Well, I was using the little purple zebutol tabs at one time and they were pretty good. I had purchased them from Labtech. I tried ordering a couple of more bottlesd and they were no where to be found. There 1-800 number was gone. The tabs worked really good, makes me wonder if they worked "to good" and that is why they are gone. Anyways I tried the Zoe Labs liquid Zeb, It was ok, but not like the little purples. I have not tried any of their other products, they sound good.