| Juan S. Salcedo Jr | |
| Office: | 6th Secretary of Health |
| President2: | Elpidio Quirino |
| Termstart2: | December 14, 1950 |
| Termend2: | December 30, 1953 |
| President1: | Ramon Magsaysay |
| Termstart1: | December 30, 1953 |
| Termend1: | May 1954 |
| Predecessor1: | Antonio Villarama |
| Successor1: | Paulino Garcia |
| Birth Date: | September 23, 1904 |
| Alma Mater: | University of the Philippines Manila Columbia University |
| Honorific Suffix: | ONS |
Juan Sanchez Salcedo Jr. (September 23, 1904 – October 20, 1988)[1] was a Filipino physician and scientist who specialized in biochemistry, nutrition and public health.[2] He was secretary of health from 1950 to 1953 and chairman of the National Science Development Board (now reorganized as the Department of Science and Technology) from 1962 to 1970.[3] He was also one of the original board of trustees and incorporators of the Philippine Rural Reconstruction Movement.[4] Following his government service, he became dean of the University of the East Medical College and president of Araneta University.
He is known as the developer of a rice variety fortified with thiamine which helped reduce the cases of beriberi in the Philippines and in other countries.[5]