Convinced that I was fat, I tried slim fast during my teens. It left me hungry, I did loose weight, but I was unhappy and woefully lacking in energy. It doesn't contain all of the things you need for a healthy diet and it did me no good at all.

If you starve yourself and go hungry, your body becomes more cautious about using resources - you change your metabolic rate and it gets that much harder to keep the weight off. Slim fast will get your weight down in the short term, but as soon as you can't stand it any more, the pounds will pile back on.

Don't do this to yourself. Really don't do these diets, they aren't good for you and none of them ever work that well long term. Eat carefully, try to get a balance, but get some exersize. Find something active you like, and do it - it makes way more difference to your size than what you eat, and its better for you. Slim fast is not a good thing. Don't be fooled into trying it.