Avatar
      Jill Harris, LPN, CHC
      September 18, 2024

      Hi Lisa,
      Yes, get one done. There are results on that test that you would not know is causing stones. Get it done!
      j

      Reply
  3. IRV TEVIOVITZ Avatar
    IRV TEVIOVITZ
    August 2, 2024

    Almonds and almond butter are very very healthy. If I always have high-calcium foods when I eat almonds, is it okay to eat as many almonds as I want?

    Reply
    1. Jill Harris, LPN, CHC Avatar
      Jill Harris, LPN, CHC
      September 18, 2024

      Hi Irv,
      Just bc a food is healthy does not mean you should eat as much as you want of it. And since my practice is filled with patients who eat as much as they want with high oxalate foods, I would very much advise against it.
      j

      Reply
  4. Sandrs Newton Avatar
    Sandrs Newton
    August 2, 2024

    Finding doctors who will order 24 hour urine test. I’m in South Carolina. I know at one time you gave this information out. I can’t find this information anymore. I have recently moved and would appreciate your help. Thank you

    Reply
    1. Jill Harris, LPN, CHC Avatar
      Jill Harris, LPN, CHC
      August 10, 2024

      Hi Sandrs,
      You can find the patient recommended urologists right here on my blog: kidneystonediet.com/blog
      j

      Reply
  5. Jim Kocsis Avatar
    Jim Kocsis
    September 18, 2024

    Jill,
    I had lithotrypsy in july for a 7mm stone . I took chanca piedra liquid initially , then stone relief cleanse. Then after lithotrypsy I took stonexyl which worked for me the best for passing stones after lithotrypsy. They wanted to do a second one because there was a big piece stuck at my bladder and passed it while cutting grass – 12 hrs before my 2nd surgery – which was cancelled . ( i did drink a ton of water , lemon juice ,apple cider vinegar .I jumped -rope ,off of steps ,off a flatbed trailer and did yoga.)Iam getting a 24 hr urine collection soon so i will eat like i did the day before and not drink too much water . I signed up because the doctors aren’t too focused on prevention and haven’t been able to get an appt with a dietician. I’m 5’5 150# and 57 years old and had 3 small stones I passed in the last 30 years without going to the hospital . So , I’m concerned , a bit confused and willing to try this program.
    Jim

    Reply
    1. Jill Harris, LPN, CHC Avatar
      Jill Harris, LPN, CHC
      September 18, 2024

      Hi Jim,
      Promise that I can help. When you get your urine results make an appt with me and I can help you understand them so that you can talk with your doc well educated. When you understand all this entails, the conversations with your doctor will be much more proactive and you can get on the best treatment plan.
      Looking forward to helping,
      j

      Reply
  6. Jill Schemper Avatar
    Jill Schemper
    November 21, 2024

    I have interstitial cystitis, painful bladder and burning! Would I benefit from having a consultation with you Jill? Thank you!

    Reply

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