{"id":16535,"date":"2021-04-01T00:00:00","date_gmt":"2021-03-31T22:00:00","guid":{"rendered":"https:\/\/www.ecoceutics.com\/polifenols-te-verd\/"},"modified":"2023-04-13T14:07:23","modified_gmt":"2023-04-13T12:07:23","slug":"polifenols-te-verd","status":"publish","type":"post","link":"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/polifenols-te-verd\/","title":{"rendered":"Els polifenols del te verd"},"content":{"rendered":"<p>Els polifenols del te verd tenen fama de ser excel\u00b7lents antioxidants. Per\u00f2 qu\u00e8 \u00e9s exactament un polifenol? Per qu\u00e8 s\u00f3n antioxidants? Quina utilitat tenen per a nosaltres i com es prenen? T\u2019expliquem qu\u00e8 \u00e9s el te verd i la import\u00e0ncia&nbsp;dels&nbsp;seus polifenols per a la salut en aquest article.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Contenido de la p\u00e1gina<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #333333;color:#333333\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #333333;color:#333333\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<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.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/polifenols-te-verd\/#que-es-el-te-verd\" >Qu\u00e8 \u00e9s el te verd?<\/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.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/polifenols-te-verd\/#que-son-els-polifenols\" >Qu\u00e8 s\u00f3n els polifenols?<\/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.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/polifenols-te-verd\/#per-que-els-polifenols-son-antioxidants\" >Per qu\u00e8 els polifenols s\u00f3n antioxidants?<\/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.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/polifenols-te-verd\/#quines-propietats-tenen-els-polifenols-del-te-verd\" >Quines propietats tenen els polifenols del te verd?<\/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.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/polifenols-te-verd\/#quant-te-verd-podem-prendre\" >Quant&nbsp;te verd podem prendre?<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"que-es-el-te-verd\"><\/span>Qu\u00e8 \u00e9s el te verd?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Les fulles de la planta&nbsp;Camellia&nbsp;sinensis&nbsp;s\u00f3c molt vers\u00e0tils. Quan es deixen fermentar originen el te negre, una de les plantes m\u00e9s consumides en infusi\u00f3 a tot el m\u00f3n. Durant la fermentaci\u00f3 les fulles s\u00f3n sotmeses a un ambient controlat que estimula l\u2019actuaci\u00f3 d\u2019uns enzims anomenats&nbsp;polifenol oxidases; aquests enzims generen canvis en els polifenols naturalment presents en el te, alterant el sabor, olor i color del te i de les seves infusions. Per\u00f2 si aquestes fulles es tracten per a impedir que el&nbsp;polifenol oxidases&nbsp;actu\u00efn s\u2019obt\u00e9 una droga vegetal que d\u00f3na una infusi\u00f3 de color verd i marcat sabor amarg: hem obtingut te verd.<\/p>\n<p>Existeixen diferents varietats de te verd segons la zona de cultiu i el processament de la fulla. El&nbsp;matcha&nbsp;s\u2019ha posat molt de moda, per\u00f2 si vols provar un te verd de sabor diferent dels altres, et convidem a provar el nostre&nbsp;Ecovital&nbsp;Herbetes\u00ae Te verd&nbsp;Chun&nbsp;Mee. La varietat&nbsp;Chun&nbsp;Mee&nbsp;\u00e9s un te m\u00e9s \u00e0cid, menys dol\u00e7, i d\u2019aroma m\u00e9s intens que altres varietats de te verd.<\/p>\n<p>En qualsevol cas, la Farmacopea Europea estableix que el te verd ha de contenir un m\u00ednim de 1.5% de cafe\u00efna i 8% de catequines (un tipus de polifenol). Cafe\u00efna? No es diu te\u00efna en el te? S\u00ed, \u00e9s cafe\u00efna; la mol\u00e8cula \u00e9s la mateixa que la del caf\u00e8, per\u00f2 com est\u00e0 combinada amb els tanins propis de les fulles de te, es va batejar aquest complex com \u00abte\u00efna\u00bb. El te verd tamb\u00e9 \u00e9s ric en minerals, per\u00f2 aquests no tenen un m\u00ednim establert.