D-Galactose ana amfani dashi sosai a cikin masana'antar harhada magunguna, abinci da kayan kwalliya.A cikin masana'antar harhada magunguna, ana yawan amfani da shi azaman abin haɓakawa a cikin nau'ikan magunguna daban-daban kuma azaman sinadari a cikin kafofin watsa labarai na al'adar tantanin halitta.An san shi don iyawarta don haɓaka kwanciyar hankali da inganta haɓakar kayan aikin magunguna masu aiki.Bugu da ƙari, ana amfani da D-galactose a cikin dakunan gwaje-gwaje don nazarin haɓakar ƙwayoyin cuta, metabolism, da tafiyar matakai na glycosylation.
A cikin masana'antar abinci, ana iya amfani da D-galactose azaman mai zaki na halitta da haɓaka dandano.Ana amfani da shi wajen samar da kayan zaki, abubuwan sha da kayan kiwo.Zaƙi na musamman, haɗe tare da ƙananan adadin kuzari, ya sa ya zama madaidaicin madadin waɗanda ke buƙatar madadin sukari.Bugu da ƙari, an gano D-galactose yana da kaddarorin prebiotic waɗanda ke haɓaka haɓakar ƙwayoyin cuta masu fa'ida da tallafawa lafiyar narkewa.