Hyaluronic Acid gives skin volume by holding onto water and as levels decline with age, the skin loses its youthful fullness. This significant ingredients helps lock in moisture for skin hydration, improves elasticity, and helps reverse free radical damage. HA provides the hydrating, nutrient-transporting framework necessary for holding up the structure of the ECM in the skin. If elastin is not bathed in water it becomes dry and brittle, invariably leading to dull, loose and less-elastic skin. Dry skin is aged skin.
HA comes in a variety of "weights". Low molecular weight hyaluronic acid is NOT hyaluronic acid. The properties of hyaluronic acid depend on its molecular weight. In fact, if you make a solution of hyaluronic acid without the addition of preservative, it will be initially very viscous but, after a few days, it will be a liquid instead of a gel. Why? Because microorganisms degrade hyaluronic acid into smaller pieces (low molecular weight) and those fragments do not form a gel and will not prevent water loss from the skin. Moreover, fragments of hyaluronic acid have been shown to promote inflammation.
Hyaluronic acid (a.k.a. hyaluronan, sodium hyaluronate) is a polysaccharide, made by animals and some bacteria. We use the cruelty free version of Hydrolyzed HA, produced by bacterial fermentation, with long chains made of N-acetyl-D-glucosamine alternating with glucuronic acid. Our HA is 300kda which is a low enough molecular weight to be readily absorbed, but high enough not to cause an inflammatory response. In our skin, it stabilizes the intercellular (in-between cells) space in the dermis, and contributes significantly to cell proliferation, migration, and skin repair; activities essential to skin health.