The diet that works fast and is easy is the most common diet. Eating balanced meals and making sure that you excersice on a regular basis. This diet is also healthy for you, unlike some other diets that could cause harm to your health.
You could try the Ornish diet, but many people find low fat diets are hard to follow, and don't usually work very well. I would recommend following a low carb diet to lose weight quickly.
Liquid diets may work in the short run to rid the body of toxins, but this is not a long-term solution. Chances are high that any weight lost on a liquid diet will quickly be regained.
I have heard that a lot of people use the South Beach diet, and the Atkins diets to lose weight quickly. You can check these out at www.atkins.com and www.southbeach.com.
Juice diets for the main part do not work. Check out this site for some basic information on the concepts and how and if they work http://allaboutweightloss.org/weight-loss-diet/no-white-diet/
You can find information about diets that work from magazines or on the Internet. Fitness Magazine is a good magazine you can use for information on diets that work. MyFitnessPal is a good website where you can find out information about diets as well.
Yes there are in fact some diet plans for vegetarians. They are special diets catered to vegetarians and there are some popular diets you can edit to work for a vegetarian.
Some diets that would work fast are called crash diets. This means that you would reduce your calories by only eating a real meal like once a day. You would also exercise more than normal.
One website that offers some specialty diets and compares them is medicine.net. Diets vary from person to person depending on how you pair them with exercise, what your weight loss goal is, and such.
Experts say that blood type diets do not work any better than any other regular diets. They can actually deprive you of some nutrients you need, but with suppliments, they can be equally effective.
Diets aren't for everyone, and different diets can work better for different people than others. Counting calories is one that many have success with.
All diets say that they work and will help you lose weight quickly. They also show some recorded results of those that have tried their diets, meal plans, etc. South beach diet is no different. If you go to the website and read about this diet plan, chances are you are going to come across some results of those that have lost weight.
Strict liquid diets are very difficult to stick to, so try out Kirstie Alley's organic liquid diet. It really does produce some great results.