Deprecated: Constant FILTER_SANITIZE_STRING is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/conditionals/third-party/elementor-edit-conditional.php on line 22

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Deprecated: Creation of dynamic property Google\Site_Kit\Modules\Analytics\AMP_Tag::$module_slug is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/google-site-kit/includes/Core/Modules/Tags/Module_Tag.php on line 42

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Deprecated: Creation of dynamic property AMPforWP\AMPVendor\AMP_Post_Template::$ID is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/accelerated-mobile-pages/includes/vendor/amp/includes/class-amp-post-template.php on line 70

Deprecated: Creation of dynamic property AMPforWP\AMPVendor\AMP_Post_Template::$post is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/accelerated-mobile-pages/includes/vendor/amp/includes/class-amp-post-template.php on line 71

Deprecated: Creation of dynamic property ILJ\Core\LinkBuilder::$multi_keyword_mode is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/internal-links/core/linkbuilder.php on line 60

Deprecated: Creation of dynamic property ILJ\Core\LinkBuilder::$links_per_page is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/internal-links/core/linkbuilder.php on line 61

Deprecated: Creation of dynamic property ILJ\Core\LinkBuilder::$links_per_target is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/internal-links/core/linkbuilder.php on line 62

Deprecated: The PSR-0 `Requests_...` class names in the Requests library are deprecated. Switch to the PSR-4 `WpOrg\Requests\...` class names at your earliest convenience. in /home4/muckboots/nutrisalute.it/wp-includes/class-requests.php on line 21

Deprecated: Return type of Yoast\WP\Lib\Model::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/lib/model.php on line 560

Deprecated: Return type of Yoast\WP\Lib\ORM::offsetExists($key) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/lib/orm.php on line 2457

Deprecated: Return type of Yoast\WP\Lib\ORM::offsetGet($key) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/lib/orm.php on line 2468

Deprecated: Return type of Yoast\WP\Lib\ORM::offsetSet($key, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/lib/orm.php on line 2478

Deprecated: Return type of Yoast\WP\Lib\ORM::offsetUnset($key) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/lib/orm.php on line 2490

Deprecated: Creation of dynamic property Yoast\WP\SEO\Surfaces\Classes_Surface::$container is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/surfaces/classes-surface.php on line 20

Deprecated: Creation of dynamic property Yoast\WP\SEO\Main::$classes is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/lib/abstract-main.php on line 65

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT * FROM `yoast_wp_seo_models_indexable` WHERE `object_id` = '2033' AND `object_type` = 'post' LIMIT 1

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT * FROM `yoast_wp_seo_models_indexable` WHERE `object_id` = '2033' AND `object_type` = 'post' LIMIT 1


Deprecated: explode(): Passing null to parameter #2 ($string) of type string is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/builders/indexable-post-builder.php on line 125

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable_hierarchy' doesn't exist]
DELETE FROM `yoast_wp_seo_models_indexable_hierarchy` WHERE `indexable_id` = NULL

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT * FROM `yoast_wp_seo_models_indexable` WHERE `object_id` = '2001' AND `object_type` = 'post' LIMIT 1

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT * FROM `yoast_wp_seo_models_indexable` WHERE `object_id` = '2001' AND `object_type` = 'post' LIMIT 1


Deprecated: explode(): Passing null to parameter #2 ($string) of type string is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/builders/indexable-post-builder.php on line 125

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT * FROM `yoast_wp_seo_models_indexable` WHERE `object_id` = '2' AND `object_type` = 'user' LIMIT 1

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT * FROM `yoast_wp_seo_models_indexable` WHERE `object_id` = '2' AND `object_type` = 'user' LIMIT 1

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT `id` FROM `yoast_wp_seo_models_indexable` WHERE `object_type` = 'post' AND `object_sub_type` IN ('post') AND `author_id` = '2' AND `is_public` = '1' LIMIT 1

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT `id` FROM `yoast_wp_seo_models_indexable` WHERE `object_type` = 'post' AND `object_sub_type` IN ('post') AND `author_id` = '2' AND `is_public` = '1' LIMIT 1

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT `id` FROM `yoast_wp_seo_models_indexable` WHERE `object_type` = 'post' AND `object_sub_type` IN ('post') AND `author_id` = '2' AND `is_public` IS NULL LIMIT 1

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT `id` FROM `yoast_wp_seo_models_indexable` WHERE `object_type` = 'post' AND `object_sub_type` IN ('post') AND `author_id` = '2' AND `is_public` IS NULL LIMIT 1


Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/models/indexable.php on line 170