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"que-son-els-polifenols\"><\/span>Qu\u00e8 s\u00f3n els polifenols?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Els polifenols s\u00f3n mol\u00e8cules org\u00e0niques complexes sintetitzades per les plantes a partir de mol\u00e8cules m\u00e9s senzilles. Es caracteritzen per presentar m\u00e9s d\u2019un grup fenol en la seva estructura, d\u2019aqu\u00ed el nom (poli= grec per a molts). Sense entrar en els detalls bioqu\u00edmics complexos, diguem que les plantes poden partir de mol\u00e8cules de pocs \u00e0toms (tres i quatre carbonis, un o dos ox\u00edgens) que, reacci\u00f3 rere reacci\u00f3, van generant mol\u00e8cules grans (arribant fins a m\u00e9s de 60 carbonis). Hi ha una gran quantitat de polifenols en la naturalesa, perqu\u00e8 \u00e9s un grup molt gran que inclou mol\u00e8cules com ara:<\/p>\n<ul>\n<li>Tanins (donen sabor als vins).<\/li>\n<li>Proantocianidines&nbsp;(com les del nabiu vermell, \u00fatils en infeccions urin\u00e0ries)<\/li>\n<li>Isoflavones&nbsp;(les de la soia s\u2019utilitzen per a alleujar els s\u00edmptomes de la menopausa)<\/li>\n<li>Les catequines del te verd.<\/li>\n<li>Flavonoides com els que donen color a la pela de la taronja i la llimona.<\/li>\n<\/ul>\n<p>Alguns s\u00f3n indispensables per a les funcions fisiol\u00f2giques vegetals. Uns altres participen en funcions de defensa davant situacions d\u2019estr\u00e8s i est\u00edmuls diversos. Cadascun participa en certes reaccions, per\u00f2 per norma general s\u00f3n excel\u00b7lents antioxidants.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"per-que-els-polifenols-son-antioxidants\"><\/span>Per qu\u00e8 els polifenols s\u00f3n antioxidants?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Per a respondre aquesta pregunta hem de saber qu\u00e8 \u00e9s l\u2019oxidaci\u00f3 que volem evitar. Diverses reaccions qu\u00edmiques que es donen en el nostre organisme pel nostre propi metabolisme o despr\u00e9s de l\u2019exposici\u00f3 a certs factors (llum solar, fum de tabac, certes toxines) generen radicals lliures, \u00e9s a dir, mol\u00e8cules amb un electr\u00f3 en una situaci\u00f3 tan inestable que necessiten reaccionar amb una altra mol\u00e8cula per a estabilitzar-se. Aquesta segona mol\u00e8cula canvia la seva estructura (s\u2019oxida) i perd les seves propietats originals en aquesta reacci\u00f3. Quan aix\u00f2 passa sistem\u00e0ticament al llarg dels anys en mol\u00e8cules importants per a nosaltres (ADN, prote\u00efnes de la pell, membranes cel\u00b7lulars, etc.) comencen els problemes com el c\u00e0ncer, l\u2019envelliment, i altres varis. Ara b\u00e9, els polifenols s\u00f3n mol\u00e8cules grans que tenen carbonis i ox\u00edgens ordenats de tal manera que poden reaccionar molt f\u00e0cilment amb els radicals lliures, estabilitzant-los i protegint altres mol\u00e8cules de l\u2019oxidaci\u00f3.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"quines-propietats-tenen-els-polifenols-del-te-verd\"><\/span>Quines propietats tenen els polifenols del te verd?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Els polifenols del te verd s\u00f3n molts: tanins, catequines, tioflavines, flavonoides i antocianidines, per\u00f2 les estrelles s\u00f3n les catequines. Les catequines tenen diverses propietats d\u2019inter\u00e8s per a nosaltres:<\/p>\n<ul>\n<li>L\u2019acci\u00f3 conjunta de la cafe\u00efna i les catequines prolonguen la vida de la noradrenalina, una subst\u00e0ncia imprescindible perqu\u00e8 es cremi el greix en els adip\u00f2cits; d\u2019aqu\u00ed que el te verd tingui un cert efecte termog\u00e8nic que s\u2019aprofita en dietes d\u2019aprimament.