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Patent Pending Hyaluronan /haɪˈæljʊrənən/ (also called hyaluronic acid /ˌhaɪəl.jʊˈrɒnɨk/, hyaluronate /ˌhaɪəlˈjʊərəneɪt/ or /ˌhaɪəˈlʊərəneɪt/, or HA) is an anionic, nonsulfated glycosaminoglycan distributed widely throughout connective, epithelial, and neural tissues. It is unique among glycosaminoglycans in that it is nonsulfated, forms in the plasma membrane instead of the Golgi, and can be very large, with its molecular weight often reaching the millions.