Losing weight in a week is not impossible and you can find many programs that can help you to get rid a couple of pounds in a week, but in this case I'm pretty sure that you are looking for 'significant' loss, not just 1-2 pounds. Usually it is not recommended to lose weight in such pace, but I'm sure you have your own reasons.

It is clearly impossible to do it with a standard healthy diet (it may takes months) or even recent dieting technique such as calorie cycling, they just can't produce result fast enough; but here's a 60 years old program that allow you to do it: Master Cleanse Diet.

What is Master Cleanse and how it can answer the question "how to lose weight in a week"?

Master Cleanse is a fasting and detoxification system that involves drinking a blend of lemon juice, maple syrup, cayenne pepper, and water for a period of time. The original aim is to cleanse your body from harmful toxins, but due to the absolute restriction of solid food, the user can also gain rapid weight loss.

Master Cleanse diet duration is last for 10 days, but once the cleansing effect start to kicks in, you will have really fast weight loss (some of the users even report two pounds loss per day).

The problem is this program will cause many side effects like hunger, head ache, and other discomforts; these side effects have made a lot of dieters that try Master Cleanse can’t even undergo the first three days. That is the reason why most people under 'normal' circumstance will choose standard diet with well designed meal plans and exercises.

So, how can you manage to do it when most of other dieters fail?

If you really have solid reasons to lose weight in a week, now is the time to prove your resolution to have it. Now, don’t worry, while willpower is important, I will not tell you to rely solely on it.

Here's an easier way: read a guide that written by Raylen Sterling about tips and tricks to carry out this diet. Raylen has many years of experience in using Master Cleanse Diet and in his guide, you can find how he made little adjustment to make the diet easier without reducing the result.