If you want some peer-reviewed background on why it's smart to cut out sugar and the foods to which it's added by manufacturers, do take a look at 
<a href="http://www.youtube.com/watch?v=dBnniua6-oM" rel="nofollow">http://www.youtube.com/watch?v=dBnniua6-oM</a>  
This is one of the best nutritional videos I've ever seen. There's a chunk of biochemistry in the middle but it's worth watching to the end! Don't miss it and add years to your life.