{"id":4051,"date":"2020-10-22T11:55:16","date_gmt":"2020-10-22T09:55:16","guid":{"rendered":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/?p=4051"},"modified":"2020-11-16T14:24:25","modified_gmt":"2020-11-16T13:24:25","slug":"obsah-vitaminu-a-mineralu-v-potravinach","status":"publish","type":"post","link":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/2020\/10\/22\/obsah-vitaminu-a-mineralu-v-potravinach\/","title":{"rendered":"Je pravda, \u017ee obsah vitamin\u016f a miner\u00e1l\u016f v potravin\u00e1ch drasticky kles\u00e1?"},"content":{"rendered":"

Ze v\u0161ech stran sly\u0161\u00edme mantru o tom, \u017ee j\u00eddlo p\u0159est\u00e1v\u00e1 obsahovat cokoli v\u00fd\u017eivn\u00e9ho. Opravdu m\u00e1me j\u00edst osmkr\u00e1t tolik ovoce, abychom do sebe dostali aspo\u0148 krapet toho zdrav\u00ed\u010dka? Nebo se obsah vitamin\u016f a miner\u00e1l\u016f v potravin\u00e1ch zase tak dramaticky nezm\u011bnil?<\/b><\/p>\n

Mo\u017en\u00e1 u\u017e jste taky vid\u011bli n\u011bjakou tu infografiku s barevn\u00fdmi ilustracemi ovoce a varov\u00e1n\u00edm ohledn\u011b obsahu \u017eivin. Nazna\u010duj\u00ed t\u0159eba, \u017ee dnes mus\u00edme sn\u00edst a\u017e sm\u011b\u0161n\u011b velkou d\u00e1vku osmi pomeran\u010d\u016f m\u00edsto jednoho, abychom do sebe dostali <\/span>s<\/span><\/a>tejn\u011b mikro\u017eivin jako p\u0159ed pades\u00e1ti lety<\/span>. Nebo \u017ee obsah \u017eeleza v jablk\u00e1ch klesl tak drasticky, \u017ee nam\u00edsto jednoho jich mus\u00edme spo\u0159\u00e1dat <\/span>rovnou dvacet \u0161est<\/span>.<\/span><\/p>\n

Opravdu je p\u016fda vy\u010derpan\u00e1?<\/b><\/h2>\n

Internet je pln\u00fd studi\u00ed, kter\u00e9 tvrd\u00ed, \u017ee \u017eiviny v p\u016fd\u011b jsou vy\u010derpan\u00e9. Oh\u00e1n\u00ed se jimi i <\/span>Scientific American<\/span><\/a>. Nedostatek vitamin\u016f a miner\u00e1l\u016f v zemin\u011b se podle nich prom\u00edt\u00e1 tak\u00e9 do na\u0161\u00ed stravy. Pak je ale t\u0159eba <\/span>nez\u00e1visl\u00e1 metaanal\u00fdza<\/span><\/a> publikovan\u00e1 v Journal of Food Composition and Analysis, kter\u00e1 tyto novodob\u00e9 m\u00fdty zm\u00edr\u0148uje.<\/span><\/p>\n

Jej\u00ed autor a odborn\u00edk na v\u00fd\u017eivu Robin James Marles poukazuje na to, \u017ee v\u00fdpo\u010dty nejsou tak jednoduch\u00e9, jak se m\u016f\u017ee zd\u00e1t. U\u017e kv\u016fli obrovsk\u00fdm p\u0159irozen\u00fdm odchylk\u00e1m v r\u00e1mci r\u016fzn\u00fdch druh\u016f ovoce, zeleniny nebo obilovin. Nav\u00edc podle n\u011bj n\u011bkter\u00e9 studie ukazuj\u00ed mal\u00fd pokles v obsahu n\u011bkter\u00fdch prvk\u016f, jin\u00e9 naopak r\u016fst (\u00fadajn\u011b d\u00edky hnojen\u00ed) a dal\u0161\u00ed zase, \u017ee je to st\u00e1le stejn\u00e9.<\/span><\/p>\n

Dokonce se ani neprok\u00e1zal rozd\u00edl v obsahu miner\u00e1l\u016f u rostlin hnojen\u00fdch chemicky a t\u011bch, kter\u00e9 se hnoj\u00ed bio hnojem. Citeln\u011bj\u0161\u00ed rozd\u00edl v obsahu \u017eivin je pak sp\u00ed\u0161 zp\u016fsoben jin\u00fdm typem rostlin. Modern\u00ed trpasli\u010d\u00ed odr\u016fdy maj\u00ed v sob\u011b v\u00edc vody a \u0161krobu. Maj\u00ed sice v\u011bt\u0161\u00ed \u00farodu, ale z\u00e1rove\u0148 se v nich mikronutrienty m\u00edrn\u011b \u201ena\u0159ed\u00ed\u201c.<\/span><\/p>\n

