Cylindrospermopsin: Water-linked potential threat to human health in Europe

► Cylindrospermopsin (CYN) is a secondary metabolite produced by several Cyanobacteria species. ► CYN can have wide adverse effect on human health. ► CYN neuro- and immunotoxicity and cancer promotion is still not well-known. ► Eutrophication and climate change can accelerate expansion of CYN producers in Europe. ► Cyanobacteria in surface waters should be a subject to regular control monitoring.