{"id":80672,"date":"2023-08-11T08:30:34","date_gmt":"2023-08-11T06:30:34","guid":{"rendered":"https:\/\/www.bioecoactual.com\/?p=80672"},"modified":"2025-06-12T17:44:27","modified_gmt":"2025-06-12T15:44:27","slug":"dieta-i-fotoproteccio","status":"publish","type":"post","link":"https:\/\/www.bioecoactual.com\/ca\/2023\/08\/11\/dieta-i-fotoproteccio\/","title":{"rendered":"Dieta i fotoprotecci\u00f3"},"content":{"rendered":"<p>Tots sabem que l\u2019exposici\u00f3 excessiva al Sol pot desencadenar problemes a la pell a curt i llarg termini i associem la fotoprotecci\u00f3 a l\u2019\u00fas de productes t\u00f2pics que sens dubte s\u00f3n de gran utilitat. Per\u00f2, qu\u00e8 pot fer la dieta per ajudar-nos en aix\u00f2?<br \/>\n<!--more--><\/p>\n<figure id=\"attachment_80664\" aria-describedby=\"caption-attachment-80664\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-80664 size-full\" src=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2023\/08\/Dieta-y-fotoproteccion-1.jpg\" alt=\"Dieta i fotoprotecci\u00f3\" width=\"1000\" height=\"667\" srcset=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2023\/08\/Dieta-y-fotoproteccion-1.jpg 1000w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2023\/08\/Dieta-y-fotoproteccion-1-768x512.jpg 768w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2023\/08\/Dieta-y-fotoproteccion-1-696x464.jpg 696w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2023\/08\/Dieta-y-fotoproteccion-1-630x420.jpg 630w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption id=\"caption-attachment-80664\" class=\"wp-caption-text\">123rf Limited\u00a9undrey. La s\u00edndria \u00e9s rica en licop\u00e8, poder\u00f3s antioxidant<\/figcaption><\/figure>\n<h2>Qu\u00e8 \u00e9s la fotoprotecci\u00f3?<\/h2>\n<p>La <strong>fotoprotecci\u00f3<\/strong> l\u2019entenem normalment com el fet de crear una barrera entre la nostra pell i els raigs del Sol. Les radiacions ultraviolades (UV) poden ser perjudicials, tant a curt termini produint cremades, com a llarg termini augmentant el risc de c\u00e0ncer de pell i d\u2019envelliment prematur. Ens podem protegir externament amb barreres f\u00edsiques com una samarreta, un barret, un mocador, un para-sol, etc., o tamb\u00e9 amb diferents productes t\u00f2pics que, per diferents mecanismes, creen una barrera protectora. Aquestes eines de fotoprotecci\u00f3 ex\u00f2gena fan possible augmentar el temps que podem estar exposats al Sol sense fer malb\u00e9 la pell. No obstant aix\u00f2, si excedim aquest temps el que passa \u00e9s que la nostra pell es fa malb\u00e9 per un proc\u00e9s conegut com a estr\u00e8s oxidatiu. Literalment ens cremem i ens oxidem. Aquesta oxidaci\u00f3 a la pell \u00e9s un dany del teixit molt important i genera una resposta inflamat\u00f2ria i per aix\u00f2 es produeix envermelliment i dolor a la zona.<\/p>\n<p>I aquest \u00e9s el punt de partida en qu\u00e8 fa uns 30 anys molts estudis van comen\u00e7ar a indagar sobre <strong>el paper de la nutrici\u00f3 en la fotoprotecci\u00f3<\/strong>. Si els raigs solars produeixen oxidaci\u00f3 a la nostra pell, pot tenir algun benefici una dieta que inclogui nutrients antioxidants? Hi ha certs micronutrients i altres subst\u00e0ncies que s\u00f3n efica\u00e7os protegint-nos mitjan\u00e7ant la reducci\u00f3 de mol\u00e8cules oxidants que es produeixen a la pell i tamb\u00e9 modulant la inflamaci\u00f3. Els micronutrients presents a la dieta, com <strong>el betacarot\u00e8, la vitamina E i C i subst\u00e0ncies antioxidants com els polifenols, el licop\u00e8 o la lute\u00efna<\/strong>, contribueixen a la defensa antioxidant i a la fotoprotecci\u00f3 end\u00f2gena. El mecanisme d\u2019acci\u00f3 no \u00e9s de barrera sin\u00f3 d\u2019augment de la capacitat de la pell de contrarestar l\u2019estr\u00e8s oxidatiu indu\u00eft pels raigs UV.