<\/li>\n<li>Diferents catequines i extractes de te verd s\u2019han assajat en una varietat de models animals i in vitro, en c\u00e8l\u00b7lules tumorals i l\u00ednies cel\u00b7lulars establertes, controlant processos d\u2019import\u00e0ncia en el desenvolupament de tumors (van inhibir proliferaci\u00f3 cel\u00b7lular i van facilitar la mort cel\u00b7lular).<\/li>\n<li>Algunes catequines han demostrat activitat antibacteriana in vitro.<\/li>\n<li>Les malalties neurodegeneratives podrien beneficiar-se de l\u2019activitat antioxidant de les catequines, d\u2019acord amb alguns petits estudis.<\/li>\n<\/ul>\n<p>El consum de te verd estaria relacionat amb la prevenci\u00f3 de c\u00e0ncers com el de pulm\u00f3, c\u00f2lon, es\u00f2fag, intest\u00ed, rony\u00f3, p\u00e0ncrees o mama. Estudis en animals suggereixen que el te verd baixa la tensi\u00f3, protegint contra problemes cardiovasculars. Fins i tot existeix un medicament basat en els polifenols del te verd, el&nbsp;Veregen\u00ae: cont\u00e9 un 10% d\u2019extracte de te verd i s\u2019utilitza per a tractar berrugues genitals externes i perianals. Es desconeix el mecanisme exacte, per\u00f2 sembla que les&nbsp;sinecatequines&nbsp;del te verd eviten la proliferaci\u00f3 de queratin\u00f2cits (c\u00e8l\u00b7lules de pell) gr\u00e0cies al seu efecte antioxidant.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"quant-te-verd-podem-prendre\"><\/span>Quant&nbsp;te verd podem prendre?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Si desitges beneficiar-te de les propietats del te verd&nbsp;pots&nbsp;gaudir-lo a discreci\u00f3, per\u00f2 compte amb la cafe\u00efna: depenent la concentraci\u00f3 de la cafe\u00efna del te, fins a 5 tasses al llarg d\u2019un dia (puntualment, no al llarg de setmanes) es considera una dosi di\u00e0ria adequada per a no passar de 300 mg de cafe\u00efna diaris.<\/p>\n<ul>\n<li>Si vols aprofitar-te de la cafe\u00efna, fes una infusi\u00f3 durant un temps curtet, perqu\u00e8 la cafe\u00efna surt amb facilitat de la planta.<\/li>\n<li>Si vols els antioxidants deixa la planta en contacte amb l\u2019aigua una estona m\u00e9s, perqu\u00e8 els antioxidants demoren una mica m\u00e9s a sortir.<\/li>\n<\/ul>\n<p>Sobretot, no exageris; no fa falta que els teus dos litres d\u2019aigua diaris siguin de te verd. Existeixen casos reportats d\u2019hepatitis associada al consum excessiu de te verd. Tamb\u00e9 hi ha reportats problemes d\u2019interaccions amb diversos medicaments, aix\u00ed que recorda: natural no significa innocu, i si tens algun dubte, el teu farmac\u00e8utic podr\u00e0 ajudar-te a triar la millor manera de consumir te verd per a tu.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Els polifenols del te verd tenen fama de ser excel\u00b7lents antioxidants. Per\u00f2 qu\u00e8 \u00e9s exactament un polifenol? Per qu\u00e8 s\u00f3n antioxidants? Quina utilitat tenen per a nosaltres i com es prenen? T\u2019expliquem qu\u00e8 \u00e9s el te verd i la import\u00e0ncia&nbsp;dels&nbsp;seus polifenols per a la salut en aquest article. Qu\u00e8 \u00e9s el te verd? Les fulles [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":17998,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"_mbp_gutenberg_autopost":false,"footnotes":""},"categories":[4,59],"tags":[],"class_list":["post-16535","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-respostes-de-salut","category-vitamines"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>El poder antioxidant dels polifenols del te verd<\/title>\n<meta name=\"description\" content=\"Els polifenols del te verd tenen fama de ser excel\u00b7lents antioxidants. Per\u00f2, qu\u00e8 \u00e9s exactament un polifenol? 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