True: This molecule acts like a sponge in the dermis, capturing water and multiplying its volume a thousand fold. Which is why hyaluronic acid is famous for its plumping, moisturising action. Depending on the molecule's size, it can penetrate the skin's various layers in order to regenerate and restructure them. The smaller the size of the molecule, the deeper it penetrates the skin's tissues. In the dermis, these smaller fragments of hyaluronic acid then stimulate body to produce its version, alongside collagen fibres.