The first time I did that was after the metal was taken out of my teeth! WOW, there were black flecks, indicating heavy metal. Both my husband and I had it done together...he has perfect teeth, not one issue. He had no black flecks, but lots of foamy white stuff. You could see how different we both were, just by the colors and textures of the water...it was shocking!
The last time I had it done about 6 mths ago, there was no black flecks and it mostly revealed liver, gallbladder and kidney detoxing. I need to go back for another one soon and I can't wait to see how it looks bcause I am so much healthier now.