Uma udinga ukuthola izithako ze-vitamin D, ungase ubone izinketho ezimbili emashalofini: D2 no-D3. Lezi yizinhlobo ezimbili ze-vitamin D. Uma ngabe ngifuna ukondla i-vitamin D, ngizoxhomeka ku-D3, kodwa kungakhathazeki ukuthi-ngemuva kwalokho, i-D2 isetshenziswe iminyaka eminingi.
I-Vitamin D isebenza njenge-hormone ukusiza umzimba wakho ukuba ubambe futhi usebenzise i- calcium futhi ulawule inani le-calcium egazini lakho.
Uma ungenayo i-vitamin D eyanele, uzothuthukisa ingozi ye-osteoporosis noma ezinye izifo ezithinta amathambo ezifana ne-osteomalacia ne-osteopenia. I-Vitamin D nayo ibalulekile ukuze kutholakale amasosha omzimba anempilo kanye nomsebenzi ojwayelekile we-nervous and muscle.
I-vitamin D encane kakhulu ye-Biochemistry
I-Cholecalciferol (okungukuthi i-D3) ifomu le-vitamin D elitholakala ezilwaneni. Uma isikhumba sakho sibonakala emisebeni ye-UVB yelanga, umzimba wakho uguqula into ebizwa ngokuthi i-7-Dehydrocholesterol ngokusebenzisa uchungechunge lwezinyathelo ze-biochemical kuya kwe-cholecalciferol. Khona-ke ngesinye isinyathelo, i-cholecalciferol iguqulwa kuba i-calcifediol, ebizwa nangokuthi i-25-hydroxyvitamin D3 futhi iyindlela ama-laboratory enza ngayo lapho udokotela wakho eyala uvivinyo lwe-vitamin D.
Okokugcina, umzimba wakho uphendukela ku-calcifediol kwifomu esebenzayo ka vithamini D (lowo owenza umsebenzi) obizwa nge-calcitriol.
Izitshalo zihamba ngendlela efanayo, kodwa esikhundleni se-cholecalciferol, izitshalo zine-ergocalciferol (D2).
I-cholecalciferol ne-ergocalciferol ziyizici ezifanayo kakhulu futhi ngasekupheleni kwawo-1920, kwafunyanwa ukuthi i-ergocalciferol yayiwusizo ekuphatheni izingane ezincane. Sekuyiminyaka eminyaka, i-ergocalciferol yamukelwe njengendlela eyengeziwe yokufaka vithamini D.
Ngomnyaka we-1980 no-90s, ososayensi baphakamisa ukuthi ifomu lesilwane, i-D3, laliwusizo kakhulu ekukhuliseni izinga lama-vitamin D3 (25-hydroxyvitamin D3).
Kusukela ngaleso sikhathi ezinye izifundo ezimbili azitholanga umehluko phakathi kwamafomu amabili kanti okwesithathu ukuthola ukunyuka okusheshayo okunamandla nge-D3 supplements, kodwa abacwaningi babengacacile uma kwenza umehluko omkhulu ngokwelapha.
Kungani lezi zifundo zinemiphumela ehlukene kangaka? Izinto eziningi zingathinta izifundo zocwaningo zalolu hlobo. Ucwaningo olulodwa lwenziwe ehlobo ukuze ukushiswa kwelanga kungahle kube khona ukuphazamisa imiphumela. Futhi mhlawumbe ukudla nokusetshenziswa kwezithako zokudla kungashintsha izinto. Futhi ubani oyisiqephu esihle kunazo zonke abantu abazozifunda? Iziguli ezine-osteoporosis? Isifo sezinso? Abantu abanempilo, ngubani ongase abe u-vitamin D kancane? Abantu abadala? Abantu abasha? Amadoda? Abesifazane? Ukucwaninga kungaba nzima ngoba okutholakele iqembu elilodwa labantu lifana nelinye.
Ngiyaqiniseka ukuthi ucwaningo oluningi luzokwenziwa umahluko phakathi kuka-D2 no-D3. Kodwa okwamanje, uma ukhathazekile ngamazinga akho e- vitamin D , into engcono kakhulu ongayenza ukuya kumhlinzeki wokunakekelwa kwezempilo ukuze amazinga akho e-vitamin D ahlolwe. Uma bephansi, ungathatha noma yikuphi uhlobo lwevithamini D nangemva kwamasonto ambalwa, uphinde uhlole igazi lakho ukuze ubone ukuthi izithako ziyasebenza yini.
Hlala ulandela izikhombisi-ndlela zelebula ngokuthatha izithako ze-vitamin D ngaphandle uma umhlinzeki wakho wezempilo ekhuluma nawe ngokuhlukile.
Imithombo:
Armas LA, Hollis BW, Heaney RP. "I-Vitamin D2 ayiphumeli kangcono kune-vitamin D3 kubantu." J Clin Endocrinol Metab. 2004 Nov; 89 (11): 5387-91.
Glendenning P, Chew GT, Seymour HM, Gillett MJ, Goldswain PR, Inderjeeth CA, Vasikaran SD, Taranto M, Musk AA, Fraser WD. "Ama-Serum ama-25-hydroxyvitamin D amazinga ku-vitamin D-awanele iziguli eziqhekekile ze-hip ngemuva kokuxhaswa nge-ergocalciferol ne-cholecalciferol." I-Bone. 2009 Nov; 45 (5): 870-5.
Holick MF, Biancuzzo RM, Chen TC, Klein EK, Young A, Bibuld D, Reitz R, Salameh W, Ameri A, Tannenbaum AD. "I-Vitamin D2 iyasebenza njengoba i-vitamin D3 ekulondolozeni izingxube ze-25-hydroxyvitamin D." J Clin Endocrinol Metab. 2008 Mar; 93 (3): 677-81.
I-NIH Ihhovisi Lokudla Kwezondlo. "Iphepha Lokudla Lokudla Ngezidakamizwa: I-Vitamin D."