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What is the Pre-op diet?



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Every doctor requires a different pre-op diet. My doctor only required a 2 day pre-op diet that consisted of Clear Liquids only (apple juice, broth, Jello). You will find that other doctors require a much more rigorous pre-op diet that lasts several weeks, and consists of Protein Shakes. The purpose of that diet being to shrink the liver, and make surgery less risky. You will have to call your surgeon, and find out what their particular pre-op requirement is.

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It is an evil thing that just must be done (at least for some of us)!

Too funny!

Thanks, citygirl, for the information. I thought I was missing something on here.

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I was on a 2-day diet of clear, sugar-free liquids. Broths, sugar-free popsicles, sugar-free Jello, etc. No fruit juices, nothing with "no added sugar," etc.

This is far from scientific & detail accurate, but you'll get the idea.

Part of what the liver does is function as sort of a pantry to store various things our body needs. Cans of glycogen (a sugar form), boxes of Vitamins, barrels of Iron, etc. When we don't have those things in our system -- say we haven't eaten anything yet -- but our body is hungry for them, the liver opens up the pantry, takes some of its reserves, and pushes them out into the body.

By controlling our diet to ensure some things are missing, the liver is forced to deplete its stores, which causes it to shrink in size (my analogy would be a sponge that has been wrung out).

The liver is pretty much in the way of where our surgeons need to do their work. So... the smaller the liver, the easier time surgeons have of positioning the band, and the lower the chances of organ damage.

Plus it's a good jump start to weightloss.

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I started my pre op diet today. My surgery is Feb 20th.

My diet consits of

Carbs: not more than 30 grams per day

Protien: minimum of 70 grams per day

Fat: Not more than 10 grams per day

The day before surgery only sugar free clear liquids

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It depends on your doctor, usually also depends on your BMI. My doctor didn't require one for lower BMI patients. They all vary.

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    • buildabetteranna

      over 20 lbs down since4 the pre surgery diet and surgery on the 14th
      · 1 reply
      1. Selina333

        Yay!! Congrats. I know how good that feels. 🤩

    • Jenopolis

      Had a sleeve in 2017, lost over 100 pounds. Had a DS surgery this year (2025) for more sustainable weight loss. 🤞
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      1. This update has no replies.
    • buildabetteranna

      The 14th was my day. I am home and recovery is going pretty smooth. They even let me walk out of the hospital. Picture of me in recovery curtesy of my boyfriend lol. 

      · 3 replies
      1. DaisyChainOz

        Glad it went well!! Wishing you a speedy recovery and wonderful success!! 🤗

      2. buildabetteranna

        Thank you ❤️

      3. Selina333

        Neat you have a pic of this day! I was sooo happy to get my surgery. It was well worth it! And I'm not even near my goal. I had surgery Dec. 2!

    • Alisa_S

      Bought a treadmill and some 5 lb weights. Time to get off my butt and get moving!
      · 1 reply
      1. DaisyChainOz

        That's a great choice! 😊

    • DaisyChainOz

      Surgery done!  Really looking forward to the next chapter 🥳😁
      · 3 replies
      1. GreenTealael

        Congratulations!!🎉

      2. Bugzy46

        Congrats

      3. Alisa_S

        Fantastic! Best of luck to you & I hope you're healing nicely & not having much pain!🙏

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