Wrinkles are due, among other things, to a decrease in the level of collagen, the true pillar of support for the skin, in the dermis. This is why deep lines appear on the face. The loss of firmness is due to a lack of elastin in the dermis with the passing of time: skin is less toned, has less elasticity and starts to sag. An anti-wrinkle cream will soften wrinkles, a firming product will combat skin sagging which is responsible for the collapse of facial features.