I've just lost 15 kilos and have a bit more I would like to lose. I've achieved this by working with a great nutritionist and to be honest, I think this is the most beneficial way of approaching weight control. It's been a bit of an education, a lot of what I was eating before appeared healthy, but was high on the glycemic index. The changes I made were more long term lifestyle changes rather than a 'diet'. Changing to a low GI diet has worked wonders for my own situation.
A note on fruit, it was recommended that I eat more veggies than fruit. Fruit does have natural sugars, and these do contribute to blood sugar levels (as sad as that is, being that my father in law is a cherry and raspberry farmer!). Also, I'm only allowed juice (which I love) on a very restricted basis. Juice servings can have around six serves of fruit in it, so blows the daily allowance pretty much by double

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There was an article recently, I think in The Age, which rated the efficacy of diets which were fads in 2014. The Paleo diet scored really badly, both for its effectiveness, as well as ease of implementation into current lifestyles. Even a particular brand of diet shake was scored much more highly than the paleo diet. Wish I could remember who conducted the study!