The original Toothpaste Couto formula was filed in the city of Porto on June 13, 1932, under the name Pasta Medicinal Couto, by pharmacy manager Alberto Ferreira do Couto.

He developed this toothpaste with the help of a stomatologist buddy in order to combat the growing problem of gum retraction. The product's quality has ensured its success to the point where, for older Portuguese people, saying "Paste Couto" is the same as saying "toothpaste." The only heir of the Couto family still controls the little production.