Following excerpt from an article published in the Sydney Morning Herald website on 19 Nov 2010:

Researchers from Melbourne University presented a paper at the 5th Australian Health and Medical Research Congress showing how a diet high in sugar can cause health damage even when a person is not overweight. Signs of impaired heart functioning were seen in mice that were fed a sugar-rich for just 12 weeks.

The mice ate the equivalent of a high-sugar diet for humans - for example a teenager fuelled by soft drinks and lollies - and the damage was seen to unfold even though they maintained a normal weight.

PhD candidate Kimberley Mellor said the results pointed to commonly held misconceptions about healthy eating, and an "overlooked" potential driver in the steady rise of type 2 diabetes.