Fructuoso was an author, and the
National Library of the Philippines holds a copy of the book he published in 1918 called
The Beliefs and Ceremonies of the Native Doctors or Medicine Men in the Island of Cebu. He began his political career as a municipal councilor of
Mandaue, Cebu. On December 10, 1940, he was elected member of the Cebu provincial board together with
Jose Leyson under the term of Governor
Hilario Abellana. After the war, Cabahug was appointed as the governor of the province of Cebu by then President
Sergio Osmeña. His term started from 1945 until 1946, and his administration was tasked with the immediate concern of restoring the government in the provinces in the post-war era and sharing power with the Philippine Civil Affairs Unit. He encouraged cooperation with the Americans, issued an official advisory against profiteering and criminality, and requested that artesian wells that were owned privately would be open to the public. On May 18, 1959, he was appointed by then
President Carlos P. Garcia as Undersecretary of Foreign Affairs to replace the late
Juan Alcazaren. He took his oath before Garcia with President Osmeña and
Rep. Maximino Noel of Cebu in attendance. He led the country's delegation to the
Colombo Plan held in Singapore. == Later years ==