You might have to look online depending on what's available in your area but definitely check your local health food stores first. I think liquid Bentonite is the best to use. I got some called Inno-Vite from a local health store. The psyllium husks I got (used to use powder but it takes so awful it makes me gag. I find the husks are way better since they only have a slightly nutty flavour) are locally and organically grown where I live. If you live in or near a farming community with organic farmers that can definitely help. The nearer the stuff is to you the better. But if you’re in the city you can’t be as picky.