Collagen and elastin are the structure of the skin that maintains both elasticity and firmness. Fibroblast cells create both collagen and elastin matrix that can be activated by glycolic acid and other peels.The special fibroblast cells are found in the papillary level of the second layer of the skin (dermis).ollagen and elastin are fibers that make up the supporting structure of the skin. Collagen gives skin its firmness while elastin keeps skin tight. Both of these fibers are plentiful in young skin and start to break down with natural aging and as a result of sun exposure.