The injunction is also binding on any other company participating with Muscle Marketing.
The case between Degussa and Muscle Marketing has been running for nearly two years in the US district court of California, after Degussa identified what it called scientifically false and deceptive claims made by the other company.
These claims stated that creatine serum is more effective than creatine powder. To back its stance, Degussa commissioned a study released last year which found that creatine serum supplements had no apparent effect on muscle ATP or creatine stores. Muscle Marketing then hit back, claiming that all forms of creatine powder, such as that made by Degussa, were ineffective.
However these claims were stricken by the Los Angeles court at the end of last year. The injunction, filed last week, orders Muscle Marketing and its officers to withdraw and cancel all statements, articles and advertising referring in any way to creatine powder products, including their safety and efficacy.
It has also been banned from comparing its creatine serum products with any creatine powder products, including Degussa's Creapure creatine monohydrate powder.
A review by ConsumerLab last year suggests that many of the liquid, effervescent and chewable forms of creatine on the market may be ineffective and of poor quality.