{"id":21733,"date":"2021-04-14T10:55:22","date_gmt":"2021-04-14T08:55:22","guid":{"rendered":"https:\/\/www.mgc.es\/?p=21733"},"modified":"2021-04-14T10:56:53","modified_gmt":"2021-04-14T08:56:53","slug":"la-vitamina-d-et-pot-protegir-contra-la-covid-19","status":"publish","type":"post","link":"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/","title":{"rendered":"La vitamina D et pot protegir contra la COVID-19?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_1 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">\u00cdndex de continguts<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/#Com_afecta_el_sistema_immunitari_la_vitamina_D\" >Com afecta el sistema immunitari la vitamina D<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/#Vitamina_D_i_COVID-19\" >Vitamina D i COVID-19<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/#Factors_que_poden_causar_manca_de_vitamina_D\" >Factors que poden causar manca de vitamina D<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/#Dieta_inadequada\" >Dieta inadequada<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/#Falta_de_sol\" >Falta de sol<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/#Color_de_la_pell\" >Color de la pell<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/#El_pes\" >El pes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/#Conclusions\" >Conclusions<\/a><\/li><\/ul><\/nav><\/div>\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"573\" src=\"https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/gafas-luz-sol-880x573.jpg\" alt=\"\" class=\"wp-image-21727\" srcset=\"https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/gafas-luz-sol-880x573.jpg 880w, https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/gafas-luz-sol-440x286.jpg 440w, https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/gafas-luz-sol-768x500.jpg 768w, https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/gafas-luz-sol.jpg 1024w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/figure>\n\n\n\n<p>Sabem que la vitamina D \u00e9s essencial per a la salut dels ossos i dels m\u00fasculs, per\u00f2 tamb\u00e9 t\u00e9 un paper decisiu en el sistema immunitari. Els cient\u00edfics s&#8217;han demanat si una dosi abundant d&#8217;aquesta vitamina, tan associada al sol, pot protegir contra la COVID-19.<\/p>\n\n\n\n<p>El cas \u00e9s que s&#8217;han detectat nivells baixos de vitamina D en pacients de COVID-19 amb s\u00edmptomes greu, per\u00f2 no hi ha proves que en demostrin la causalitat; dit altrament, no es pot afirmar que l&#8217;estat de gravetat \u00e9s per manca d&#8217;aquesta vitamina. De tota manera, la ci\u00e8ncia s&#8217;interroga s&#8217;hi pot contribuir o no. Qu\u00e8 en sabem de la vitamina D i la COVID-19?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Com_afecta_el_sistema_immunitari_la_vitamina_D\"><\/span><strong>Com afecta el sistema immunitari la vitamina D<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>El sistema immunitari \u00e9s com anomenem la complexa xarxa de c\u00e8l\u00b7lules i prote\u00efnes que treballen plegades per defensar el cos contra les infeccions i les malalties. De manera molt simple direm que el conformen les respostes \u2018innates\u2019 i \u2018adaptatives\u2019, i la vitamina D actua en tots dos casos.<\/p>\n\n\n\n<p>La immunitat innata \u00e9s la primera l\u00ednia de defensa contra els microbis estranys. Actua de manera r\u00e0pida i no espec\u00edfica: t\u00e9 com a ra\u00f3 de ser frenar immediatament l&#8217;expansi\u00f3 del microbi. La immunitat adaptativa, en canvi, es construeix al llarg del temps, perqu\u00e8 el sistema immunitari recorda els microbis que ja havia eliminat; \u00e9s a dir, actua quan falla el sistema innat.<\/p>\n\n\n\n<p>La vitamina D no tan sols activa el sistema immunitari, sin\u00f3 que potencia la funci\u00f3 de les c\u00e8l\u00b7lules responsables de les respostes immunit\u00e0ries, com ara els limf\u00f2cits T i els macr\u00f2fags, que combaten la inflamaci\u00f3. Per tant, sembla que no ha de sorprendre que la manca de vitamina D s&#8217;associ\u00ef a m\u00e9s vulnerabilitat a l&#8217;hora d&#8217;agafar una infecci\u00f3 i a les malalties i als trastorns del sistema immunitari; per\u00f2 fixar-se nom\u00e9s en la vitamina D \u00e9s considerar un \u00fanic aspecte del tema.<\/p>\n\n\n\n<p>Hi ha molt factors que afecten el nivell de vitamina D a la sang. Els nivells baixos s\u00f3n habituals en persones obeses, sedent\u00e0ries, fumadors, persones que surten poc o segueixen dietes deficients\u2026 I tots aquests factors causen moltes malalties comunes. Aix\u00ed doncs, pot ser que els valors baixos de vitamina D reflecteixin un cert estil de vida.