[1][4] He developed an interest in nuclear medicine while at Johns Hopkins, and completed a training course on the field at Oak Ridge.

[6] Through the thyroid clinic, Campos likewise pursued research on whether there was a genetic factor that contributed to endemic goiter.

His findings, as contained in a paper that he published in 1961,[10] proposed that the iodine intake deficiency thought to be the main cause of goiter was just one of the triggering factors of the disease, and that physiology and anatomy proved to be more important considerations as some people were born without the enzyme necessary to take in trace elements such as iodine even if it were present in food and water.

[7] As chairman of the Department of Medicine, Campos began the practice of fielding medical interns for community service in Los Baños, Laguna for one month a year.

Until its closure in 1989, it became the community laboratory of the UP College of Medicine, and it was there that Campos conducted testing on the use of iodized oil for the treatment of goiter.

[12] In addition to his service at the University of the Philippines, Campos was also affiliated with the Emilio Aguinaldo College of Medicine, which he and his family also managed.