How much time will it take to lose excess weight after weight-loss surgery?

Depends: Interesting question! it depends on the type of surgery you had. Typically, less aggressive modalities, such as lap band will produce gradual weight loss (a few lbs/week) and the band will/might need to be adjusted periodically. Roux en y and other more radical methods may cause substantial weight loss over a short period of time (1-3 months).

6-12 months: Most sleeve patients will lose their weight (70% of excess wt) in 6 months. Most bypass patients will lose their weight (75-80% of excess weight) over 12 months. Band patients lose about 50% of excess weight over 2 yrs.

Weight loss: Depends on how much you change your lifestyle.