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Sinktilskudd kan fremme hjertets helse

- og mye mer

Sinktilskudd kan fremme hjertets helseSporstoffet sink er nødvendig for cirka 300 enzymer som regulerer stoffskiftet, fruktbarheten, nervesystemet, immunsystemet og en lang rekke andre funksjoner. Et forskerteam fra Technical University of Munich (TUM) har nå funnet ut at det er en tett sammenheng mellom kroppens sinkstatus og hjertefunksjonen. Selv om klinisk sinkmangel er sjelden, er kortsiktig eller subklinisk sinkmangel mer utbredt enn tidligere antatt. Selv en mindre mangel på sink kan derfor gå utover hjertes helse og de mange enzymprosessene som er avhengige av sink. Sink er også en viktig antioksidant som beskytter cellene mot oksidativt stress. Så det er flere grunner til at vi bør ha nok av dette mineralet.

Kroppen er utsatt for oksidativt stress når det er ubalanse mellom de frie radikalene og antioksidanter. Frie radikaler er et biprodukt av cellenes oksygenomsetning, og mengden øker etter hvert som vi blir eldre, ved stress, inflammasjoner, forgiftning, og eksponering for tobakksrøyk. Frie radikaler er aggressive molekyler som bidrar til celleskader, sykdom og forfall. Det eneste forsvar vi har mot de frie radikalene er forskjellige antioksidanter som vitamin A, C og E, sink, selen, Q10 og et antall plantestoffer.
Det har tidligere vist seg at alvorlig mangel på sink forårsaker alvorlige kliniske symptomer og økt oksidativt stress i cellene. Men kraftig sinkmangel er svært sjeldent. Ikke desto mindre er kortvarig eller subklinisk mangel på sink meget utbredt, særlig blant utsatte grupper som veganere, vegetarianere og eldre. Imidlertid har forskningen hittil vært sparsom når det gjelder sinks innflytelse på oksidativt stress og hjertes helse.

Veganere, vegetarianere og eldre får lettere sinkmangel. P-piller, flere typer medisiner og visse sykdommer, øker også risikoen for sinkmangel.

Hjertet er mer følsomt for oksidativt stress

Forskerteamet fra Technical University of Munich studerte hjertemuskelen på grunn av sitt aktive stoffskifte, som gjør at hjertet kan trekke seg sammen cirka 100.000 ganger om dagen, for å pumpe blod gjennom hele kroppen. Et høyt energiforbruk gir automatisk en høyere produksjon av frie radikaler. Det ser også ut til at hjertet har en lavere antioksidantkapasitet, sammenlignet med andre vev. Derfor er hjertet spesielt følsomt for oksidativt stress.
Forskerne undersøkte problemet ved å måle kroppens sinkstatus og sammenligne det med hjertemuskelens innhold av to andre antioksidanter, glutation og vitamin E (alfa-tokoferol), som begge er ansvarlige for å beskytte cellemembranen.

Oksidativt stress reguleres av kroppens sinkstatus

Siden sink er et sporstoff vi kun trenger ørsmå mengder av gjennom kosten, kunne forskerne fremprovosere sinkmangel i ulike grader hos grisunger i løpet av få dager. Deretter kunne forskerne undersøke hvordan større eller mindre sinkmangel påvirket dyrets hjertemuskulatur. Forskerne bemerket at konsentrasjonen av glutation og vitamin E i hjertemuskelen falt i takt med kroppens avtagende sinkstatus. Det ble også funnet at sinktilskudd kan øke hjertets evne til å motstå oksidativt stress på et meget tidlig stadium. Derfor kan tilskudd med sink være avgjørende, da oksidativt stress disponerer for hjerte- og karsykdommer, ifølge flere publiserte studier.

Sinkmangel forårsaker sårbare celler og økt risiko for inflammasjoner.

Forskerne observerte videre at de gener som er ansvarlige for at utslitte og syke celler begår selvmord (apoptose), oppreguleres i takt med fallende sinknivåer. Med andre ord blir cellene mer sårbare og går raskere til grunne. Ifølge forskningsleder Daniel Brugger, var smågrisenes organer ikke lenger i stand til å kompensere for et lavt inntak av sink, selv om studien varte bare noen få dager.
Etter den første fasen av sinkmangel oppdaget forskerne at hjertemuskelen økte sitt eget sinkinnhold. Imidlertid oppstod denne økningen av sink i hjertemuskelen på bekostning av sinkinnhold i andre organer, og da spesielt lever, nyrer og bukspyttkjertel. Studien er publisert i Journal of Nutrition. Forskningsgruppen refererer også til andre studier som viser at kroppens avtagende sinknivå er assosiert med subklinisk inflammasjon. Dette påvirker også kretsløpet, immunsystemet og andre organer.