<\/p>\n<blockquote><p>La vitamina E \u00e9s en realitat una fam\u00edlia de vuit subst\u00e0ncies de les quals l\u2019atocoferol \u00e9s la forma m\u00e9s abundant i biol\u00f2gicament activa al cos hum\u00e0<\/p><\/blockquote>\n<p>Els <strong>carotenoides<\/strong> s\u00f3n una fam\u00edlia de subst\u00e0ncies, entre elles els betacarotens o provitamina A, que s\u00f3n pigments vegetals presents a les fruites i les verdures. Els carotenoides m\u00e9s abundants a l\u2019organisme hum\u00e0 s\u00f3n el betacarot\u00e8, a-carot\u00e8 i licop\u00e8, aix\u00ed com la lute\u00efna, la zeaxantina i la criptoxantina. S\u00f3n potents antioxidants i fotoprotectors. La <strong>pastanaga, el pebrot i la carbassa<\/strong> s\u00f3n rics en betacarotens i el licop\u00e8 el podem trobar en aliments com <strong>tom\u00e0quet, s\u00edndria, taronja sanguina, aranja rosada, albercoc, gavarrera i guaiaba<\/strong>. La lute\u00efna es pot trobar a la <strong>col arrissada (kale), espinac, enciam roman, br\u00f2quil, carbass\u00f3, col de Brussel\u00b7les, bledes, api, esp\u00e0rrecs<\/strong>, etc.<\/p>\n<p>La criptoxantina \u00e9s present en aliments com <strong>mel\u00f3, pr\u00e9ssecs, nectarines, pomes, papaia, taronges<\/strong> i tamb\u00e9 en aliments d\u2019origen animal com el rovell de l\u2019ou i la mantega. Un cop prenem els carotenoides a la nostra alimentaci\u00f3 s\u00f3n transportats a la pell i s\u2019acumulen principalment a les capes m\u00e9s superficials, a l\u2019epidermis. La quantitat d\u2019aquests pigments dipositada a la pell \u00e9s proporcional a la ingesta diet\u00e8tica, com m\u00e9s ingerim, m\u00e9s en tenim. I curiosament els nivells m\u00e9s alts de carotenoides s\u00f3n a la cara, sobretot al front, i el palmell i dors de la m\u00e0. Segurament aix\u00f2 respon a la necessitat m\u00e9s elevada de protecci\u00f3 d\u2019aquelles zones que pr\u00e0cticament sempre estan exposades al Sol.<\/p>\n<figure id=\"attachment_80667\" aria-describedby=\"caption-attachment-80667\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-80667 size-full\" src=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2023\/08\/Dieta-y-fotoproteccion-2.jpg\" alt=\"Dieta i fotoprotecci\u00f3\" width=\"1000\" height=\"667\" srcset=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2023\/08\/Dieta-y-fotoproteccion-2.jpg 1000w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2023\/08\/Dieta-y-fotoproteccion-2-768x512.jpg 768w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2023\/08\/Dieta-y-fotoproteccion-2-696x464.jpg 696w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2023\/08\/Dieta-y-fotoproteccion-2-630x420.jpg 630w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption id=\"caption-attachment-80667\" class=\"wp-caption-text\">123rf Limited\u00a9peopleimages12. La pastanaga ens aporta betacarot\u00e8, aliat en protecci\u00f3 solar<\/figcaption><\/figure>\n<p>La <strong>vitamina E<\/strong> \u00e9s en realitat una fam\u00edlia de vuit subst\u00e0ncies de les quals l\u2019atocoferol \u00e9s la forma m\u00e9s abundant i biol\u00f2gicament activa al cos hum\u00e0. Aquest nutrient amb afinitat pel greix \u00e9s ben conegut pel seu paper protector de les membranes cel\u00b7lulars. Es troba a tots els vegetals, especialment a l\u2019<strong>oli d\u2019oliva verge extra, els cereals integrals, el germen de blat i a la fruita seca<\/strong>.<\/p>\n<p>La <strong>vitamina C<\/strong> \u00e9s un antioxidant efica\u00e7 i un element essencial en nombroses reaccions enzim\u00e0tiques, per exemple, en la formaci\u00f3 de les fibres de col\u00b7lagen que s\u00f3n part estructural important de la pell. La principal font de vitamina C a la dieta s\u00f3n les fruites, especialment <strong>els c\u00edtrics, el kiwi, cireres i melons, i verdures com tom\u00e0quets, verdures de fulla, br\u00f2quil, coliflor, cols de Brussel\u00b7les i col<\/strong>. Els nivells de vitamina E i C a l\u2019epidermis s\u00f3n m\u00e9s grans que a les capes m\u00e9s profundes de la pell (dermis), clarament per l\u2019alt requeriment d\u2019antioxidants que t\u00e9 aquesta zona m\u00e9s en contacte amb els raigs UV.