{"id":29807,"date":"2017-12-15T07:30:51","date_gmt":"2017-12-15T06:30:51","guid":{"rendered":"http:\/\/www.invarena.cz\/?p=29807"},"modified":"2017-12-15T17:47:30","modified_gmt":"2017-12-15T16:47:30","slug":"dusicnany-v-ovoci-a-zelenine","status":"publish","type":"post","link":"https:\/\/www.invarena.cz\/?p=29807","title":{"rendered":"Dusi\u010dnany v ovoci a zelenin\u011b"},"content":{"rendered":"<p><strong>Dusi\u010dnany v ovoci a zelenin\u011b. Co m\u016f\u017ee zp\u016fsobit jejich nadm\u011brn\u00e1 konzumace?<\/strong><!--more--><\/p>\n<p>Kolik dusi\u010dnan\u016f v zelenin\u011b \u010di ovoci je, to z\u00e1le\u017e\u00ed nejen na jejich obsahu v p\u016fd\u011b a zp\u016fsobu hnojen\u00ed, ale t\u0159eba i na sv\u011bteln\u00fdch podm\u00ednk\u00e1ch. Plat\u00ed, \u017ee \u010d\u00edm je sv\u011btla m\u00e9n\u011b, t\u00edm v\u00edc je v potravin\u00e1ch dusi\u010dnan\u016f &#8211; proto byste m\u011bli b\u00fdt p\u0159i stravov\u00e1n\u00ed opatrn\u00ed p\u0159edev\u0161\u00edm na mno\u017estv\u00ed konzumace tzv. rychlen\u00e9 zeleniny, kter\u00e1 se objev\u00ed na trhu hned po zim\u011b, kdy je sv\u011btla nedostatek. Nejv\u00edc dusi\u010dnan\u016f je obecn\u011b v listov\u00e9 zelenin\u011b &#8211; \u0159edkvi\u010dk\u00e1ch, cuket\u011b, \u0161pen\u00e1tu, hl\u00e1vkov\u00e9m sal\u00e1tu, kapust\u011b, kv\u011bt\u00e1ku a zel\u00ed. Obsah dusi\u010dnan\u016f nen\u00ed stejn\u00fd ve v\u0161ech \u010d\u00e1stech zeleniny, v hutn\u011bj\u0161\u00edch \u010d\u00e1stech, tedy nap\u0159\u00edklad v ko\u0161\u0165\u00e1lech, je jich v\u00edce.<\/p>\n<p><strong>P\u00e1r rad<\/strong><\/p>\n<p>Pokud chcete s p\u0159\u00edjmem dusi\u010dnan\u016f bojovat, omezte p\u0159\u00edjem rychlen\u00e9 zeleniny, hlavn\u011b listov\u00e9. Pokud se p\u0159eci jen rozhodnete pro jej\u00ed konzumaci, zbavte se ko\u0161\u0165\u00e1l\u016f a stonk\u016f. Obecn\u011b je nejv\u00edc dusi\u010dnan\u016f u ko\u0159ene a stopky, u mrkve ve vnit\u0159n\u00edm v\u00e1lci. Uva\u0159en\u00edm se obsah dusi\u010dnan\u016f sni\u017euje a\u017e o 75 % &#8211; ov\u0161em za cenu ztr\u00e1ty vitaminu C. A v neposledn\u00ed \u0159ad\u011b v\u00edc dusi\u010dnan\u016f je v zelenin\u011b v zim\u011b, m\u00e9n\u011b v l\u00e9t\u011b, vy\u0161\u0161\u00ed obsah toti\u017e maj\u00ed plodiny ze sklen\u00edk\u016f.<\/p>\n<p><strong>P\u0159\u00edtomnost dusi\u010dnan\u016f<\/strong><\/p>\n<p>Nejv\u011bt\u0161\u00ed d\u00e1vku dusi\u010dnan\u016f dostanete z vody. D\u00e1le z nakl\u00e1dan\u00fdch mas, tvrd\u00fdch s\u00fdr\u016f \u010di konzerv, pokud se p\u0159i jejich v\u00fdrob\u011b pou\u017e\u00edvaj\u00ed dusi\u010dnany a dusitany jako aditiva, zaru\u010duj\u00edc\u00ed p\u011bknou barvu \u010di del\u0161\u00ed trvanlivost (dusitan draseln\u00fd &#8211; E249, dusitan sodn\u00fd &#8211; E250, dusi\u010dnan sodn\u00fd &#8211; E251). N\u00e1sleduje pr\u00e1v\u011b ji\u017e zmi\u0148ovan\u00e9 ovoce a zelenina.<\/p>\n<p><strong>Dusi\u010dnany<\/strong> jsou v\u0161ude kolem n\u00e1s. Jsou p\u0159\u00edtomny v p\u016fd\u011b, ve vod\u011b, ale i v ovoci a zelenin\u011b. Odborn\u00edci doporu\u010duj\u00ed jejich hodnoty v j\u00eddle hl\u00eddat, proto\u017ee nadm\u011brn\u00fd a dlouhodob\u00fd p\u0159\u00edjem dusi\u010dnan\u016f zvy\u0161uje \u0161ance na onemocn\u011bn\u00ed rakovinou, cukrovkou \u010di Alzheimerovou chorobou. S rozpozn\u00e1n\u00edm hladiny dusi\u010dnan\u016f v j\u00eddle pom\u00e1h\u00e1 specializovan\u00fd p\u0159\u00edstroj Greentest Eco. Ten nejen pom\u016f\u017ee odhalit p\u0159\u00edpadn\u00e9 vysok\u00e9 hodnoty, ale um\u00ed tak\u00e9 rozpoznat m\u00edru \u010derstvosti potravin.