Sinkmangel er utbredt av flere grunner

Sinkmangel skyldes hovedsakelig ensidige kostvaner og mangel på animalske proteiner, som vanligvis er gode sinkkilder. I tillegg bør forbruket av jern og kalsium samt alkohol nevnes. Kraftig svetting, aldring, cøliaki, diaré, en dårlig regulert diabetes og andre sykdommer kan også forårsake sinkmangel. Det samme gjelder for flere typer legemidler, slik som vanndrivende medisin, ACE-hemmere, syrenøytraliserende medisin, kortikosteroider, antibiotika og p-piller.

Det anslås at 25% av verdens befolkning har sinkmangel, som grovt deles inn i lett, medium og alvorlig.

Kilder og tilskudd

Det er spesielt sink i østers, lever, kjøtt, sjømat, meieriprodukter, nøtter, frø, korn og bønner. Sink absorberes best fra animalske kilder. Ved mistanke om sinkmangel bør man inkludere flere gode sinkkilder i kostholdet og muligens supplere med enkle tilskudd. Det er også mulig å måle sinkmangel gjennom en blodprøve, og ved mangel på sink kan man ta større doser gjennom et tilskudd.

Kilder:

Daniel Brugger and Wilhelm M. Windisch: Short-Term Subclinical Zink Deficiency in Weaned Piglets Affects Cardic Redox Metabolism and Zinc Concentration. Journal of Nutrition 2017
https://www.eurekalert.org/pub_releases/2017-04/tuom-zsa041817.php

