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High-molecular-weight-HA Sodium Hyaluronate is the salt form of Hyaluronic Acid . High-molecular-weight-HA (>500 kDa) is an excellent surface hydrator, skin protectant, that can hold up to 1,000 times its own weight in water. It can act as an osmotic pump helping water-soluble actives to penetrate deeper into the skin. Smoothes the skin, boosts the tissue regeneration without scarring, prevents oxygen free radical damage.