Wow, there's clearly more to this than I had considered! I hope to lose around 30kgs, I eat one small meal a day and will usually have one snack, I haven't counted calories nor do I know my MR, I rarely exercise (very sore joints), I have an exocrine disease and some of my meds are renouned for weight gain. I suppose I wonder if moving ahead with the operation will actually help on my circumstances.