The sports scientist at the centre of the Essendon supplements scandal, Stephen Dank, says that Essendon players knew exactly what they were given and that if he was approached by another club, he would "do it again".

Speaking on Triple R radio on Sunday morning, Dank said that he did nothing at the club that he didn't have permission to do.

Stephen Dank. Credit:Getty Images

"The immediate answer to that is, yes, I would do it again," he told The Party Show. "Don't forget ... there was nothing that we did that we did not have permission for. There was nothing that we did that no one had any issues with and we certainly didn't do anything that wasn't discussed well throughout the club infrastructure."

Dank said that the players knew exactly what they were given, including things to take home, and that all the substances from the program have "some sort of approval somewhere in the world".