The Mr Olympia competition does not currently have a policy banning the use of steroids, however, many people feel that this should change.
There are a number of reasons why steroids should not be allowed in bodybuilding competitions like Mr Olympia. Firstly, they provide an unfair advantage to those who use them. Secondly, they can be dangerous to the health of those who take them.
And finally, their use goes against the spirit of fair competition. Many professional bodybuilders have spoken out against the use of steroids in competition, including a one-time Mr Olympia himself, Ronnie Coleman.