Hyaluronic Acid: Rooster Comb or Fermented?

Hyaluronic acid was historically extracted from rooster combs, an animal source, but most of what is sold today is produced by bacterial fermentation, which is vegan. The label form, sodium hyaluronate, does not reveal the route, so vegan status depends on the source. It is gluten-free. A supplier declaration confirms fermentation versus animal extraction.