If we have not taken care of the cleavage skin, in our forties it can look significantly older than the face, most often due to poor sleeping conditions and excessive sun exposure without adequate protection. Hyaluronic acid is the basis of the skin that shrinks with age, and is found in moisturizers, giving the skin much-needed volume and eliminating years of carelessness. It should be noted that hand skin is exposed as well as cleavage skin, so you can apply the same care products to both areas.