<\/p>\n\n\n\n<p>A m\u00e9s a m\u00e9s, la vitamina D \u00e9s un reactiu negatiu de fase aguda, cosa que vol dir que els nivells de vitamina disminueixen com a resposta a la inflamaci\u00f3 o la infecci\u00f3. I molta gent t\u00e9 inflamaci\u00f3 abans de desenvolupar una malaltia, la qual pot fer minvar el nivell de vitamina D; \u00e9s a dir, \u00e9s la malaltia que causaria el descens de la vitamina en comptes de ser la manca de vitamina un desencadenant de la malaltia.<\/p>\n\n\n\n<p>Aix\u00f2, per\u00f2, no minimitza gens la import\u00e0ncia de la vitamina D. Si els valors en s\u00f3n molt baixos, es pot malmetre l&#8217;estructura \u00f2ssia per manca de calci. Una altra \u00e0rea en qu\u00e8 la vitamina D t\u00e9 un paper important \u00e9s la que constitueixen les infeccions respirat\u00f2ries agudes. En una metan\u00e0lisi de 40 assaigs duts a terme a la Universitat Queen Mary, de Londres, es va trobar que els suplements de vitamina D redu\u00efen el risc de patir infeccions del tracte respiratori, i eren especialment efectius en els pacients amb defici\u00e8ncies respirat\u00f2ries greus. Malgrat tot, actualment tenim poques proves que demostrin que els suplements de vitamina D puguin prevenir o tractar la COVID-19.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"451\" src=\"https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/salmon.jpg\" alt=\"\" class=\"wp-image-21721\" srcset=\"https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/salmon.jpg 800w, https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/salmon-440x248.jpg 440w, https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/salmon-768x433.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Vitamina_D_i_COVID-19\"><\/span><strong>Vitamina D i COVID-19<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ja hem vist que hi ha diversos estudis que corroboren que els nivells baixos de vitamina D s&#8217;associen a complicacions greus de la COVID-19. Dit altrament, si tens manca de vitamina D, \u00e9s m\u00e9s probable que vagis a parar a l&#8217;hospital en cas que t&#8217;encomanis de COVID-19. Ara b\u00e9, cal insistir que aix\u00f2 no prova pas una relaci\u00f3 de causa-efecte. Ara per ara, la comunitat cient\u00edfica investiga si \u00e9s possible que sigui d&#8217;aquesta manera.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Factors_que_poden_causar_manca_de_vitamina_D\"><\/span><strong>Factors que poden causar manca de vitamina D<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Hi ha factors que influeixen en el risc de disminuci\u00f3 de la vitamina D, entre els quals trobem:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dieta_inadequada\"><\/span><strong>Dieta inadequada<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La font principal de vitamina D \u00e9s el sol, encara que si s&#8217;inclou una dosi de vitamina D a la dieta es pugui pal\u00b7liar una manca d&#8217;exposici\u00f3 solar.<\/p>\n\n\n\n<p>Recordem que els aliments m\u00e9s rics en vitamina D s\u00f3n el peix blau (sardina, arengada, salm\u00f3 i truita), els ous, la llet i els lactis i l&#8217;oli de fetge de bacall\u00e0.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Falta_de_sol\"><\/span><strong>Falta de sol<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La defici\u00e8ncia de vitamina D \u00e9s m\u00e9s usual en persones que passen poca estona a l&#8217;aire lliure, \u00e9s a dir amb menys exposici\u00f3 solar. Malauradament aqu\u00ed hi podem incloure la majoria dels malalts. Cal tenir en compte, tamb\u00e9, que a mesura que ens fem grans la pell perd la capacitat de convertir la llum en vitamina D.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Color_de_la_pell\"><\/span><strong>Color de la pell<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La melanina, el pigment natural de la pell, redueix la capacitat de la pell de convertir els raigs solars en vitamina D. Les persones de ra\u00e7a negra, asi\u00e0tica o les minories \u00e8tniques amb una altra tonalitat de pell necessiten estar-se m\u00e9s estona al sol per produir la quantitat de vitamina D que \u00e9s imprescindible.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"El_pes\"><\/span><strong>El pes<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La vitamina D \u00e9s liposoluble (\u00e9s a dir, soluble en greixos), cosa que significa que s&#8217;adhereix al greix. L&#8217;obesitat augmenta el risc de tenir manca de vitamina D, perqu\u00e8 la &#8220;segrestra&#8221; i en fa disminuir la disponibilitat.