With all the advances in oral hygiene – maximum whitening, sensitivity relief, etc. – complex toothpastes can sometimes feel like you’re brushing with teflon. Simpler is perhaps better. This toothpaste by OFFICINA PROFUMO FARMACEUTICA DI SANTA MARIA NOVELLA is all-natural and contains the stain preventative iris powder. It was originally used by the Dominican monks of the Santa Maria Novella in Florence, the basilica from where the brand derives its name.