Oxidative stress plays a central role in initiating and driving events that cause skin aging at the cellular level (Masaki 2010).
It is known that a primary causes of Oxidative stress is pollution, UV exposure, glucose levels, hormones, and (of course) stress.
Sugar stimulates an ageing process called glycation. When collagen comes in contact with sugar it results in the formation of advanced glycation end products. This is a natural process, however it is accelerated by a high sugar diet. Glucose-driven ageing can accelerate the ageing process leading to premature ageing and decreased skin function.