I-Vitamin D inceda umzimba wakho ukuba ufunxe i-calcium kwaye ugcine amathambo omelele ubomi bakho bonke. Umzimba wakho uvelisa ivithamin D xa imitha yelanga ye-UV inxibelelana nolusu lwakho. Eminye imithombo efanelekileyo yevithamin iquka intlanzi, amaqanda, kunye neemveliso zobisi eziqinisiweyo. Ikwafumaneka njengezongezo zokutya.

I-Vitamin D kufuneka ihambe kwiinkqubo ezininzi emzimbeni wakho ngaphambi kokuba umzimba wakho uyisebenzise. Utshintsho lokuqala lwenzeka esibindini. Apha, umzimba wakho uguqula i-vitamin D kwikhemikhali eyaziwa ngokuba yi-25-hydroxyvitamin D, ekwabizwa ngokuba yi-calcidiol.

Uvavanyo lwe-vitamin D lwe-25-hydroxy yeyona ndlela ilungileyo yokubeka iliso kumanqanaba e-vitamin D. Ubungakanani be-25-hydroxyvitamin D egazini lakho luphawu oluhle lokuba ingakanani ivithamin D enomzimba wakho. Uvavanyo lunokuqinisekisa ukuba amanqanaba akho e-vitamin D aphezulu kakhulu okanye aphantsi kakhulu.

Uvavanyo lwaziwa ngokuba yi-25-OH ye-vitamin D yovavanyo kunye novavanyo lwe-calcidiol 25-hydroxycholecalcifoerol. Inokuba luphawu olubalulekileyo lwei-osteoporosis(ubuthathaka bamathambo) kunyeiirickets(ukungasebenzi kakuhle kwamathambo).

Ugqirha wakho unokucela uvavanyo lwe-vitamin D lwe-25-hydroxy ngezizathu ezininzi ezahlukeneyo. Inokubanceda babone ukuba ivithamin D eninzi kakhulu okanye encinci kakhulu ibangela ubuthathaka bamathambo okanye ezinye izinto ezingaqhelekanga. Isenokubeka iliso kubantu abasemngciphekweni wokuba ne-ukunqongophala kwevithamini D.

Abo basemngciphekweni omkhulu wokuba namazinga aphantsi e-vitamin D baquka:

• abantu abangafumani kakhulu ukukhanya kwelanga
• abadala abadala
• abantu abatyebe kakhulu
• iintsana ezincanciswa ibele kuphela (ubisi olungumgubo lweentsana ludla ngokuqiniswa ngevithamin D)
• abantu abaye benza utyando lwe-gastric bypass
• abantu abanesifo esichaphazela amathumbu kwaye kwenza kube nzima ukuba umzimba ukufunxa izondlo, ezifanaIsifo sikaCrohn

Ugqirha wakho usenokufuna ukuba wenze uvavanyo lwevithamin D engama-25-hydroxy ukuba sele ekufumanise ukuba unevithamin D kwaye ufuna ukubona ukuba unyango luyasebenza na.