There is sense behind the raw food diet.  Raw foods help you to achieve greater results, because they have more nutrients than you might otherwise expect.  It doesn’t make as much sense to some, leading them to cook many of their vegetables.  That is not to say that if you cook them they are completely devoid.  In fact, many of them hold many of their nutrients.  The fact is just that they do lose many of their vitamins, antioxidants, and even fibers if you cook them for too long.  So a quick steaming is best if you are going to use it that way.  Of course, not cooking them at all would be the best possible option. 

You get the greatest nutritional benefits, cleansing benefits, weight loss benefits, and simple energy content if you eat them raw.  This is why so many have chosen the raw food diet and continue to do so, and it is why so many continue to see success.  These will give you the nutrient dense and even negative calorie benefits you need to some degree, and when used with an otherwise healthy diet and exercise program, you can achieve greater results in weight loss and otherwise than you would otherwise.