Vitamini D ndi mchere wofunikira kwambiri womwe umayendetsa ntchito zingapo zamagetsi. Vitamini D imapangidwa m'magawo akuluakulu a khungu pogwiritsa ntchito mphamvu ya dzuwa. Chifukwa thupi limatha kupanga vitamini D, silimatengedwa ngati "chofunikira" chamoyo, ngakhale kuti vitamini D yofunika kwambiri ndi thupi la munthu imabwera kuchokera ku zakudya.
Vitamini D, yogwiritsira ntchito hormone ya parathyroid, ndiyo makamaka yomwe imayambitsa kuthetsa kuchuluka kwa calcium ndi phosphorous m'magazi. Vitamini D imalimbikitsanso kupanga mapangidwe a mafupa ndipo amadziwika kuti ayambitse kupanga maselo m'thupi.
Kafukufuku wochulukirapo akuonetsa kuti vitamini D ingathandizenso kutsata ndondomeko ya magazi ndi thanzi labwino . Mwachitsanzo, zimadziwika kuti matenda a kuthamanga kwa magazi amawonjezeka m'nyengo yozizira komanso m'malo ena omwe amachokera ku equator. Zonsezi ndizomwe kuchepa kwa dzuwa kumachepetsanso kuchepa kwa vitamini D.
Kodi Vitamini D Ingapewe Kuthamanga Kwambiri kwa Magazi?
Mwinamwake - umboni sali womveka bwino. Ngakhale kuti ntchito ya vitamini D mu kupsyinjika kwa magazi ndi kudwala kwa mtima ndiyo yokhudza kufufuzidwa kwakukulu kuyambira pakati pa zaka za m'ma 1980, zotsatira za kafukufuku ndi zovuta kutanthauzira.
Ngakhale zimadziwika kuti mitsempha yonse ndi mtima zili ndi mavitamini ambiri a receptors - zomwe zimatanthawuza kuti vitamini D ikugwira ntchito poyendetsa nkhaniyi - kuwonetsa zomwe awa amalandirawa akhala ovuta. Kafukufuku wokhudzana ndi vitamini D nthawi zina amaoneka ngati akutsutsana, ndipo nthawi zina amapereka deta yomwe silingathe kumasuliridwa molondola.
Kafukufuku wina anapeza kuti kupereka vitamini D kwa akuluakulu omwe ali ndi mphamvu yapamwamba ya magazi kunachititsa kuti systolic magazi ndi kuthamanga kwa magazi kuchepe. Phunziro lomweli linapezanso kuti kupereka mavitamini D ndi calcium pamodzi kunachepetsanso kuchepa kwakukulu kwa systolic ndi diastolic . Deta imeneyi imasonyeza kuti vitamini D ndi calcium zimagwirira ntchito pothandizira kuchepetsa kupanikizika kwa magazi komanso kuti kashiamu yamtunduwu imapangitsa kuti magazi azichepetsa mphamvu ya vitamini D. Komatu chidwi kwambiri pamene ophunzirawo anafufuzidwa mosamala, kuti izi zokha zinkagwira ntchito mwa anthu omwe anali ndi ma kashiamu okwera kwambiri kuyamba. Anthu omwe anali ndi ma calcium otsika pachiyambi, ngakhale vitamini D kapena vitamini D komanso calcium zinkathandiza kwambiri kuchepetsa kuthamanga kwa magazi.
Zofukufukuzi zinapangitsanso kusokonezeka kwambiri ndi phunziro lina lomwe linkawoneka kuti likusonyeza kuti calcium yapamwamba imagwirizanitsidwa ndi chiopsezo chokhala ndi mavuto a mtima, kuphatikizapo kuthamanga kwa magazi. Kafukufukuyu anafufuza gulu la odwala moyenera ndipo anapeza kuti ma calcium, ma shuga , ndi mafuta a kolesterolo onse ankaoneka kuti akukwera pamodzi.
Izi zikutanthauza kuti anthu omwe ali ndi cholesterol (high cholesterol) chofunika kwambiri - amawoneka kuti ali ndi kashiamu yapamwamba. Phunziro lomwelo linasonyezanso kugwirizana pakati pa calcium ndi kuthamanga kwa magazi. Pamene ma calcium anakula, kuthamanga kwa magazi kunkawonjezeka.
