Directly from the link:
"Plus, the extract the researchers used was not like the sulforaphane supplements available at your local health food store.
"The way that you produce and process the extract is important to keep the sulforaphane intact," said senior researcher Dr. Anders Rosengren, of the University of Gothenburg, in Sweden.
He said his team used a highly concentrated supplement that was tested for purity and side effects.
"At this point," Rosengren said, "we cannot recommend that anyone take the currently available extracts on the market to treat type 2 diabetes."