Basically he breaks sugar into good sugars (mostly glucose) and bad sugars (mostly fructose).
That doesn't sound quite right???
Fructose is the natural sugars you find in things like fruit. Glucose is the sugar which is derived from things - ie, your white sugar, etc - which are added to processed foods (along with surcrose).

To me it would make more sense to avoid the glucose and surcrose and try to make sure any sugar intake consists of those healthier sugars like fructose.