There are specific diets for weight loss according to blood type, but like many other diets, none have been conclusively proven to work. There is no magic bullet for weight loss.
Energy intake < energy expenditure = weight loss.
Many fat loss diets work, but only in the short term. Weight Watchers and Jenny Craig are two examples, but the best way to lose weight is through diet and exercise.
There are many diets for quick weight loss. Before doing something like this you must consult with your doctor to be sure your health can handle a change. I believe if you watch what you eat and work out you can lose weight quickly.
No, crash diets are terrible. Crash diets are unhealthy and can really hurt you if you are not careful. You should reach weight loss goals at a reasonable pace.
I don't have a lot of experience with e-Diets. I personally think that Weight Watchers is the best online weight loss program out there and it is worth taking a look at it.
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/
There are a variety of weight loss diets and work plans out there, and different plans work well for different people. The best thing to do is just to experiment and find something that works.
A search online reveals that the website of ConsumerSearch, Inc., a part of The New York Times Company seems to have unbiased reviews about weight loss diets and programs; please visit the link-http://www.consumersearch.com/weight-loss-programs, where you can compare diets for weight loss based on the reviews contained therein.
You may take a look at www.webmd.com/vitamins-and...11/diet-weight-loss-supplements, women.webmd.com/pharmacist-11/rapid-weight-loss, www.menshealth.com/mhlists/how_to_lose_weight/index.php
Unfortunately, none of the "fast weight loss diets" work. The formula for weight loss is very standard. To lose one pound, you must either expend 3500 calories with exercise, or eat 3500 calories less or some combination thereof.
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.