ACO's history is rooted in Sweden and has a deep scientific heritage. The ACO brand dates back to the beginnings of pharmacies and was founded in 1939 by Apotekarsocieteten, which was looking for a way to group its prescriptions under one brand that would also serve as a seal of quality. True to its roots, the name ACO was chosen as an abbreviation for Apotekens Composita, which means "the pharmacy's mixture". Building on this strong foundation, the ACO laboratories were established with strict specifications for product safety.