>the covalent attachment of a sugar to a protein or lipid. Typical sugars that participate in glycation are glucose, fructose, and their derivatives. Glycation is the non-enzymatic process responsible for many complications in diabetes mellitus and is implicated in some diseases and in aging.

Fructose creates 20X more glycation end products than glucose, which causes extra protein crosslinks and stiffening of the extracellular matrix and the loss of elasticity in the skin. Honey, tablesugar, and fruits should be limited. This is exactly the reason why alot of vegans who go crazy on fruit end up looking so aged.