I'm with you all it's the unknown. I am in my preop phase now day 7, my surgery is July 7th but so far I love drinking Fairlife. I bought the bariatric fusion but it's the same as Fairlife except I have to mix it. To be honest I was not getting enough calories thus far because I use almond unsweetened milk so didn't add up to enough in Day so I increases to 5 shakes a day to get at least 850-900 calories. I've been reading alot and trying to prepare dinners for family and with mine I puree. I bought 1 oz icecube trays and froze. So it's convenient. I love Dr Voung on you tube hes a bariatric surgeon he helps with alot of questions.