Hi Kee, welcome to Minis. Once you have your op date through it is common for people having bariatric surgery to be asked to do a pre-op diet for either 1 or 2 weeks beforehand to shrink the liver down. This is nothing to do with if your liver is enlarged usually or not, it is simply to do with making the operation easier, as during the keyhole surgery the surgeon has better access to your tummy the smaller your liver is, hence the need to shrink it before surgery!! Hope this helps - I have not heard of anyone on this forum not being asked to do a pre-op diet of some kind. Good luck with your consultations x