How do I control my blood sugar levels on the pre-up diet?

on 4/28/20 8:17 pm

I'm type 2 diabetic on oral meds and insulin and having weight loss surgery (Roux-en-Y) in a few months. I tried the pre-op liquid diet for a day to see what it will be like and my blood sugar kept bottoming out. Now I'm worried I won't be able to safely manage the pre-op diet OR post-op diet. Does anyone have tips, tricks or suggestions that might help with this? Thank you.

on 4/28/20 8:19 pm

Pre-Op diet... Dang auto-correct LOL!

on 4/29/20 6:03 am

I would call your surgeon and have them put you in contact with their endocrinology partners. This is too serious to be getting advice from the internet. They should know exactly what you need to do.

HW 510 / SW 424/ GW 177 (stretch goal to get 10 under) / CW 178

RNY November 2016

PS: L/R arm skin removal; belt panniculectomy - April, 2019

on 4/29/20 10:20 am

I agree with the above commenter. My mother is type 2 diabetic and since I have not experienced/had diabetes, I wouldn't have the slightest clue how to answer the questions she always asks. I couldn't imagine if she had to take meds on top of it. She controls hers through diet... Not something to mess around with, for sure!

Melody P.
on 4/29/20 11:25 am - TX

I was on insulin for type 2 diabetes pre op to my VSG. You really need to talk to your surgeon, pcp or endocrinologist about this. When time comes for you to do the actual diet they will likely cut your meal time insulin and the longer acting as well. BUT they need to be the ones to tell you that.

tell them exactly what you've wrote here. They really need to be the ones to tell you what you need to do.

39 F and 6 foot 2 inches

VSG - 3-14-18 - - - Revision to RNY - 5-29-19

One day at a time.

on 4/29/20 1:14 pm

I agree with everyone it's best to consult with your team of doctors. I've been doing a 3 day trial of the pre op diet this week and I'm also type 2 diabetic. We came up with a plan for my bs levels and corresponding insulin doses. It's worked pretty well there was only one time were I was getting really low and I ate a sugar free pudding it has some carbs so it was enough to bring me back up into a more normal range.

on 4/29/20 1:19 pm

Also, knowing what you ate during that day may help. I was to have:

3 protein shakes a day at least 20gm each.

At least 64 ounces of liquid (water, sf flavorings, broth, sf jello).

3 snacks (low fat/non fat yogurt, sf pudding, low fat cream soups w/skim milk)

on 5/12/20 12:51 am, edited 5/11/20 5:57 pm


thanks to sharing this knowledge.

[url=] shambhavi mahamudra [/url]

Citizen Kim
on 4/29/20 3:42 pm - Castle Rock, CO

You will need to monitor your blood sugars and adjust your insulin/meds accordingly, assuming you've been educated to do so?

If not, your endocrinologist and or diabetic nurse will be able to help you.

Proud Feminist, Atheist, LGBT friend, and Democratic Socialist

on 4/29/20 6:24 pm

Thank you for your comments everyone!

I've been attending a really good bariatric program which is on hiatus right now due to Covid-19. My next appointment will be with the surgeon so I will make sure I have a list of questions ready for him. I will also need to take a nutrition class through the program pre-surgery but it is usually done in-person so social distancing might force them to provide that online. I do have an endocrinologist but the appointment I had set to discuss this with him was cancelled due to, again, Covid-19. And he isn't doing appointments by phone. One way or another, I will see him before I start the 2 week pre-op diet.

The 2 week pre-op I will be on consists of 5 Boost diabetic protein drinks a day. I'm finding it really helpful (and interesting) hearing what other pre-op diets consist of and how people have had their medications adjusted during pre-op and post-op.

Your comments are all very much appreciated ?

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