01:43 - Source: CNN
Deer antler spray gives athletes an edge

Pro golfer Vijay Singh has admitted to using “deer antler spray,” a substance meant to enhance athletic performance that is advertised as containing a hormone called “IGF one.”

The performing enhancing substance, which is banned by both the PGA tour and the World Anti-Doping Agency, has been linked to the Ravens player Ray Lewis and the Alex Rodriguez scandal in reports this week.

In a statement, Singh admits to using the spray, but says that “at no time was [he] aware that it may contain a substance that is banned under the PGA tour anti-doping policy.”

CNN’s senior medical correspondent Elizabeth Cohen explains what the substance is and how it’s used by athletes on Starting Point this morning.