What is the pre op bloodwork for? I've already done a bunch of blood work during the 6 month process so I just wondering. I started my liquid diet yesterday and I did cheat I had 4 crackers because I could not get the hunger to go away even with the shakes I hope I didn't ruin it.

After I had my blood work done, they sent me a letter saying there were a couple things that popped up on there. I had very low levels of vitamin B and D so I bought bottles of vitamins the next day. Maybe there wanting to check yours again

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Prior to surgery they cross and match your blood, they check for any other issues that could relate to your surgery. I don't think a few crackers will alter any blood work results, but just try to do your best with your pre-op diet. Good luck! You can do this!!