M\u016f\u017ee za to i CO<\/b>2<\/b>. Co\u017ee? U\u017e zase?<\/b><\/h2>\n

Zd\u00e1 se b\u00fdt nesmysl, \u017ee v\u00edc oxidu uhli\u010dit\u00e9ho v atmosf\u00e9\u0159e by mohlo rostlin\u00e1m ubl\u00ed\u017eit. Je to p\u0159ece jedna z hlavn\u00edch slo\u017eek, kter\u00e9 pou\u017e\u00edvaj\u00ed k r\u016fstu. Uk\u00e1zalo se v\u0161ak, \u017ee p\u0159\u00edli\u0161 mnoho CO<\/span>2<\/span> je pro rostliny podobn\u011b nezdrav\u00e9 jako p\u0159\u00edli\u0161 mnoho cukru pro \u010dlov\u011bka. CO<\/span>2<\/span> toti\u017e rostliny \u201enapumpuje\u201c, a mikronutrienty se t\u00edm zase na\u0159ed\u00ed.<\/span><\/p>\n

Celkov\u00fd po\u010det \u017eivin m\u016f\u017ee b\u00fdt stejn\u00fd, ale ve v\u011bt\u0161\u00ed rostlin\u011b je jich \u201ena kilo hmoty\u201c m\u00e9n\u011b. <\/span>Teorie mluv\u00ed a\u017e o 8% zm\u011bn\u011b<\/span><\/a> v pom\u011bru sacharid\u016f k miner\u00e1l\u016fm. Rostlinn\u00e1 strava se s trochu nads\u00e1zky st\u00e1v\u00e1 nezdrav\u00fdm j\u00eddlem. Zbytek toho, \u010d\u00edm jsou rostliny napumpov\u00e1ny, jsou toti\u017e pr\u00e1v\u011b ty sacharidy. Dobr\u00e9 v\u011bd\u011bt, pokud zrovna p\u0159ech\u00e1z\u00edte na veganskou dietu.<\/span><\/p>\n

\"Nejv\u00edc
Nejv\u00edc \u017eivin je v ovoci a zelenin\u011b, kdy\u017e se sklid\u00ed. Tak\u017ee je nejlep\u0161\u00ed kupovat ty lok\u00e1ln\u00ed a zdl\u00e1bnout je co nejd\u0159\u00edv.<\/figcaption><\/figure>\n

Chemie a chlazen\u00e9 j\u00eddlo<\/b><\/h2>\n

Pohodln\u00e1 pr\u016fmyslov\u00e1 v\u00fdroba je zalo\u017eena na kombinaci chemick\u00fdch hnojiv a herbicid\u016f. To je zp\u016fsob, jak p\u011bstovat levn\u011b. Jen\u017ee sou\u010dasn\u011b intuitivn\u011b c\u00edt\u00edme, \u017ee<\/span> j\u00eddlo dnes u\u017e nem\u00e1 v\u016fni a chu\u0165. Ovoce a zelenina nedozr\u00e1vaj\u00ed na slunci, ale skl\u00edzej\u00ed se nezral\u00e9. A to se projevuje na obsahu \u017eivin. Samotn\u00e1 logistika a kult chlazen\u00fdch potravin z druh\u00e9ho konce sv\u011bta tak na kvalit\u011b ub\u00edraj\u00ed mnohem v\u00edce ne\u017e probl\u00e9m s p\u016fdou nebo oxid uhli\u010dit\u00fd.<\/span><\/p>\n

Obsah vitamin\u016f a miner\u00e1l\u016f v potravin\u00e1ch je na maximu p\u0159esn\u011b ve chv\u00edli, kdy se sklid\u00ed. Potom to u\u017e jen kles\u00e1. Nap\u0159\u00edklad \u0161pen\u00e1t za t\u00fdden p\u0159i pokojov\u00e9 teplot\u011b ztrat\u00ed 100 % vitaminu C. Pokud je skladov\u00e1n p\u0159i teplot\u011b 20 \u00b0C, ztr\u00e1c\u00ed 75 %. Je to proto, \u017ee jeho listy jsou velice tenk\u00e9, a rychle tak podl\u00e9h\u00e1 oxidaci, tedy zk\u00e1ze. Na druh\u00e9 stran\u011b \u017eeb\u0159\u00ed\u010dku je mrkev, kter\u00e1 p\u0159ich\u00e1z\u00ed jen o 27 % vitaminu C. Ve srovn\u00e1n\u00ed s t\u00edm pak procenta spojen\u00e1 s \u00fadajn\u00fdm vy\u010derp\u00e1n\u00edm p\u016fdy ztr\u00e1cej\u00ed na nal\u00e9havosti.<\/span><\/p>\n

