Antihyaluronidase is a substance that inhibits the enzyme hyaluronidase, which breaks down hyaluronic acid in the extracellular matrix. By blocking this enzyme, antihyaluronidase can help maintain tissue hydration, support cellular structure, and potentially enhance the effectiveness of certain therapies, such as those involving dermal fillers. It is sometimes used in medical and cosmetic applications to improve skin elasticity and reduce the effects of aging.