ALDH1A1 and colorectal cancer: Research regarding watercress (rich in phenethyl isothiocyanate) and broccoli (containing sulforaphane, 3-butenyl isothiocyanate) extracts have revealed positive outcomes on colorectal cancer stem cells, through decreased viability, decreased ALDH1 activity, increased cyclin A2 levels (which negatively influence cell motility and metastasis), and the down-regulation of CDH1, vimentin, and Wnt/β-catenin [256].