Lyoto Machida says he didn't know substance was banned, because USADA failed to educate properly

Lyoto Machida is a man known to carefully choose his words. So on the rare occasion the former UFC light heavyweight champion issues a strong opinion in public, it's going to garner attention.
Several days after learning that he has been suspended 18 months by USADA for taking the banned substance 7-keto-dehydroepiandrosterone (DHEA) prior to a scheduled April fight with Dan Henderson, Machida is still upset with his penalty.
In his first interview since he was first flagged for the violation, M