Cernunos 说:
What the hell is a dunkan diet?
Very basically, a no glucid/fat diet. Only glucid allowed, for quite some times in the diet, are, actually, oats, very few of it. Any other glucids, be they slow or fast, are forbidden. But then, you can eat all the veggies/lean meat/fish you want.
Terribly efficient, but with some drawbacks. Overall lack of energy, agressivity, I also noticed some depressive set of mind and other probable internal destructions due to the total lack of lipides. But dude, going from 102 to 86 the first time I did it was so worth it ^^.
It sounds like the Atkins diet but even more dumb-ass.
If you starve your body of what it needs (your body NEEDS lipids as well as carbs), you'll not only end up damaging your internal organs and preventing your cells from regenerating properly, but as soon as you stop the dumb-ass diet your body will scavenge every bit of fat and every ounce of carb you eat and immediately store it in response to the recent lack.
First, ditch the crash diet ideas.
Second, learn to condition your body not to expect food the very moment it gets hungry. What happens when you satisfy your hunger is that your brain goes REWARD and you get a release of chemicals which tell you you've just done a good thing. This can be one of the reasons why people "comfort eat" -- because the reward centre of the brain is constantly telling you "yes, do more of this". If you really want to lose weight and not suffer any terrible side-effects such as halitosis, dry skin, constant tiredness, etc, then you need will-power, and will-power does not mean reaching for an item of food every time you get a hunger pang.
Third, learn what fats are bad for you. There are so many beneficial fats and oils that can be found in things like nuts and milk and dark chocolate, and other items which send stupid diet people into a panic because OMG THEY HAVE FAT SO THEY MUST MAKE YOU FAT! but a small quantity of these things every day is recommended. Avoid cakes and donuts and for the love of god avoid commercial fruit smoothies, they have so much sugar and so many additives it's ridiculous.
Fourth, learn what carbs are bad for you. Stick to items which have a low glycemic index and therefore release energy slowly. Porridge is a good example. Seeded bread is also good. And research is starting to indicate that although pasta is considered a no-no for low-carb diets, the act of re-heating cold pasta (and also cold potatoes) breaks down the carbohydrate chains within the pasta (and potatoes) changing them from complex starch into a simpler form which is more readily digested by the body.
Fifth, walk vigorously for 20-30 minutes per day. Do this whilst cutting a couple of hundred calories from your diet per day and you'll find you'll 1) lose weight but still feel good, 2) be less hungry because your body releases endorphins when you exercise, 3) be able to make these small changes and MAINTAIN them for a longer period of time, 4) not suffer from immediate "snap back" when you drop the diet resulting in you becoming fatter than ever.
Sixth, if you drink, stop.
Finally, if in doubt, consult a qualified dietician. They'll confirm everything I just told you.