The skin is the largest organ in the body comprising about 15% of the body weight. Roughly 50% of the Hyaluronic Acid in our body is found in the skin. Hyaluronic Acid and Collagen are vital to maintaining the skins layers and structure. It is the collagen that gives the skin its firmness but it is the HA that nourishes and hydrates the collagen. Imagine the collagen as the stretchy fibers that restore the skin back to shape when stretched. Collagen is like a rubber band but stretch that rubber band a million times, like what we do with our skin and without any moisture. Eventually that rubber band gets over stretched (saggy) and dried out and will most likely break. This is much the same way the collagen in our skin reacts leaving our skin dry and wrinkled. Now imagine that same rubber band stretched a million times while under water the whole time. Chances of that rubber band drying out and breaking are minimal. Consider the Hyaluronic Acid as the water that keeps the collagen moist and elastic. Collagen is continuously surrounded and nourished by the gelatinous HA substance. Young skin is smooth and highly elastic because it contains high concentrations of Hyaluronic Acid, which helps skin stay healthy. As we grow older, the body loses its ability to maintain this same concentration in the skin. With decreasing levels of HA in the skin, so goes the ability of the skin to hold water. The result, the skin becomes drier and loses its ability to restore itself. Hyaluronic acid acts as a space filler by binding to water and thus keeping the skin wrinkle-free.