... , In iron, copper and other metal ions and ascorbic acid homocystein, etc, the coexistence of reducing oxygen free radicals, ... chondroitin sulfate enzyme decomposition. High molecular weight HA in enzyme, acid, heating conditions, low molecular, also is a kind of ... . For the general merchandise HA, other forms of sodium salt, such as zinc metal salt rarely used. Medicinal HA quality standards. wholesale ...