Yeah as ausgirl says, the fibre is the good stuff. That's why I want to do it in the Thermomix - throw in the veggies and fruit and nothing is wasted.

There's a really great blog post on this, by Jo from Quirky Cooking. She explains how they are still healthy and not just a massive influx of fructose.

I'll see if I can find it. Edit: can't add it, but if you google Quirky Cooking, it's her most recent blog post.