The computer-implemented fragrance or flavour composition method (300), comprises:



a step (305) of defining, upon a computer interface, a value representative of a sustainability impact digital index or of an aggregate sustainability impact digital indicator validity threshold for at least one fragrance or flavour ingredient in the fragrance or flavour composition, said fragrance or flavour ingredient being associated to a fragrance or flavour ingredient digital identifier, or to a fragrance or flavour composition digital identifier,
a step (310) of selecting, upon a computer interface, at least one fragrance or flavour ingredient digital identifier,
a step (315) of retrieval, by a computing device, from a fragrance or flavour ingredient physical parameter database of a sustainability impact digital index or of an aggregate sustainability impact digital indicator as a function of at least one said fragrance or flavour ingredient digital identifier,
a step (320) of comparing, by a computing device, as a function of at least one selected fragrance or flavour ingredient digital identifier, a sustainability impact digital index or of an aggregate sustainability impact digital indicator retrieved to the validity threshold defined and
a step (325) of providing, upon a computer interface, an indicator representative of the result of the step of comparing.