I'm not absolutely sure if it clears the furball problem for us or not, but she loves it as a daily treat and it's certainly not doing her any harm. We've taken various measures to address the GI problems (lactulose and special food), and use this as part of the regimen.
My cat does not particularly like the taste of this pasta malt, so I offer it to him in small doses directly from the tube, a couple of times a day! Until now (the kitten is 4 months old) no resurgence of fur! I am satisfied!