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  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `has_categories` AS `s` INNER JOIN `has_categories` AS `c` ON (`s`.`lft` < `c`.`lft` AND `c`.`lft` < `s`.`rgt` AND `c`.`language` IN (:preparedArray3,:preparedArray4)) OR (`c`.`lft` <= `s`.`lft` AND `s`.`rgt` <= `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`1.07ms3.98KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT `m`.`tag_id`,`t`.* FROM `has_contentitem_tag_map` AS `m` INNER JOIN `has_tags` AS `t` ON `m`.`tag_id` = `t`.`id` WHERE `m`.`type_alias` = :contentType AND `m`.`content_item_id` = :id AND `t`.`published` = 1 AND `t`.`access` IN (:preparedArray1,:preparedArray2) AND `language` IN (:preparedArray3,:preparedArray4)929μs4.13KBParams/libraries/src/Helper/TagsHelper.php:388Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `has_categories` AS `s` INNER JOIN `has_categories` AS `c` ON (`s`.`lft` < `c`.`lft` AND `c`.`lft` < `s`.`rgt` AND `c`.`language` IN (:preparedArray3,:preparedArray4)) OR (`c`.`lft` <= `s`.`lft` AND `s`.`rgt` <= `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`298μs3.98KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT DISTINCT a.id, a.title, a.name, a.checked_out, a.checked_out_time, a.note, a.state, a.access, a.created_time, a.created_user_id, a.ordering, a.language, a.fieldparams, a.params, a.type, a.default_value, a.context, a.group_id, a.label, a.description, a.required, a.only_use_in_subform,l.title AS language_title, l.image AS language_image,uc.name AS editor,ag.title AS access_level,ua.name AS author_name,g.title AS group_title, g.access as group_access, g.state AS group_state, g.note as group_note FROM has_fields AS a LEFT JOIN `has_languages` AS l ON l.lang_code = a.language LEFT JOIN has_users AS uc ON uc.id=a.checked_out LEFT JOIN has_viewlevels AS ag ON ag.id = a.access LEFT JOIN has_users AS ua ON ua.id = a.created_user_id LEFT JOIN has_fields_groups AS g ON g.id = a.group_id LEFT JOIN `has_fields_categories` AS fc ON fc.field_id = a.id WHERE ( (`a`.`context` = :context AND (`fc`.`category_id` IS NULL OR `fc`.`category_id` IN (:preparedArray1,:preparedArray2,:preparedArray3)) AND `a`.`access` IN (:preparedArray4,:preparedArray5)) AND (`a`.`group_id` = 0 OR `g`.`access` IN (:preparedArray6,:preparedArray7)) AND `a`.`state` = :state) AND (`a`.`group_id` = 0 OR `g`.`state` = :gstate) AND `a`.`only_use_in_subform` = :only_use_in_subform AND `a`.`language` IN (:preparedArray8,:preparedArray9) ORDER BY a.ordering ASC365μs4.81KBParams/libraries/src/MVC/Model/BaseDatabaseModel.php:166Copy
  • SELECT `alias` FROM `has_content` WHERE `id` = :id108μs1.31KBParams/components/com_content/src/Service/Router.php:168Copy
  • SELECT `alias` FROM `has_content` WHERE `id` = :id2.09ms1.31KBParams/components/com_content/src/Service/Router.php:168Copy
  • SELECT `m`.`id`,`m`.`title`,`m`.`module`,`m`.`position`,`m`.`content`,`m`.`showtitle`,`m`.`params`,`mm`.`menuid` FROM `has_modules` AS `m` LEFT JOIN `has_modules_menu` AS `mm` ON `mm`.`moduleid` = `m`.`id` LEFT JOIN `has_extensions` AS `e` ON `e`.`element` = `m`.`module` AND `e`.`client_id` = `m`.`client_id` WHERE ( ( (`m`.`published` = 1 AND `e`.`enabled` = 1 AND `m`.`client_id` = :clientId AND `m`.`access` IN (:preparedArray1,:preparedArray2)) AND (`m`.`publish_up` IS NULL OR `m`.`publish_up` <= :publishUp)) AND (`m`.`publish_down` IS NULL OR `m`.`publish_down` >= :publishDown)) AND (`mm`.`menuid` = :itemId OR `mm`.`menuid` <= 0) AND `m`.`language` IN (:preparedArray3,:preparedArray4) ORDER BY `m`.`position`,`m`.`ordering`2.36ms98.72KBParams/libraries/src/Cache/Controller/CallbackController.php:51Copy
  • SELECT `a`.`id`,`a`.`title`,`a`.`catid`,`a`.`language`, CASE WHEN CHAR_LENGTH(`a`.`alias`) != 0 THEN CONCAT_WS(':', `a`.`id`, `a`.`alias`) ELSE a.id END AS `slug`, CASE WHEN CHAR_LENGTH(`cc`.`alias`) != 0 THEN CONCAT_WS(':', `cc`.`id`, `cc`.`alias`) ELSE cc.id END AS `catslug` FROM `has_content` AS `a` LEFT JOIN `has_categories` AS `cc` ON `cc`.`id` = `a`.`catid` WHERE `a`.`catid` = :catid AND `a`.`state` = :state AND `a`.`access` IN (:preparedArray1,:preparedArray2) AND (`publish_up` IS NULL OR `publish_up` <= :nowDate1) AND (`publish_down` IS NULL OR `publish_down` >= :nowDate2) AND `a`.`language` IN (:preparedArray3,:preparedArray4) ORDER BY CASE WHEN `a`.`publish_up` IS NULL THEN `a`.`created` ELSE `a`.`publish_up` END DESC752μs2.63KBParams/plugins/content/pagenavigation/src/Extension/PageNavigation.php:188Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `has_categories` AS `s` INNER JOIN `has_categories` AS `c` ON (`s`.`lft` < `c`.`lft` AND `c`.`lft` < `s`.`rgt` AND `c`.`language` IN (:preparedArray3,:preparedArray4)) OR (`c`.`lft` <= `s`.`lft` AND `s`.`rgt` <= `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`663μs3.98KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT custom_data FROM has_extensions WHERE element = 'yootheme' AND folder = 'system' LIMIT 13.99ms536B/templates/yootheme/packages/platform-joomla/src/Storage.php:30Copy
