Is it possible to lose 10 to 25 pounds quickly? Ian K. Smith, M.D., author of Extreme Fat Smash Diet thinks so. Yes, this is the same guy who wrote The Fat Smash Diet, so Extreme Fat Smash Diet is the follow up to his first book.

How does Extreme Fat Smash Diet work? Extreme Fat Smash consists of three segments; each diet segment lasts seven days. Each segment strictly limits your daily calorie intake and what you can eat.

The first segment of Extreme Fat Smash Diet is very low in calories, which is a red flag. You can only consume about 800 to 900 calories per day.

The second segment of Extreme Fat Smash Diet allows a little more food choices, but your daily calorie intake is still low. You have an option of eating a tablespoon of peanut butter and three tablespoons of cottage cheese a day.

Let’s say you have successfully completed the first two segments, but you still have not reached your target weight, what do you do? There is no easy way out. The diet says that you have to continue doing them over and over again until you reach your target weight, which is rather boring and in my opinion counterproductive.

The third segment of Extreme Fat Smash Diet kicks in when you have finally reached your target weight. You are allowed a little more food choices and you have to start exercising; then comes the maintenance phase.

Does Extreme Fat Smash Diet work? Yes, it does work…but so is any other diet that puts you on 800 calories per day. I bet the dropout rate on this diet is very high, because it is not sustainable over time. And where are you going to get the energy for about 1 hour of cardio Smith prescribes?

Should you give Extreme Fat Smash Diet a try? You can probably make this diet work for you. The diet does recommend eating nutrient-dense foods such as vegetables, fruits, and meat. In short, the food choices on this diet are healthy and well thought out.

Follow the diet the way it is described in the book, but I would increase the daily calories to at least 1,200 calories a day and I would also incorporate one “cheat day,” which help prevent what is known as diet fatigue.