You've seen commercials and many ads for some sort of weight loss diet that's being offered and promising you easy and fast results. While they may not be the quickest and easiest ways to lose weight, it is none the less a very effective way to lose weight.
A weight loss diet will focus on your eating habits and will change them to fit in with a healthy habit and will possibly change your eating schedule, and there are also many other factors that can affect what kind of weight loss diet you should follow. One thing that it is not designed to do, is to starve you or to force you to eat disgusting and gross tasting foods.
One thing that will determine if a weight loss diet does work or not, is if you stick to the diet or simply give up because you didn't see results overnight. Self control is a huge issue here because many people find it hard to resist a burger for a snack. If you don't have the self control to follow a simple weight loss diet then you need to evaluate how you want to live and if you really want to achieve weight loss or not.
There is no simplistic answer to whether they really do work or not because so many factors are involved that are outside the weight loss diet that include the person themselves. A person needs to be motivated and strong enough to follow the diet if they want to see real results. I do firmly believe they can help you if you put forth the effort into it because it can only give you back what ever you've given it and if you put forth no effort what does it have to give back to you?
I do believe they are not for everyone though. People who don't want to lose weight and are completely happy with who they are, or people who just can't resist giving up greasy non healthy foods and aren't willing to put down a burger for the sake of their health and well being are not recommended to go on a weight loss diet.