A few days after I got a water purifier with a Fluoride filter. Reality just popped like I had bought a new TV. Colors got brighter and more vibrant. The taste between tap water and purified water is night and day. I did a taste test and after I had tested the purified water. I spat out the tap water on instinct like I had gotten poison in my mouth. Coffee brewed with pure water is a completely different thing.

I always thought it was some hippie myth.