Well, the calculations that everyone has put forth thus far isn't taking everything into account.  Not only does this pill block the fat and fat calories you consume, but it also makes your body use some of its stored fat for energy because it's being deprived of the fat that the pill is blocking.  This means you can't just calculate the fat blocked when trying to figure out how much weight you should lose.  The 50% increase in weight loss can not be worked out in solid numbers because results will differ from person to person and there is no way of knowing exactly how much stored body fat will be burned.  Also, people are on different diets, exercise plans and will have different metabolisms.  I'm assuming GSK did sample testing where they'd have a group of people on alli and a group of people on a placebo.  They put them on the same diet and exercise plan and then compared the weight loss between the two groups.  Some people may have only had a 20% increase in weight loss, some 25% and some 50%.  It would have been nice if they would show some of the data and possibly provide us with an average percentage of increased weight loss, but as far as I know there isn't a solid formula to figure out the exact percentage increase in weight loss, there are simply too many variables. 

Hi Heather,

I am so sorry, the answer is not coming clear...maybe I am not understanding your question correctly.  But let me try to give it another try.

First, alli is not a miracle pill or a quick fix. Lots of other weight loss products promise results overnight. But alli is based on good things like hard work, smart choices, and gradual weight loss. Second, alli is a unique combination of a pill and a plan to help you lose more weight than dieting alone. With that said, I want to let you know that the alli plan was created based on the USDA dietary Guidelines - calories from fat 20 to 35%, calories form carbohydrates 45 to 65 %, and calories from protein 10 to 35%, and The American Heart Association guidelines - low sodium., low saturated and trans fats, etc.

Let's go over this sample -

When you take 45 grams of fat per day (15 grams x 3) = 405 calories.  This sample is based on a 1500 calorie diet, which = 30% calories from fat.   Those calories are already based on decreasing ~ 250 to 500 calories from your current intake (or 250 from decreasing calories from your foods and 250 burned from exercises), which leads you to lose ~ 1 to 2 pounds per week.  When you add alli to this reduced-calorie, low-fat diet, alli then blocks 3.75 grams of the already low-fat diet, which = additional 112 calories less on top of the 250 to 500 calories already decreased in your meal plan.  Remember that by only taking 100 calories at the end of the day x 365 day = 10 pounds off at the end of the year.  Imagine what you can do with alli, and how you can reach your goal faster, but still allowing for a gradual healthy weight loss.

I hope this helps, but if not, I will be looking for your question tomorrow morning. I really appreciate your feedback and hang in there I am trying to get a handle of the volume of questions posted in the last few weeks.

Thanks for your patience,

Sylvia

Sylvia - where are you getting the 112? 

"When you add alli to this reduced-calorie, low-fat diet, alli then blocks 3.75 grams of the already low-fat diet, which = additional 112 calories less on top of the 250 to 500 calories already decreased in your meal plan."

 
Fat calories are 9 per gram of fat, and based on my calculation, you are giving 1 g of fat 29+ cal.  Is there something else I'm missing or not understanding?