Aging is not the only factor involved in our organs and tissues losing their mechanical properties. Indeed,
some genetic syndromes induce a weakness of elasticity or viscoelasticity
Any oxidizing substance can attack elastic fibers and accelerate their deterioration. UV rays, cigarettes, pollution
(certain nanoparticles in particular) and a poor diet are some of the main toxic agents
Less well known is what some call "caramelization" of the body, due to excess sugar (notably in the context of diabetes)