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/mascarilla.jpg\" alt=\"\" class=\"wp-image-21725\" srcset=\"https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/mascarilla.jpg 800w, https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/mascarilla-440x293.jpg 440w, https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/mascarilla-768x512.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusions\"><\/span><strong>Conclusions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tingues cura dels valors de vitamina D. L&#8217;Acad\u00e8mia Nacional de Medicina dels Estats Units (l&#8217;antic Institute of Medicine o IOM) calcula que la dosi di\u00e0ria hauria de ser 400 unitats per als adults i els infants, i la dobla fins a 800 u. di\u00e0ries per a les embarassades o les dones que alleten. Una unitat equival a 0,025 \u00b5g (micrograms), per tant, 400 u. = 10 \u00b5g.<\/p>\n\n\n\n<p>Hi ha diverses raons per vigilar el nivell de vitamina D. Hem vist que mantenir-la en els valors adequats \u00e9s bo per als ossos i els m\u00fasculs. De la mateixa manera, hem explicat que, encara que els nivells siguin adients, no pots evitar pas d&#8217;agafar la COVID-19, si acaba passant. Ara b\u00e9, el fet evident \u00e9s que si te n&#8217;encomanes i els valors de vitamina D s\u00f3n \u00f2ptims, els s\u00edmptomes de la infecci\u00f3 seran m\u00e9s lleus.<\/p>\n\n\n\n<p>No t&#8217;equivoquis, per\u00f2, pensant que no te n&#8217;encomanar\u00e0s perqu\u00e8 tens els nivells adequats de vitamina D! Aix\u00ed doncs, continua fent servir la m\u00e0scara, evita el contacte amb les persones amb qui no convius, estigues-te a casa tant com puguis i renta&#8217;t les mans a fons i sovint.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sabem que la vitamina D \u00e9s essencial per a la salut dels ossos i dels m\u00fasculs, per\u00f2 tamb\u00e9 t\u00e9 un paper decisiu en el sistema immunitari. Els cient\u00edfics s&#8217;han demanat si una dosi abundant d&#8217;aquesta vitamina, tan associada al sol, pot protegir contra la COVID-19. El cas \u00e9s que s&#8217;han detectat nivells baixos de vitamina [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":21727,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[481,531],"class_list":["post-21733","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-salut","tag-prevencio","tag-vitamines"],"featured_image_src":"https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/gafas-luz-sol.jpg","author_info":{"display_name":"Revista Inter\u00e8s Mutu","author_link":"https:\/\/www.mgc.es\/ca\/blog\/author\/interesmutu\/"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La vitamina D et pot protegir contra la COVID-19? - MGC M\u00fatua<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La vitamina D et pot protegir contra la COVID-19? - MGC M\u00fatua\" \/>\n<meta property=\"og:description\" content=\"Sabem que la vitamina D \u00e9s essencial per a la salut dels ossos i dels m\u00fasculs, per\u00f2 tamb\u00e9 t\u00e9 un paper decisiu en el sistema immunitari. Els cient\u00edfics s&#8217;han demanat si una dosi abundant d&#8217;aquesta vitamina, tan associada al sol, pot protegir contra la COVID-19. El cas \u00e9s que s&#8217;han detectat nivells baixos de vitamina [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/\" \/>\n<meta property=\"og:site_name\" content=\"MGC M\u00fatua\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/mgcmutua\" \/>\n<meta property=\"article:published_time\" content=\"2021-04-14T08:55:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-04-14T08:56:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.mgc.es\/wp-content\/uploads\/2021\/04\/gafas-luz-sol.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"976\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Revista Inter\u00e8s Mutu\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@mgcmutua\" \/>\n<meta name=\"twitter:site\" content=\"@mgcmutua\" \/>\n<meta name=\"twitter:label1\" content=\"Escrit per\" \/>\n\t<meta name=\"twitter:data1\" content=\"Revista Inter\u00e8s Mutu\" \/>\n\t<meta name=\"twitter:label2\" content=\"Temps estimat de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minuts\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"La vitamina D et pot protegir contra la COVID-19? - MGC M\u00fatua","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.mgc.es\/ca\/blog\/la-vitamina-d-et-pot-protegir-contra-la-covid-19\/","og_locale":"ca_ES","og_type":"article","og_title":"La vitamina D et pot protegir contra la COVID-19? - MGC M\u00fatua","og_description":"Sabem que la vitamina D \u00e9s essencial per a la salut dels ossos i dels m\u00fasculs, per\u00f2 tamb\u00e9 t\u00e9 un paper decisiu en el sistema immunitari. 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