I-Vitamin D iwumndeni wezakhi zomzimba ezinokufana kwesakhiwo samakhemikhali. Amavithamini D2 kanye no-D3 atholakala ekudleni. Zombili izinhlobo zisiza ukuhlangabezana nezidingo ze-vitamin D. Kukhona umehluko obalulekile phakathi kwabo. “Umehluko phakathi kwe-vitamin D2 ne-D3 ngani?"
Umehluko phakathi kwe-vitamin D2 ne-D3
Ucwaningo lubonisa ukuthi i-vitamin D2 ayisebenzi kahle ekukhuphuleni amazinga egazi kune-vitamin D3.
Ivithamini Dinamafomu amabili amakhulu:
- I-Vitamin D2 (ergocalciferol)
- I-Vitamin D3 (cholecalciferol)
Umehluko phakathi kwe-vitamin D2 ne-D3 imi kanje;
Uvithamini D3 uvela ezilwaneni kanti uvithamini D2 uvela ezitshalweni.
Izinhlobo ezimbili zikavithamini D ziyahlukahluka ngemithombo yokudla. I-Vitamin D3 itholakala kuphela ekudleni okuvela ezilwaneni, kuyilapho i-vitamin D2 itholakala kakhulu emithonjeni yezitshalo kanye nokudla okuqinile.
Imithombo ye-vitamin D3 ihlanganisa;
- Izinhlanzi ezinamafutha kanye namafutha ezinhlanzi
- Isibindi
- Isikhuphasha seqanda
- ibhotela
- Izithasiselo zokudla okunempilo
Imithombo kavithamini D2 imi kanje;
- Amakhowe (akhule ekukhanyeni kwe-UV)
- Ukudla okuqinisiwe
- Izithasiselo zokudla okunempilo
Ngenxa yokuthi i-vitamin D2 ishibhile ukuyikhiqiza, leli yilona fomu elivame kakhulu elitholakala ekudleni okuqinisiwe.
I-Vitamin D3 yakheka esikhumbeni
Isikhumba sethu sikhiqiza uvithamini D3 lapho sichayeka elangeni. Ikakhulukazi, imisebe ye-ultraviolet B (UVB) evela elangeni idala ukwakheka kukavithamini D7 kunhlanganisela engu-3-dehydrocholesterol esikhumbeni.
Inqubo efanayo yenzeka ezitshalweni nesikhunta, lapho ukukhanya kwe-UVB kubangela ukwakheka kwe-vitamin D2 evela ku-ergosterol, isakhi esitholakala emafutheni ezitshalo.
Uma uchitha isikhathi ungaphandle masonto onke, ngaphandle kokuvikela ilanga, ungakhiqiza wonke uvithamini D oyidingayo.
Kodwa qaphela ngokuchitha isikhathi esiningi elangeni ngaphandle kokuvikela ilanga. Lokhu kubaluleke kakhulu kulabo abanesikhumba esikhanyayo. Ukushiswa yilanga kuyisici esibalulekile esiyingozi kumdlavuza wesikhumba.
Ngokungafani ne-vitamin D ethathwe nezithako zokudla okunomsoco, ngeke ube ne-overdose nge-vitamin D3 ekhiqizwa esikhumbeni. Ngoba uma umzimba usuvele unokwanele, isikhumba sikhiqiza kancane.
I-Vitamin D3 iyasebenza kakhulu
Amavithamini D2 kanye ne-D3 awafani uma kuziwa ekukhuliseni amazinga kavithamini D. Zombili zimuncwa ngokuphumelelayo egazini. Kodwa-ke, isibindi siwashintsha ngendlela ehlukile.
Isibindi sigaya i-vitamin D2 ku-25-hydroxyvitamin D2 kanye ne-vitamin D3 kuya ku-25-hydroxyvitamin D3. Lezi zinhlanganisela ezimbili zaziwa ngokuhlanganyela njenge-calcifediol.
I-Calcifediol iwuhlobo oluyinhloko olujikelezayo lukavithamini D, futhi amazinga egazi abonisa izitolo zomzimba zalezi zakhi.
I-Vitamin D2 ikhiqiza i-calcifediol encane kunenani elilinganayo likavithamini D3. Ucwaningo oluningi lubonisa ukuthi i-vitamin D3 iphumelela kakhulu kune-vitamin D2 ekukhuphuleni amazinga egazi e-calcifediol.
Uma uthatha isithasiselo se-vitamin D, ungathatha i-vitamin D3.
Ososayensi bazwakalise ukukhathazeka ngokuthi izithasiselo zikavithamini D2 zingase zibe zekhwalithi ephansi kunezithako ze-D3.
Eqinisweni, ucwaningo lubonisa ukuthi uvithamini D2 uzwela kakhulu ekushintshashintsheni komswakama kanye nezinga lokushisa. Yingakho izithasiselo ze-vitamin D2 zinamathuba amaningi okuwohloka ngokuhamba kwesikhathi.
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