This is true. I went into the custom compounding pharmacy by my house and straight out asked the guy there if he could help me with the info on how to measure/mix three different powders together. He did help me and did all his calculations for me. He asked me how I was making my stuff, and I told him. The first thing he said was "what size filter you using?" I said a 45. He said I really need to use the 20, as thats what they use in the pharmacy. Do I use a 20? No, I use a 45. I made so much stuff already, which several people are testing out, and no one got any abcess, infection or anything else, and the juice comes out crystal.