   The buzz  We all know too much sweet stuff is bad for dental
health and the waistline. But is consuming too much refined
sugar as ageing as too much sun exposure? In recent years,
nutritionists and dermatologists alike have warned about refined
sugar and its effect on the skin. But is there any evidence to
support this?  What else?  Thanks to decades of public campaigns
about sun awareness, most people know too much exposure to
ultraviolet radiation is bad for us, leading to premature ageing
and, potentially, skin cancer. There is less knowledge about the
effect of our diet on our skin.  Sydney nutritionist and author
Michele Chevalley Hedge says consuming too much refined sugar
causes harmful molecules to form in our body. They are called
advanced glycation end products (AGEs) and they damage collagen
and elastin. Antioxidants, which can help keep skin looking
healthy, are also reduced by too much refined sugar in the diet.
Hedge is particularly concerned about the amount of "hidden"
sugar in the Australi