HI,

I'm about 40 days out from my surgery (booked for Dec 17th) Mexico, self pay. I'm from Alberta, Canada. I'm one of those "Type A", "always be prepared", "most organized in class", kind of person. I do my research and apply what I've learned to make decisions. So, I have my pre-op diet (I've had it for months), and have been studying it ruthlessly over the last few weeks, trying to get the right Protein powders, buying my favourite flavours of Jello, preparing my husband on how he can help me cook food, etc, and reading multiple posts here on bariatricpal.com. Getting more and more nervous/anxious/excited as the days keep trucking along. Having mini "food funerals" along the way...while trying to develop better habits before going into surgery - drinking more Water, get more walking in being a couple of them.

My pre-op diet is specific about when to start the diet/how long to be on the diet, and then when to start liquid diet based on your BMI. Trouble is, while I have gained weight since, I used to see a personal trainer who was trained to measure body fat percentage the old fashioned way, with the callipers and the millimeters.... at the time, her measurements were about 10 points or more below what my fancy Fitbit scale or the online calculators told me.

My question is.... for pre-op diet reasons... do you believe the scale's reading or maybe drop some points off it? Do you use the well published chart that's based on height, weight and age? do you trust the online calculators?

Any pre-op advice?

Online BMI calculator should be fine. I had a bmi of 44 and had a 2 week pre-op diet.

To be safe I would start my pre-op based on the highest BMI not the lowest just to be safe.