Never heard of it. I personally don't like fiber products. On page 182 are 3 threads about people using fiber products or Oxypowder /colosan.
Everybody seems to be happy depending on bodytype. Fiber sometimes result in constipation and other people like to see solids and don't like the liquifying products.
I use Oxypowder all the time, it keeps my weight down and that encourages me to even eat more careful and right. And with the liverflushes I use the Epsom Salts to get me even more empty. I do add Seasalt to my food every day so I don't loose minerals.