Green Lipped Mussels used in GLX3 do not contain antibiotics, nor GMO ingredients. The aquaculture methods used in New Zealand for Green Lipped Mussels differ dramatically from those used in farm raised catfish and salmon. They are not “fed” anything by man. They are filter feeders of phytoplankton that occur naturally in the exceptionally clean waters off New Zealand. They are not raised in the kind of closed environment of many fish farms. A google search will confirm this. Search “antibiotics AND green lipped mussel” and you will come up with zero related articles. Do the same with “antibiotics AND salmon” and you will find a lot of scary results.