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.
In general, most diets will only work if one cuts down on calories and combines it with exercise. Fast diets will be the same. Those who follow it swear by it, but results will vary.
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.
Many diets are fast, but 340 is a lot. I would recommend to get professional help whether medically or athletically, from surgeries to work out camps they can help you out.
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.
The best diets that work the good and last a long time are the ones that you can stick to for a lifetime. That is healthy eating and exercise. But for fad diets you could try a cleanse diet, those you lose weight fast but it won't stay off in the long run with out changing your habits.
One site that has a lot of information is www.getfitgetright.org. Slim fast is another good diet that offers the potential to lose seven pounds in seven days.
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.
Of the many diets out there, there are certainly some that are more popular and effective than others. Of the most popular are slim fast, Atkins and weight watchers. All have proven to be extremely effective and with a lot of support whether it be in person or on line.
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.
As with all diets, fasting diets have both risks and benefits. There are many religions that fast and they are healthy. Keeping the weight off after fasting is the trick.
Both fast food diets and tobacco usage are dangerous. They will have long-term effects on the health and well being of the body.
Diets would need to be followed on a daily basis. Which means it is also a life style change. If you can follow a diet and change your life style to fit the diet, it should work for the long term.