UVitamin D ukhiqizwa ngumzimba ekuphenduleni ukuvezwa kwesikhumba elangeni, yize itholakala ngokudla okuthile, kufaka phakathi inhlanzi, uwoyela wesibindi senhlanzi, izikhupha zamaqanda, imikhiqizo yobisi, nokusanhlamvu okuqinisiwe.
Kubalulekile emathanjeni aqinile, ngoba isiza umzimba ukusebenzisa i-calcium ekudleni. Lapho kwenziwa ucwaningo oluningi, buhlala buningi ubufakazi ukubaluleka kukavithamini D ukuhlala uphilile.
Ubuhlungu bamathambo nobuthakathaka bemisipha kungasho ukuthi uphethwe yivithamini D. Kodwa-ke, ezimweni eziningi izimpawu zicashile futhi nale nkinga ingenzeka ngaphandle komzimba ungakhombisi zimpawu. Kungenxa yalesi sizathu ukuthi ukubuyekezwa nokuhlaziywa ngezikhathi ezithile kubaluleke kakhulu. Indlela enembe kunazo zonke yokukala inani levithamini D ekhona emzimbeni ukuhlolwa kwegazi kwe-25-hydroxyvitamin D. Uma unenkinga, udokotela wakho uzokunikeza ukwelashwa acabanga ukuthi kulula kakhulu.
Amazinga egazi aphansi kavithamini D ahlotshaniswa nesifo senhliziyo, ukukhubazeka kwengqondo (kubantu asebekhulile), i-asthma enamandla (ezinganeni), nomdlavuza. Ucwaningo luphakamisa nokuthi lesi sithako singabamba iqhaza ekuvikeleni nasekwelapheni izimo eziningi ezahlukahlukene, kufaka phakathi uhlobo 1 nohlobo 2 sikashukela, umfutho wegazi ophakeme, ukungabekezelelani kweglucose kanye ne-multiple sclerosis.
Le nkinga ingabangelwa izizathu ezahlukahlukene: ukudla okungekho ku-vitamin D, ukutholakala okulinganiselwe elangeni, izinso ezingakwazi ukuguqula i-vitamin D ibe yimo esebenzayo, uhlelo lokugaya ukudla olungakwazi ukulungenisa kahle, nokukhuluphala.