{"id":10034,"date":"2024-10-04T16:05:57","date_gmt":"2024-10-04T16:05:57","guid":{"rendered":"https:\/\/longchangextracts.com\/?p=10034"},"modified":"2024-10-04T16:05:57","modified_gmt":"2024-10-04T16:05:57","slug":"vitamin-b12-2","status":"publish","type":"post","link":"https:\/\/longchangextracts.com\/hu\/vitamin-b12-2\/","title":{"rendered":"Mi az a B12-vitamin t\u00e1pl\u00e1lkoz\u00e1si c\u00e9l\u00fa d\u00fas\u00edt\u00e1s\u00e1ra?"},"content":{"rendered":"

Mi az a B12-vitamin t\u00e1pl\u00e1lkoz\u00e1si c\u00e9l\u00fa d\u00fas\u00edt\u00e1s\u00e1ra?<\/h1>\n

Mi a B12-vitamin
\nA B12-vitamin (cianokobalamin) egy v\u00edzben old\u00f3d\u00f3 vitamin, m\u00e1s n\u00e9ven cianokobalamin, m\u00e1s n\u00e9ven \u00e1llati feh\u00e9rjet\u00e9nyez\u0151, a cianokobalaminhoz hasonl\u00f3 hat\u00f3anyagokat tartalmaz\u00f3 vitaminok csoportj\u00e1nak \u00e1ltal\u00e1nos megnevez\u00e9se. Ez az egyetlen v\u00edzben old\u00f3d\u00f3 vitamin, amely f\u00e9mionokat tartalmaz, \u00e9s az esszenci\u00e1lis vitaminok k\u00f6z\u00e9 tartozik. A B12-vitamin szintetikus term\u00e9ke a cianokobalamin, amely a kobalamin disszoci\u00e1ci\u00f3ja sor\u00e1n keletkezik. Ez egy v\u00f6r\u00f6s krist\u00e1ly, amely nagyon stabil, \u00e9s \u00e9lelmiszer-d\u00fas\u00edt\u00e1sra \u00e9s t\u00e1pl\u00e1l\u00e9kkieg\u00e9sz\u00edt\u00e9sre haszn\u00e1lj\u00e1k. A n\u00f6v\u00e9nyi sejtek nem k\u00e9pesek szintetiz\u00e1lni a B12-vitamint, ez\u00e9rt a legt\u00f6bb n\u00f6v\u00e9nyi \u00e9lelmiszer nem tartalmaz B12-vitamint, amely az \u00e1llati sz\u00f6vetekben koncentr\u00e1l\u00f3dik.
\nA B12-vitamin \u00e9lettani funkci\u00f3i
\n1. N\u00f6veli a folsav \u00e9s a folsav felhaszn\u00e1l\u00e1si ar\u00e1ny\u00e1t a metionin (homociszteinb\u0151l szintetiz\u00e1lt) \u00e9s a kolin szint\u00e9zis\u00e9vel egy\u00fctt, a purinok \u00e9s pirimidinek termel\u00e9s\u00e9t a cianokobalamin szint\u00e9zis\u00e9nek folyamat\u00e1ban Schein b\u00e1zis prekurzor anyagok, mint p\u00e9ld\u00e1ul a metilkobalamin \u00e9s a B12 koenzim, amely sz\u00e1mos fontos vegy\u00fclet metil\u00e1l\u00e1si folyamat\u00e1ban vesz r\u00e9szt. B12-vitamin-hi\u00e1nyban a metilcsoportok \u00e1tad\u00e1sa a metil-tetrahidrofol\u00e1tb\u00f3l cs\u00f6kken, ami a folsavat egy nem el\u00e9rhet\u0151 form\u00e1v\u00e1 alak\u00edtja, \u00e9s folsavhi\u00e1nyhoz vezet.
