From the producer: 

The bitter S. Maria has been prepared for centuries according to the ancient original formula of the Convent of S. Maria al Monte. The doses and characteristics of the over thirty ingredients are respected with absolute rigor through meticulous control of the herbs and a seasoning and processing period of almost a year and a half. The cold infusion of ground herbs, rhizomes, flowers, roots, bark, seeds, resins and leaves takes about two months and guarantees the extraction of the noble parts of the plants rich in healing properties. To the preparation obtained, after eight months of maturation, alcohol and sugar are added and only after another six months of maturation is a 40% alcohol bitterness obtained, with a full and rounded flavour, famous for the perfect harmony of aromas and great digestive properties which make it unique and inimitable. It is an exceptional, intense and harmonious digestive, decided to be enjoyed straight, exhilarating with ice at the end of the meal, perfect as a coffee corrective.