Tak\u017ee co pro sebe m\u016f\u017eeme ud\u011blat?<\/b><\/h2>\n

Dost stra\u0161en\u00ed. Rozhodn\u011b nemus\u00edte p\u0159estat j\u00edst ovoce a zeleninu, ale ani je do sebe nemus\u00edte l\u00e1dovat po kilech, jak rad\u00ed ty infografiky zm\u00edn\u011bn\u00e9 na za\u010d\u00e1tku \u010dl\u00e1nku. D\u016fle\u017eit\u00fd je zp\u016fsob skladov\u00e1n\u00ed, sklize\u0148 je\u0161t\u011b p\u0159ed zralost\u00ed a v\u00fdb\u011br odr\u016fd.<\/span> Tohle jsou v\u011bci, kter\u00e9 sice \u00fapln\u011b neovlivn\u00edme, ale aspo\u0148 m\u00e1me ten luxus, \u017ee si m\u016f\u017eeme vybrat, co kupujeme. Ide\u00e1ln\u011b sezonn\u00ed a lok\u00e1ln\u00ed potraviny \u2013 to je to hlavn\u00ed. Vitaminovou matematiku pak m\u016f\u017eeme nechat stranou.<\/span><\/p>\n

Pokles kvality potravin kv\u016fli zni\u010den\u00e9mu prost\u0159ed\u00ed je sice l\u00e1kav\u00e1 medi\u00e1ln\u00ed zkratka, ale dne\u0161n\u00edho \u010dlov\u011bka v\u00edc ohro\u017euje p\u0159ej\u00edd\u00e1n\u00ed, j\u00eddeln\u00ed\u010dek, ve kter\u00e9m p\u0159eva\u017euj\u00ed pr\u016fmyslov\u011b zpracovan\u00e1 j\u00eddla, nebo sedav\u00fd \u017eivotn\u00ed styl. A \u00fapln\u011b nejd\u016fle\u017eit\u011bj\u0161\u00ed je db\u00e1t na svoje zdrav\u00ed<\/a> a prevenci celkov\u011b. J\u00edst pest\u0159e, h\u00fdbat se, chodit k doktorovi, posilovat imunitu. \u010c\u00edm d\u0159\u00edv za\u010dnete, t\u00edm l\u00edp zvl\u00e1dnete ka\u017edou dal\u0161\u00ed zimu.<\/span><\/p>\n

\n

Neodkl\u00e1dat prevenci, to je i na\u0161e nepsan\u00e9 heslo. Proto v\u00e1m v r\u00e1mci preven\u010dn\u00edho programu vrac\u00edme a\u017e 20 % pojistn\u00e9ho za to, \u017ee sportujete, 5 % za pravideln\u00e9 kontroly u l\u00e9ka\u0159e a 5 % za to, \u017ee nekou\u0159\u00edte.<\/i><\/b><\/p>\n

V\u0161e o programu<\/a><\/div><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Ze v\u0161ech stran sly\u0161\u00edme mantru o tom, \u017ee j\u00eddlo p\u0159est\u00e1v\u00e1 obsahovat cokoli v\u00fd\u017eivn\u00e9ho. Opravdu m\u00e1me j\u00edst osmkr\u00e1t tolik ovoce, abychom do sebe dostali aspo\u0148 krapet toho zdrav\u00ed\u010dka? Nebo se obsah vitamin\u016f a miner\u00e1l\u016f v potravin\u00e1ch zase tak dramaticky nezm\u011bnil? Mo\u017en\u00e1 u\u017e jste taky vid\u011bli n\u011bjakou tu infografiku s barevn\u00fdmi ilustracemi ovoce a varov\u00e1n\u00edm ohledn\u011b obsahu …<\/p>\n","protected":false},"author":28,"featured_media":4088,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28,30,5],"tags":[427,447,41,248,136],"class_list":["post-4051","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-stravovani","category-zdravi","category-zivotni-styl","tag-mineraly","tag-prevence","tag-stravovani","tag-vitaminy","tag-zdrave-jidlo"],"_links":{"self":[{"href":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/wp-json\/wp\/v2\/posts\/4051","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/wp-json\/wp\/v2\/users\/28"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/wp-json\/wp\/v2\/comments?post=4051"}],"version-history":[{"count":6,"href":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/wp-json\/wp\/v2\/posts\/4051\/revisions"}],"predecessor-version":[{"id":4091,"href":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/wp-json\/wp\/v2\/posts\/4051\/revisions\/4091"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/wp-json\/wp\/v2\/media\/4088"}],"wp:attachment":[{"href":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/wp-json\/wp\/v2\/media?parent=4051"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/wp-json\/wp\/v2\/categories?post=4051"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.new.prod.mutu.creativedock.cloud\/blog\/wp-json\/wp\/v2\/tags?post=4051"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}