<\/p>\n<blockquote><p>Menjar abundants vegetals de tots els colors \u00e9s una estrat\u00e8gia clau per mitigar els efectes de la radiaci\u00f3 UV<\/p><\/blockquote>\n<p>Els <strong>polifenols<\/strong> s\u00f3n una gran fam\u00edlia de subst\u00e0ncies presents als aliments vegetals, inclosos fruites, verdures, fruita seca, llegums i llavors. S\u00f3n fonts diet\u00e8tiques les <strong>cebes<\/strong> (flavonols); <strong>cacau, llavors de ra\u00efm<\/strong> (proantocianidines); <strong>te, pomes i vi negre<\/strong> (flavonols i catequines); <strong>fruites c\u00edtriques<\/strong> (flavanones); <strong>baies i cireres<\/strong> (antocianidines); i <strong>soja<\/strong> (isoflavones). La majoria dels polifenols naturals s\u00f3n pigments, t\u00edpicament grocs, vermells o morats, i poden absorbir la radiaci\u00f3 ultraviolada. Encara que nosaltres no els absorbim directament, la microbiota intestinal s\u00ed que ho fa produint derivats que s\u00f3n els que ens aporten m\u00faltiples beneficis, entre ells la protecci\u00f3 davant de la radiaci\u00f3 solar.<\/p>\n<p>S\u00f3n molts els estudis que confirmen aquests efectes, aix\u00ed, a m\u00e9s de l\u2019\u00fas de fotoprotectors externs, \u00e9s molt interessant aprofitar aquest gran potencial que tenen alguns nutrients i subst\u00e0ncies presents als aliments. Menjar abundants vegetals de tots els colors \u00e9s una estrat\u00e8gia clau per mitigar els efectes de la radiaci\u00f3 UV que condueix, no nom\u00e9s a possibles cremades a l\u2019estiu, sin\u00f3 a la protecci\u00f3 davant de malalties com el c\u00e0ncer de pell i davant del proc\u00e9s d\u2019envelliment propi per l\u2019exposici\u00f3 excessiva al Sol.<\/p>\n<p><strong>Autora:\u00a0<\/strong>Laura I. Arranz, Doctora en Nutrici\u00f3, farmac\u00e8utica i dietista-nutricionista<\/p>\n<p><a href=\"https:\/\/www.bioecoactual.com\/ca\/subscripcio\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Subscriu-te<\/strong><\/a><strong> a la Newsletter i rep cada mes Bio Eco Actual gratis al teu correu<\/strong><\/p>\n<p><strong><em>Bio Eco Actual<\/em><\/strong>, <em>el teu mensual 100% ecol\u00f2gic<\/em><strong><br \/>\nLlegir <\/strong><a href=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2023\/07\/BioEcoActual_Agost_2023.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Bio Eco Actual Agost 2023<\/strong><\/a><\/p>\n<p><iframe style=\"border: none; width: 100%; height: 520px;\" src=\"\/\/e.issuu.com\/embed.html?d=bioecoactual_agost_2023&amp;hideIssuuLogo=true&amp;showOtherPublicationsAsSuggestions=true&amp;u=bioecoactual\" allowfullscreen=\"allowfullscreen\"> <\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tots sabem que l&rsquo;exposici&oacute; excessiva al Sol pot desencadenar problemes a la pell a curt i llarg termini i associem la fotoprotecci&oacute; a l&rsquo;&uacute;s de productes t&ograve;pics que sens dubte s&oacute;n de gran utilitat. Per&ograve;, qu&egrave; pot fer la dieta per ajudar-nos en aix&ograve;?<\/p>\n","protected":false},"author":419,"featured_media":80664,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7166],"tags":[],"class_list":["post-80672","post","type-post","status-publish","format-standard","has-post-thumbnail","category-nutricio"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Dieta i fotoprotecci\u00f3 - Bio Eco Actual<\/title>\n<meta name=\"description\" content=\"Menjar abundants vegetals de tots els colors \u00e9s una estrat\u00e8gia clau per mitigar els efectes de la radiaci\u00f3 UV. 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