Kuganizira za maphunziro awiriwa pamodzi ndi chitsanzo chabwino cha chifukwa chake chithunzi cha vitamini D sichiri chodziwikiratu. Ngati ma calcium apamwamba ali ndi kuthamanga kwa magazi , ndiye bwanji kupatsa anthu omwe ali ndi kuthamanga kwa magazi, komanso mochuluka, calcium (kuphatikizapo vitamini D) imayambitsa kupsyinjika kwa magazi?
Posachedwapa, ofufuza akhala akugwirizanitsa pamodzi mayankho ena ku mafunso osokoneza bongo.
Deta yooneka ngati yotsutsana yomwe imapezeka m'mabuku ambiri a vitamini D ikhoza kukhala chifukwa cha ntchito yokhudzana ndi impso. Kafukufuku wina wofunikira anasonyeza kuti zochita za vitamini D zikuwoneka kuti zikusintha chifukwa cha ntchito ya impso komanso ntchito ya renin-angiotensin . Popeza anthu omwe ali ndi kuthamanga kwa magazi angapangitse kusintha kwa impso, ndipo nthawi zambiri amakhala ndi machitidwe osokoneza bongo-angiotensin, kafukufuku wakale sangakhale wosatsutsika konse.
Ngakhale n'zoonekeratu kuti vitamini D imakhala ndi mbali yothetsera kuthamanga kwa magazi, ndipo anthu omwe ali ndi mavitamini D ochepa amakhala ndi vuto lalikulu la mtima, chikhalidwe chenicheni cha maubwenzi ovutawo chiyenera kugwiritsidwa ntchito chisanachitike chithunzichi malizitsani.
Kodi Ndiyenera Kutenga Mavitamini A Ovomerezeka?
Ayi. Palibe umboni wotsimikizira kuti m'kamwa mwa vitamini D supplementation mumapereka chitetezo chilichonse choletsa kuthamanga kwa magazi kapena matenda a mtima. Umboni womwe ukupitirira pano ukusonyeza kuti zakudya za vitamini D zodyera ndizokwanira kupeŵa mikhalidwe ya "vitamini" yomwe yakhala ikugwirizanitsa ndi matenda. Kwa anthu okalamba, akuluakulu odwala, chakudya chopatsa thanzi chingapereke vitamini D. okwanira Anthu omwe ali ndi vuto la vitamini D loyenera kutero angafunike kupatsirana pakamwa, koma izi siziri chifukwa cha mtima.
Mavitamini D opatsirana tsiku ndi tsiku ndi awa:
- Wachinyamata kuposa 50: 5 micrograms / 200IU
- Zaka 50-70: 10 micrograms / 400IU
- Zaka zoposa 70 Zakale: 15 micrograms / 600IU
Kodi Zakudya Zabwino Zotani za Vitamini D?
Vitamini D imapezeka mu zakudya zambiri, ndipo zakudya zambiri zomwe zimagulidwa "zimapindula" ndi vitamini D. Mkaka, ufa, ndi ufa wophika ndizo zonse zomwe zili ndi vitamini D. "Zina mwazochokera ku vitamini D ndizo:
- Salimoni 4oz: 400IU
- Mkaka 1cup: 50-75IU
- Tuna 3oz: 200IU
- Mazira: 20IU aliyense
- Bowa 3oz (chikho chimodzi): 2700IU (organic, UV treated)
Zakudya izi zonse ndi gawo la chakudya chamagulu, chabwino.
Zotsatira
Lind, L, Wengle, B, Wide, L, et al. Kuchepetsa Kupanikizika kwa Magazi Pakati pa Kuchiza Kwanthaŵi yaitali Ndi Vitamini D yogwira ntchito (Alphacalcidol) Zimadalira pa Plasma Renin Ntchito ndi Calcium. Phunziro Loyendetsedwa Bwino Pachiwiri. Am J Hypertens 1989; 2:20.
Pfeifer, M, Begerow, B, Minne, HW, et al. Zotsatira za Vitamin D 3 Yakale ndi Calcium Supplementation pa Mliri wa Magazi ndi Nthenda za Hormone za Parathyroid mu Akazi Okalamba. J Clin Endocrinol Metab 2001; 86: 1633.
Thomas J. Wang, ndi al. Vitamini D Kufooka ndi Kuopsa kwa Matenda a Mtima. Kuzungulira Circulation Jan 2008; onetsani: 10.1161 / CIRCULATIONAHA.107.706127