<\/p>\n<p>V organismu se dusi\u010dnany rozkl\u00e1daj\u00ed na dusitany a mohou se m\u011bnit na rakovinotvorn\u00e9 nitrosaminy. Mohou se rozlo\u017eit i na oxidy dus\u00edku, kter\u00e9 se v\u00e1\u017eou na hemoglobin a zp\u016fsobuj\u00ed omezen\u00fd p\u0159enos kysl\u00edku v krvi, co\u017e m\u016f\u017ee v p\u0159\u00edpad\u011b kojenc\u016f zp\u016fsobit i smrt. Byly t\u00e9\u017e nalezeny souvislosti mezi vysok\u00fdmi d\u00e1vkami dusi\u010dnan\u016f a Alzheimerovou chorobou, rakovinou st\u0159ev a kone\u010dn\u00edku. To v\u0161e plat\u00ed p\u0159i vysok\u00fdch koncentrac\u00edch, tedy p\u0159i st\u00e1l\u00e9 a intenzivn\u00ed konzumaci.<\/p>\n<p>Podle doporu\u010den\u00fdch hodnot maxim\u00e1ln\u00edho denn\u00edho p\u0159\u00edjmu podle Sv\u011btov\u00e1 zdravotnick\u00e1 organizace (WHO) byl kalibrov\u00e1n p\u0159\u00edstroj Greentest Eco, d\u00edky n\u011bmu\u017e je mo\u017en\u00e9 d\u00e1vku dusi\u010dnan\u016f v jednotliv\u00fdch \u010d\u00e1stech potravin p\u0159esn\u011b zjistit. P\u0159\u00edstroj je vybaven sondou, m\u011b\u0159en\u00ed tedy nen\u00ed nijak slo\u017eit\u00e9 a zvl\u00e1dne ho kdokoli. V\u00fdsledky jsou stanovov\u00e1ny na z\u00e1klad\u011b koncentrace sol\u00ed v testovan\u00fdch produktech. Limitn\u00ed hodnoty pro ka\u017ed\u00fd druh produktu maj\u00ed z\u00e1klad v evropsk\u00fdch, americk\u00fdch a asijsk\u00fdch standardech a doporu\u010den\u00edch. P\u0159esnost m\u011b\u0159en\u00ed je a\u017e 90 %, co\u017e bylo prok\u00e1z\u00e1no testy v laborato\u0159\u00edch v \u010c\u00edn\u011b, Hong Kongu a na Tchaj-wanu. Na \u010desk\u00e9m trhu je k dispozici n\u011bkolik produkt\u016f, kter\u00e9 jsou schopn\u00e9 hodnoty dusi\u010dnan\u016f v j\u00eddle zm\u011b\u0159it, jedn\u00edm z nich je nap\u0159\u00edklad zm\u00edn\u011bn\u00fd Greentest Eco, viz http:\/\/www.anmez.cz\/.<\/p>\n<p>D\u00edky v\u00fdsledk\u016fm testu lze vyhodnotit tak\u00e9 \u010derstvost ovoce. \u010cerstvost je n\u011bco, co nelze v\u017edy jednozna\u010dn\u011b poznat podle vzhledu. N\u011bkter\u00e9 ovoce m\u016f\u017ee b\u00fdt skladov\u00e1no v lednici i m\u011bs\u00edce po sklizni nebo b\u00fdt upraveno konzervanty a chemik\u00e1liemi, d\u00edky nim\u017e vypad\u00e1 \u010derstv\u011b. Vysok\u00e1 \u00farove\u0148 dusi\u010dnan\u016f nazna\u010duje, \u017ee ovoce nen\u00ed \u010derstv\u00e9, proto\u017ee ty se uvol\u0148uj\u00ed b\u011bhem skladov\u00e1n\u00ed, kdy\u017e se ovoce za\u010d\u00edn\u00e1 rozkl\u00e1dat.<\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>Dusi\u010dnany v ovoci a zelenin\u011b. Co m\u016f\u017ee zp\u016fsobit jejich nadm\u011brn\u00e1 konzumace?<\/p>\n<\/div>","protected":false},"author":1,"featured_media":29248,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-29807","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zpravy"],"_links":{"self":[{"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/posts\/29807","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=29807"}],"version-history":[{"count":0,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/posts\/29807\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=\/wp\/v2\/media\/29248"}],"wp:attachment":[{"href":"https:\/\/www.invarena.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=29807"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29807"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.invarena.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29807"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}