  • SELECT `language`,`id` FROM `has_menu` WHERE `home` = '1' AND `published` = 1 AND `client_id` = 01.99ms704B/libraries/src/Language/Multilanguage.php:123Copy
  • SELECT `alias` FROM `has_content` WHERE `id` = :id1.98ms1.31KBParams/components/com_content/src/Service/Router.php:168Copy
  • SELECT `alias` FROM `has_content` WHERE `id` = :id3.45ms1.31KBParams/components/com_content/src/Service/Router.php:168Copy
  • SELECT `c2`.`language`,CONCAT_WS(':', `c2`.`id`, `c2`.`alias`) AS `id`,CONCAT_WS(':', `ca`.`id`, `ca`.`alias`) AS `catid` FROM `has_content` AS `c` INNER JOIN `has_associations` AS `a` ON `a`.`id` = `c`.`id` AND `a`.`context` = :context INNER JOIN `has_associations` AS `a2` ON `a`.`key` = `a2`.`key` INNER JOIN `has_content` AS `c2` ON `a2`.`id` = `c2`.`id` INNER JOIN `has_categories` AS `ca` ON `c2`.`catid` = `ca`.`id` AND `ca`.`extension` = :extension2 WHERE `c`.`id` = :id AND c2.access IN (1,5) AND c2.language != 'nb-NO' AND (c2.publish_up IS NULL OR c2.publish_up <= '2025-05-03 08:05:33') AND (c2.publish_down IS NULL OR c2.publish_down >= '2025-05-03 08:05:33') AND c2.state = 14.67ms4.03KBParams/libraries/src/Language/Associations.php:145Copy
  • SELECT `c2`.`language`,`c2`.`id` FROM `has_menu` AS `c` INNER JOIN `has_associations` AS `a` ON `a`.`id` = `c`.`id` AND `a`.`context` = :context INNER JOIN `has_associations` AS `a2` ON `a`.`key` = `a2`.`key` INNER JOIN `has_menu` AS `c2` ON `a2`.`id` = `c2`.`id` WHERE `c`.`id` = :id162μs1.38KBParams/libraries/src/Language/Associations.php:145Copy
  • SELECT `name`,`element` FROM `has_extensions` WHERE `type` = 'plugin' AND `folder` = 'finder' AND `enabled` = 1157μs640B/administrator/components/com_finder/src/Helper/LanguageHelper.php:135Copy
  • SELECT `title` FROM `has_finder_taxonomy` WHERE `parent_id` = 1 AND `state` = 1 AND `access` IN (1,5)439μs584B/administrator/components/com_finder/src/Indexer/Taxonomy.php:314Copy
  • SELECT DISTINCT a.id, a.title, a.name, a.checked_out, a.checked_out_time, a.note, a.state, a.access, a.created_time, a.created_user_id, a.ordering, a.language, a.fieldparams, a.params, a.type, a.default_value, a.context, a.group_id, a.label, a.description, a.required, a.only_use_in_subform,l.title AS language_title, l.image AS language_image,uc.name AS editor,ag.title AS access_level,ua.name AS author_name,g.title AS group_title, g.access as group_access, g.state AS group_state, g.note as group_note FROM has_fields AS a LEFT JOIN `has_languages` AS l ON l.lang_code = a.language LEFT JOIN has_users AS uc ON uc.id=a.checked_out LEFT JOIN has_viewlevels AS ag ON ag.id = a.access LEFT JOIN has_users AS ua ON ua.id = a.created_user_id LEFT JOIN has_fields_groups AS g ON g.id = a.group_id WHERE ( (`a`.`context` = :context AND `a`.`access` IN (:preparedArray1,:preparedArray2)) AND (`a`.`group_id` = 0 OR `g`.`access` IN (:preparedArray3,:preparedArray4)) AND `a`.`state` = :state) AND (`a`.`group_id` = 0 OR `g`.`state` = :gstate) AND `a`.`only_use_in_subform` = :only_use_in_subform AND `a`.`language` IN (:preparedArray5,:preparedArray6) ORDER BY a.ordering ASC360μs4.75KBParams/libraries/src/MVC/Model/BaseDatabaseModel.php:166Copy
  • SELECT `title` FROM `has_finder_taxonomy` WHERE `parent_id` = 1 AND `state` = 1 AND `access` IN (1,5)162μs584B/administrator/components/com_finder/src/Indexer/Taxonomy.php:314Copy
  • SELECT SUM(CASE WHEN `a`.`next_execution` <= :now THEN 1 ELSE 0 END) AS due_count,SUM(CASE WHEN `a`.`locked` IS NULL THEN 0 ELSE 1 END) AS locked_count FROM `has_scheduler_tasks` AS `a` WHERE `a`.`state` = 11.42ms1.37KBParams/administrator/components/com_scheduler/src/Model/TasksModel.php:466Copy
  • SELECT `session_id` FROM `has_session` WHERE `session_id` = ?1.87ms1KBParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:291Copy
  • UPDATE `has_session` SET `data` = ? , `time` = ? WHERE `session_id` = ?1.37ms592BParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:318Copy