Still no responses, was curious myself I've seen a mixture of comments out there and have hesitated to use this myself since it's not clear if this would be 'safe' for crops/humans though I suspect it is fine. I've also seen the 'clarifier' stuff which looks to be a barley extract.
Definitely any source for 'zymes that isn't ass rape like the hydro market offers is worth pursuing. I'm currently using a SIP with living soil so I just gave it a big dash of freshly ground malted barley and an activated EM water in. So hopefully that helps a bit.