You should talk to a registered dietician before starting a liquid diet. Since you're looking at a year out I'd focus on eating healthier instead of a liquid diet. I've been on mine for about a week and it's barely tolerable, there's no way I could maintain that for a year.
Depending on your current health and your surgeon's policy they may not require a liquid diet. I'd try to eat healthy/low carb and go with the surgeon's instructions.
I also had major concerns about heartburn as I'm taking daily over the counter meds for it right now but my surgeon convinced me the sleeve is still the best option and that there are solutions in the (in his view) unlikely event that it does become a problem
I'm still working on mine but toothpaste, toothbrush, phone, ereader, wall charger, portable charger, clothes to go home in, face wash stuff, dry shampoo, asthma meds
Also Oct 5th. I'm day 5 of my pre-op diet and it is hard. Only allowed to use Bariatric Advantage shakes. I can blend in certain ingredients (skim milk, frozen fruit, etc) but that's it. I've done optifast before and found the shakes and soups to be pretty good so it was tolerable. These are pretty terrible. But I'm losing weight and I definitely don't want to have to reschedule the surgery so I'm pushing through