1.   But the booming business in so-called performance enhancers such as androstenedione and creatine is occurring amid conflicting claims about their effectiveness and safety.

2.   But the EAS flap is about performance enhancers, not clothing.

3.   Considered a performance enhancer, it was a tool for both work and play.

4.   EPO is a significant performance enhancer for endurance athletes, such as five Tour de France bicyclists who recently disqualified themselves by admitting use of the banned substance.

5.   However, it has been a virtually undetectable performance enhancer used by endurance athletes from cyclists to cross country skiers.

6.   If the laboratory can rule out drugs as performance enhancers, the state may choose to add them to the short list of accepted drugs.

7.   In such a great year for stocks, there would seem to be few reasons for fund managers to use any artificial performance enhancers.

8.   Synacthene is banned as a performance enhancer but is legal when used as a curative agent under medical control.

9.   The sport has no rules on performance enhancers.

10.   Their promotion for use as sports performance enhancers has made them the pills of choice for everyone from weekend warriors to high school athletes.