Sodium hyaluronate is the sodium salt of hyaluronic acid. It is synthesized to create a smaller molecular structure for stability and increased resistance to oxidation. Its smaller molecular structure and water solubility means that it can penetrate deeper into skin, providing intense hydration beyond the skin’s surface. sodium hyaluronate is more bioavailable-meaning skin more readily absorbs it than hyaluronic acid. Both hyaluronic acid and sodium hyaluronate are available in different molecular weights for multi-level results (lower molecular weight can penetrate deeper into skin’s layers, where higher weights deliver immediate results on the surface).