Redknapp recently accused Taarabt of being three stone overweight, an allegation that the Moroccan then disputed.
However, the Hoops boss has hinted that there could still be a future for Taarabt at Loftus Road.
"He can still play a part in the future if he gets himself fit," Redknapp told Sky Sports News.
"All I ask people to do every day is come in, train, be thankful for being a professional footballer and work hard.
"God gave him a fantastic talent, I just hope he doesn't waste it. If he's fit and ready to play, he's a great talent."
QPR visit Premier League leaders Chelsea on Saturday.