Why am I still so hungry at day 11 on optifast?

My hunger subsided about day 4, but is back with a vengeance past 3 days. I space out the optifast throughout the day, add 1 cup of broth at lunch and 1 cup of plain lettuce at dinner. Only water, caffeine-free tea and the occasional sugar-free mint/gum.

Have others been hungry right up until surgery?

It was long time ago, but I still remember i was hungry on Optifast. Optifast I was on had a lot of carbs and sugars per serving. I wan on a liquid diet for 4 weeks, so in week 2-3-4 I used other low carb, higher proteins drinks approved by my center.