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
INSERT INTO `yoast_wp_seo_models_indexable` (`object_type`, `object_id`, `permalink`, `title`, `description`, `is_cornerstone`, `is_robots_noindex`, `is_robots_nofollow`, `is_robots_noarchive`, `is_robots_noimageindex`, `is_robots_nosnippet`, `is_public`, `has_public_posts`, `blog_id`, `open_graph_image`, `open_graph_image_id`, `open_graph_image_source`, `open_graph_image_meta`, `twitter_image`, `twitter_image_id`, `twitter_image_source`, `object_published_at`, `object_last_modified`, `version`, `permalink_hash`, `created_at`, `updated_at`) VALUES ('user', '2', 'https://nutrisalute.it/author/luca-prispola/', NULL, NULL, '0', '0', NULL, NULL, NULL, NULL, NULL, '0', '1', 'https://secure.gravatar.com/avatar/a6d030af8bd128739ac45cbe5309a916?s=500&d=mm&r=g', NULL, 'gravatar-image', NULL, 'https://secure.gravatar.com/avatar/a6d030af8bd128739ac45cbe5309a916?s=500&d=mm&r=g', NULL, 'gravatar-image', '2019-07-31 10:32:00', '2021-10-07 14:45:27', '2', '44:5e003b4d4c50f692cea2e88159c881e6', '2024-05-04 02:42:37', '2024-05-04 02:42:37')


Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/models/indexable.php on line 170

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SHOW FULL COLUMNS FROM `yoast_wp_seo_models_indexable`

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT * FROM `yoast_wp_seo_models_indexable` WHERE `object_id` = '2' AND `object_type` = 'user' LIMIT 1

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SELECT * FROM `yoast_wp_seo_models_indexable` WHERE `object_id` = '2' AND `object_type` = 'user' LIMIT 1


Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/models/indexable.php on line 170

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
INSERT INTO `yoast_wp_seo_models_indexable` (`object_type`, `object_id`, `permalink`, `title`, `description`, `is_cornerstone`, `is_robots_noindex`, `is_robots_nofollow`, `is_robots_noarchive`, `is_robots_noimageindex`, `is_robots_nosnippet`, `is_public`, `has_public_posts`, `blog_id`, `open_graph_image`, `open_graph_image_id`, `open_graph_image_source`, `open_graph_image_meta`, `twitter_image`, `twitter_image_id`, `twitter_image_source`, `object_published_at`, `object_last_modified`, `version`, `permalink_hash`, `created_at`, `updated_at`) VALUES ('user', '2', 'https://nutrisalute.it/author/luca-prispola/', NULL, NULL, '0', '0', NULL, NULL, NULL, NULL, NULL, '0', '1', 'https://secure.gravatar.com/avatar/a6d030af8bd128739ac45cbe5309a916?s=500&d=mm&r=g', NULL, 'gravatar-image', NULL, 'https://secure.gravatar.com/avatar/a6d030af8bd128739ac45cbe5309a916?s=500&d=mm&r=g', NULL, 'gravatar-image', '2019-07-31 10:32:00', '2021-10-07 14:45:27', '2', '44:5e003b4d4c50f692cea2e88159c881e6', '2024-05-04 02:42:37', '2024-05-04 02:42:37')


Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/models/indexable.php on line 170

Errore sul database di WordPress: [Table 'muckboot_wrdp4.yoast_wp_seo_models_indexable' doesn't exist]
SHOW FULL COLUMNS FROM `yoast_wp_seo_models_indexable`


Deprecated: Creation of dynamic property Yoast\WP\SEO\Context\Meta_Tags_Context::$page_type is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 43

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$title is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$source is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64
Vitamina A: benefici e proprietà - Nutrisalute
Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$meta_description is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$robots is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$canonical is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$rel_prev is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$rel_next is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$open_graph_locale is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$open_graph_type is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$open_graph_title is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$open_graph_description is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$open_graph_url is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Context\Meta_Tags_Context::$wordpress_site_name is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$open_graph_site_name is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Context\Meta_Tags_Context::$company_name is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Context\Meta_Tags_Context::$company_logo_id is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Context\Meta_Tags_Context::$site_represents is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Context\Meta_Tags_Context::$open_graph_publisher is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$open_graph_article_publisher is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$open_graph_article_author is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$open_graph_article_published_time is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$open_graph_article_modified_time is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Context\Meta_Tags_Context::$open_graph_enabled is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$open_graph_images is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Context\Meta_Tags_Context::$twitter_card is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$twitter_card is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$twitter_title is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$twitter_description is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$twitter_image is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$twitter_creator is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$twitter_site is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Deprecated: Creation of dynamic property Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation::$estimated_reading_time_minutes is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php on line 64

Vitamina A: benefici e proprietà

La vitamina A è essenziale per la crescita e lo sviluppo, il riconoscimento cellulare, la vista, il lavoro immunitario e la riproduzione.


