Condroitin and Nitric Oxide?

Condroitin supposedly helps to restore cartilage and "reducing the concentrations of... nitric oxide" (http://www.orthosupersite.com/view.asp?rID=16710). It is my understanding that many bodybuilding supplements promote nitric oxide. Can someone explain to me the relation: is nitric oxide destructive on cartilage or is the swelling it causes? Will taking condroitin inhibit supplements such as Nitrix, No.. etc... ?
 
And if anyone has any suggestions for cartilage it would be great.

Age: 18       Weigt: 182
Torn Meniscus (twice) sucks.
Power Clean: 265lbs not sure how much this is since knee.
Bench: 255lbs 185x10,10,10
Squat: 315lbs, 205x20
Deadlift: 425lbs not sure how much this is since knee