Isiqinisekiso sempilo ibhalansi yamavithamini emzimbeni, futhi namhlanje sizokhuluma ngezinto ezithakazelisayo kakhulu kubo. I-Vitamin B12 noma i-cyanocobalamin yinto encibilikayo yamanzi equkethe i-molecule ye-cobalt. Watholwa yakamuva eqenjini lamavithamini B. Ukungabi khona kwevithamini B12 kuholela emiphumeleni enzima kakhulu, okuzoxoxwa ngezansi.
Indima yeB12 emzimbeni
I-Cyanocobalamin ibandakanyeka emaprotheni umzimba, okufaka isandla ekwakhekeni kwama-amino acids, futhi idlala indima ebalulekile ekusebenzeni kwe-hematopoiesis - yingakho ukungabi nalutho lwe-vitamin B12, i-anemia ihlotshaniswa.
Ngaphandle kwe-cyanocobalamin, ukuhlanganiswa kwezinhlobo eziningi ze-enzyme akuphelele, ngaphezu kwalokho, i-vitamin ine-antisclerotic effect, ngakho isetshenziselwa ukwelashwa kwe- atherosclerosis .
Izizathu zokuntuleka kwe-vitamin B12
Ukuntuleka kwe-cyanocobalamin kuhlotshaniswa nezimbangela ezingavamile (ukungabi nokudla okuqukethe i-B12) nokungapheli (ukungabi nalokhu okubizwa ngokuthi ngaphakathi kwangaphakathi kukaKastla, obhekene nokufaniswa kwevithamini).
Esikhathini sokuqala, izimpawu zokuntuleka kwevithamini B12 zibonakala ngenxa yokudliwa kokudla inyama, inhlanzi, ushizi, amaqanda nemikhiqizo yobisi. Ngoba izilonda zelulekwa ukuba ziqaphe ngokucophelela izinga le-cyanocobalamin futhi zigcwalise isitoko sayo ngosizo lwevithamini eziyinkimbinkimbi.
Esikhathini sesibili, izimpawu zokuntuleka kwe-vitamin B12 zihlobene nokuhlaselwa kwe-mucosa yesisu, ifa, i-helminthic invasions, i-gastritis, isifo sofuba esiswini, isifo somdlavuza wesisu.
Ukuntuleka kwe-cyanocobalamin kubonakala kanjani?
I-Vitamin B12 yenza ngokubambisana ne-B9 (folic acid), futhi ngokuntuleka kwayo, kukhona:
- ukwephulwa kwe-hematopoiesis kanye nokwakhiwa kwamaseli abomvu abomvu ngokukhethekile, okuvezwe ukuhlaziywa kwegazi;
- I-anemia ngemuva kokuncipha kwenani lamaseli abomvu egazi;
- ukunqotshwa kwesimiso sezinzwa, ukukhubazeka, ukungenwa kwezandla, iminwe;
- i-syndrome engapheliyo;
- ukuphazamiseka kokulala, ukucindezeleka, ukucasula.
Ngaphezu kwalokho, ukuntuleka kwe-vitamin B12 kungabonisa izimpawu ezinjengokusikhipha isisu, ukulahlekelwa ukudla, i-atony emathunjini, izilonda ngolimi, ukuvimbela ukukhiqizwa kwe-hydrochloric acid ngesisu (isi-achillia).
Imithombo B12
Ukuziqhenya kwe-cyanocobalamin kungukungabi khona kwayo ngokuphelele emikhiqizweni yesitshalo, ngakho-ke ukuphelelwa yisiqu kuphela kungenziwa inshuwalense ngezimpawu zokuntuleka kwevithamini B12
- isibindi nezinso zezilwane;
- i-octopus, i-herring, i-mackerel;
- yenkomo, iwundlu;
- izinhlobo zama-cheese izinhlobo ze-cheddar ne-gouda;
- amaqanda inkukhu (isikhuphakazi);
- ubisi, ukhilimu omuncu we-yoghurt.
Umkhuba wansuku zonke we-B12 kumuntu omdala: 2.6-4 μg. Futhi, i-vithamini isakhiwe emathunjini amakhulu omuntu, kepha lapho ayitholakali.