According to research Cocamide DEA is on the Proposition 65 list because it can cause cancer. Exposure to cocamide DEA may increase the risk of cancer.
High concentration to of DEA is hazardous to human.
Expert Panel concluded that Cocamide DEA was safe as used in rinse-off products and safe at concentrations of less than or equal to 10% in leave-on products but still I rather lower mine to 1-2%. Or use the alternative Co-surfactant.