\n2. Az idegi mielin anyagcser\u00e9j\u00e9nek \u00e9s m\u0171k\u00f6d\u00e9s\u00e9nek fenntart\u00e1sa Ha a B12-vitamin hi\u00e1nyos, az neurol\u00f3giai hi\u00e1nyoss\u00e1gokat, gerincvel\u0151 degener\u00e1ci\u00f3t okozhat, \u00e9s s\u00falyos pszichi\u00e1triai t\u00fcneteket okozhat. A B12-vitamin hi\u00e1nya perif\u00e9ri\u00e1s neuritiszhez vezethet. A B 12-vitamin-hi\u00e1ny korai megnyilv\u00e1nul\u00e1sai gyermekekn\u00e9l a rendellenes hangulat, a tompa kifejez\u00e9s, a lass\u00fa reakci\u00f3 \u00e9s v\u00e9g\u00fcl a v\u00e9rszeg\u00e9nys\u00e9g.
\n3. El\u0151seg\u00edti a v\u00f6r\u00f6sv\u00e9rtestek fejl\u0151d\u00e9s\u00e9t \u00e9s \u00e9r\u00e9s\u00e9t az\u00e1ltal, hogy a metilmalonylkoenzim A-t szukcinilkoenzim A-v\u00e1 alak\u00edtja, amely r\u00e9szt vesz a trikarbonsavciklusban, amelyben a szukcinilkoenzim A a hemoglobin szint\u00e9zis\u00e9hez kapcsol\u00f3dik.
\n4. A B12-vitamin r\u00e9szt vesz a dezoxiribonukleinsav (DNS) szint\u00e9zis\u00e9ben, a zs\u00edrok, sz\u00e9nhidr\u00e1tok \u00e9s feh\u00e9rj\u00e9k anyagcser\u00e9j\u00e9ben, valamint n\u00f6veli a nukleinsavak \u00e9s feh\u00e9rj\u00e9k szint\u00e9zis\u00e9t.
\nB12-vitamin-hi\u00e1nyos betegs\u00e9g
\n1. A B12-vitamin-hi\u00e1ny gyakori okai (1) el\u00e9gtelen bevitel, p\u00e9ld\u00e1ul tart\u00f3s veget\u00e1ri\u00e1nusok; (2) szerzett felsz\u00edv\u00f3d\u00e1si zavar, p\u00e9ld\u00e1ul hasny\u00e1lmirigy-, gyomor-, m\u00e1j- vagy b\u00e9lbetegs\u00e9gek; (3) fokozott B12-vitamin-ig\u00e9ny, p\u00e9ld\u00e1ul terhess\u00e9g, sz\u00fcl\u00e9s ut\u00e1ni id\u0151szak, galandf\u00e9rgek stb.; (4) velesz\u00fcletett akad\u00e1lyok a B12-vitamin anyagcsere l\u00e9pcs\u0151j\u00e9ben, p\u00e9ld\u00e1ul bels\u0151 t\u00e9nyez\u0151k velesz\u00fcletett hi\u00e1nya. (5) Farmakogenetikai: vizsg\u00e1latok szerint az or\u00e1lis metformin alacsonyabb sz\u00e9rum B12-vitamin-szinthez vezet.
\n2. A B12-vitamin-hi\u00e1ny gyakori betegs\u00e9gei A B12-vitamin-hi\u00e1ny els\u0151sorban a v\u00e9rben, az anyagcser\u00e9ben \u00e9s az idegrendszerben jelentkezik, ami hiperhomocisztein\u00e9mi\u00e1hoz (Hhcy), pernici\u00f3zus an\u00e9mi\u00e1hoz, szubakut kombin\u00e1lt degener\u00e1ci\u00f3hoz, ment\u00e1lis depresszi\u00f3hoz, metilmalonsavhi\u00e1nyhoz, vaszkul\u00e1ris demenci\u00e1hoz, Alzheimer-k\u00f3rhoz \u00e9s m\u00e1s betegs\u00e9gekhez vezethet.
\n3. A B12-vitamin toxicit\u00e1sa viszonylag alacsony a napi 100\u03bcg-os sz\u00e1jon \u00e1t t\u00f6rt\u00e9n\u0151 szed\u00e9sekr\u0151l sz\u00f3l\u00f3 jelent\u00e9sek szerint, nincs jelent\u0151s mell\u00e9khat\u00e1s. Megjegyz\u00e9s: A B12-vitamin t\u00e1pl\u00e1lts\u00e1gi \u00e1llapota meghat\u00e1rozhat\u00f3 a sz\u00e9rum B12-vitamin-koncentr\u00e1ci\u00f3, a sz\u00e9rum holotranszcobalamin II (holo Tc II), a sz\u00e9rum holok\u00f6t\u0151 cochineal, a sz\u00e9rum homocisztein \u00e9s metilmalonsav vizsg\u00e1lat\u00e1val.
