It has to do with WADA, which seeks to inhibit all drug use in sports, the Olympics in particular but not limited to them.
Unfortunately, the scope of WADA's objectives extends far beyond sports. Here's something I've previously written that touches on this topic:
"WADA has explicitly stated their desire for ALL national governments to criminalize the personal use of anabolic steroids and other performance enhancing drugs as defined in the WADA code – for athletes and non-athletes alike.
"The UNESCO International Convention against Doping in Sport has a stated objective of criminalizing personal non-medical steroid use by applying the force of international law behind the anti-doping WADA code. The Convention also calls for increased regulation of dietary supplement (ideally to be compliant with the WADA Prohibited List).
"The biggest problems caused by using the WADA code as the basis for international law is the fact that the overwhelming majority of dietary/sports nutrition supplement users and non-medical steroid users are NOT athletes. They are simply ordinary responsible, law-abiding adults who use these substances as a tool to feel better, to increase muscle size and strength, to reduce bodyfat, and/or to enhance physical attractiveness.
"If WADA succeeds in the moralization of international laws related to dietary supplements and performance-enhancing substances, we may soon see laws that mirror the moralistic WADA Code. Non-athletes will be they ones that suffer while doping in sport continues unfettered."
"The UNESCO International Convention against Doping in Sport has a stated objective of criminalizing personal non-medical steroid use by applying the force of international law behind the anti-doping WADA code. The Convention also calls for increased regulation of dietary supplement (ideally to be compliant with the WADA Prohibited List).
"The biggest problems caused by using the WADA code as the basis for international law is the fact that the overwhelming majority of dietary/sports nutrition supplement users and non-medical steroid users are NOT athletes. They are simply ordinary responsible, law-abiding adults who use these substances as a tool to feel better, to increase muscle size and strength, to reduce bodyfat, and/or to enhance physical attractiveness.
"If WADA succeeds in the moralization of international laws related to dietary supplements and performance-enhancing substances, we may soon see laws that mirror the moralistic WADA Code. Non-athletes will be they ones that suffer while doping in sport continues unfettered."
Source: Why Ordinary People Should Fear the World Anti-Doping Agency