Not drinking 4 opti a day
There were about 7 of my 14 days on the Opti where I couldn't stomach a fourth one. That happened mostly right at the beginning and right at the end. I would suggest trying for the four because I felt significantly better on the days when I got all of the opti in. My clinic stated that it's important to get all four in to avoid muscle loss-- which can delay healing after the surgery.
My recipe for the opti was pretty simple- I just added cinnamon. It wasn't sickly sweet. Just cinnamon-y. I always blended with a bunch of ice because I was told that heating up the opti does something to it? But I would just listen to your clinic.