I have been eating really good since last week. Although, yesterday I had a small brownie and a handful of M&M's. Bad day. I am starting the alli pill today for lunch.

With what I ate yesterday, will I have any treatment effects? Or will it work with what I am eating today? 

 It differs with every body but, I don't think you will have any issues by taking alli today based on what you ate yesterday.

By the way, don't let "yesterday" bother you. We can't do anything about it. And, we all have those days.

Best of luck!

Hi Sktwirler,

Welcome to the board! Alli will work on anything that you eat within one hour of taking it. If you take alli up to one hour before or within one hour after your meal it will excrete 25% of the fat that you consume. This means that it will not have any impact on what you ate the day before.

Let me know if you have any other questions,

Betty Kovacs, MS, RD