Synthesis of chemically modified hyaluronic acid (HA) polymers has enabled the fabrication of hydrogels. such as norbornene-modified HA (NorHA) hydrogels that can provide tunable mechanical properties. However. current protocols for the synthesis of NorHA polymers rely on the use of dimethyl sulfoxide (DMSO). https://parisnaturalfoodes.shop/product-category/magnesium-w-hawthorn-berry/