\nReferenciabevitel \u00e9s \u00e9lelmiszerforr\u00e1sok
\nAz emberi szervezetnek nagyon kev\u00e9s B12-vitaminra van sz\u00fcks\u00e9ge. A B12-vitamin aj\u00e1nlott \u00e9trendi beviteli \u00e9rt\u00e9ke (RDA) 0,9 \u03bcg\/nap kora gyermekkorban \u00e9s 2,4 \u03bcg\/nap feln\u0151ttkorban, ami elegend\u0151 a lakoss\u00e1g 97,5% r\u00e9sz\u00e9nek sz\u00fcks\u00e9glet\u00e9nek kiel\u00e9g\u00edt\u00e9s\u00e9re. A terhes n\u0151k RDA-\u00e9rt\u00e9ke napi 6 \u03bcg, \u00e9s b\u00e1r az id\u0151sek RDA-\u00e9rt\u00e9k\u00e9t nem emelt\u00e9k meg, \u0151k hajlamosak a B12-vitamin felsz\u00edv\u00f3d\u00e1si zavar\u00e1ra, \u00e9s aj\u00e1nlott n\u00f6velni a B12-vitaminnal d\u00fas\u00edtott \u00e9lelmiszerek vagy \u00e9trend-kieg\u00e9sz\u00edt\u0151k fogyaszt\u00e1s\u00e1t. A B12-vitaminra javasolt AI 2,4 \u03bcg\/nap feln\u0151ttek sz\u00e1m\u00e1ra.
\nAz \u00e9trendi B12-vitamin \u00e1llati eredet\u0171 \u00e9lelmiszerekb\u0151l sz\u00e1rmazik, a f\u0151 \u00e9lelmiszerforr\u00e1sok a h\u00fas, \u00e1llati bels\u0151s\u00e9gek, halak, baromfi, kagyl\u00f3k \u00e9s toj\u00e1s, kisebb mennyis\u00e9gben pedig a tej \u00e9s a tejterm\u00e9kek (1. t\u00e1bl\u00e1zat). A n\u00f6v\u00e9nyi \u00e9lelmiszerek l\u00e9nyeg\u00e9ben nem tartalmaznak B12-vitamint.
\n1. t\u00e1bl\u00e1zat A kiv\u00e1lasztott \u00e9lelmiszerek B12-vitamin-tartalma (\u03bcg\/100g)<\/p>\n

\"\"<\/p>\n

Megjegyz\u00e9s: Id\u00e9zi: Ensminger AH et al. 1989.American Encyclopedia of Food and Nutrition Selected (5) Food Composition.
\nA B12-vitamin mint t\u00e1panyag-adal\u00e9kanyag mely \u00e9lelmiszerekben haszn\u00e1lhat\u00f3 fel<\/p>\n

\"\"<\/p>","protected":false},"excerpt":{"rendered":"

What is Vitamin B12 for Nutritional Enrichment? What is Vitamin B12 Vitamin B12 (Cyanocobalamin) is a water-soluble vitamin also known as cyanocobalamin, also known as animal protein factor, is a general term for a group of vitamins containing active substances similar to cyanocobalamin. It is the only water-soluble vitamin that contains metal ions and is […]<\/p>","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"yoast_head":"\nWhat is Vitamin B12 for Nutritional Enrichment? - China Chemical Manufacturer<\/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:\/\/longchangextracts.com\/hu\/vitamin-b12-2\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Vitamin B12 for Nutritional Enrichment? - China Chemical Manufacturer\" \/>\n<meta property=\"og:description\" content=\"What is Vitamin B12 for Nutritional Enrichment? 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