vitaminize

transitive verb
vi·​ta·​min·​ize | \ ˈvīt-ə-mə-ˌnīz How to pronounce vitaminize (audio) \
variants: also British vitaminise \ ˈvit-​ How to pronounce vitaminise (audio) \
vitaminized also British vitaminised; vitaminizing also British vitaminising

Medical Definition of vitaminize

: to provide or supplement with vitamins vitaminized margarine