Published in 2009 this review examined the many active constituents in broccoli and their physiological benefits. Notably it discusses the role of sulphoraphane in detoxification pathways and differentiates the benefits of pure extracts of bio actives vs whole food extracts of broccoli.
Jeffery, E.H., Araya, M. Physiological effects of broccoli consumption. Phytochem Rev 8, 283–298 (2009). https://doi.org/10.1007/s11101-008-9106-4