Cov khoom siv tshuaj xyuas vitamin D (colloidal kub) yog tsim rau kev tshawb nrhiav ib nrab ntawm cov vitamin D hauv tib neeg cov ntshav venous, ntshav, ntshav ntshav lossis cov ntshav peripheral, thiab tuaj yeem siv los tshuaj xyuas cov neeg mob rau vitamin D tsis txaus.