Vegan athletes tend to have lower creatine stores than athletes who eat meat.

CNN: Will eating meat help recovery after long runs?

The 33-year-old baggage handler had been taking MaHuang extract, caffeine and ephedrine extract, combined with large quantities of creatine.

BBC: 'Energy pills' linked to stroke

Hopper recently pled guilty of smuggling in alcohol, tobacco and creatine (for muscle building) to inmates in exchange for payments.

FORBES: Federal Prison Guard Pleads Guilty To Selling Contraband

Creatine has become popular among athletes tempted by claims that it can increase power without the side-effects associated with anobolic steroids.

BBC: 'Energy pills' linked to stroke

Athletes are also barred from human growth hormone, which reputably helps with injury recovery, but they have free use of muscle-building creatine.

FORBES: Why It's Time To Legalize Steroids In Professional Sports

Red meat (and white meat) are also sources of natural creatine.

CNN: Will eating meat help recovery after long runs?

Creatine assists with recovery from repeated hard exercise.

CNN: Will eating meat help recovery after long runs?