Deprecated: Creation of dynamic property AAWP_Template_Handler::$items_max is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/aawp/includes/class.aawp-functions.php on line 74

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Deprecated: Creation of dynamic property AAWP_Template_Handler::$title_adding is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/aawp/includes/class.aawp-functions.php on line 81

Deprecated: Creation of dynamic property AAWP_Template_Handler::$image_link_title_adding is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/aawp/includes/class.aawp-functions.php on line 82

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Deprecated: Creation of dynamic property AAWP_Template_Handler::$pricing_advertised_price_hide_unavailability is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/aawp/includes/class.aawp-functions.php on line 92

Deprecated: Creation of dynamic property AAWP_Template_Handler::$pricing_reduction is deprecated in /home4/muckboots/nutrisalute.it/wp-content/plugins/aawp/includes/class.aawp-functions.php on line 93

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OffertaBestseller No. 1
Vitamina A pura, 360 microcompresse ad alto dosaggio | 1200mcg per compressa di Vitamina A, 4000ui...
  • 💊 FORMULA “ONE A DAY”: 1 compressa al giorno apporta 1200 mcg di Vitamina A (massimo consentito dalla normativa Italiana). I dosaggi di Vitamina A 8000u.i. e addirittura di...

È un potente antiossidante e agisce nel corpo come un ormone, influenzando l’espressione dei geni e, di conseguenza, il fenotipo.

Aiuta cuore, polmoni, reni e altri organi a funzionare in modo corretto.

Come funziona la vitamina A

La vitamina A si trova in due forme:

  • vitamina A preformata (retinolo)

Si presenta in carne, pesce e prodotti lattiero-caseari.

  • pro-vitamina A

Si trova in frutta, verdura e altri prodotti a base vegetale.

C’è anche il beta-carotene, un precursore della vitamina A che si trova nelle piante. Si tratta di una ‘pro-vitamina’ che di per sé è un antiossidante ma che viene convertita in vitamina A secondo le necessità del corpo, quindi nessun rischio di sovradosaggio o tossicità.

Alimenti ricchi di vitamina A

Come appena accennato, esistono due tipi di vitamina A. La vitamina A preformata, retinolo, si trova nei prodotti animali. Buone fonti sono:

  • latte fortificato
  • uova
  • carne
  • formaggio
  • fegato
  • olio di pesce
  • panna.

La pro-vitamina A si trova in alimenti a base vegetale come frutta e verdura. Il tipo più comune è il beta-carotene, un carotenoide che produce pigmenti scuri negli alimenti vegetali. Si trova nei cibi dai colori vivaci, per esempio:

  • albicocche
  • broccoli
  • carote
  • patate dolci
  • pompelmo rosa
  • verdure a foglia verde
  • zucca.

Vitamina A benefici: perché fa bene

Ecco i più importanti benefici della vitamina A.

Protegge gli occhi dalla cecità notturna e dal declino legato all’invecchiamento

La vitamina A è essenziale per la preservazione della vista. Converte la luce che colpisce l’occhio in un segnale elettrico che può essere inviato al cervello.

La cecità notturna si verifica nelle persone con carenza di vitamina A, poiché questa è un componente importante della rodopsina del pigmento. La rodopsina si trova nella retina ed è estremamente sensibile alla luce.

Chi è affetto da tale condizione è in grado di vedere normalmente durante il giorno, ma ha una visione ridotta al buio in quanto gli occhi lottano per raccogliere la luce ai livelli più bassi.

Oltre a prevenire la cecità notturna, assumere adeguate quantità di vitamina A può aiutare a rallentare il declino della vista che alcune persone sperimentano con l’avanzare dell’età.

La degenerazione maculare legata all’invecchiamento è la principale causa di cecità nei Paesi sviluppati. Sebbene la causa esatta non sia nota, si ritiene che sia il risultato di un danno cellulare alla retina, attribuite allo stress ossidativo.

Supporta un sistema immunitario sano

La vitamina A svolge un ruolo vitale nel mantenimento delle difese naturali del corpo. Ciò include le barriere mucose negli occhi, polmoni, intestino e organi genitali, le quali aiutano a intrappolare batteri e altri agenti infettivi.

È coinvolta nella produzione e nel lavoro dei globuli bianchi che contribuiscono a catturare ed eliminare batteri e agenti patogeni dal flusso sanguigno. Questo significa che una carenza vitaminica di tipo A può aumentare la sensibilità alle infezioni e ritardare la guarigione in caso di malattia.

Previene l’acne

L’acne è una condizione infiammatoria cronica della pelle che si sviluppa di solito sul viso, sulla schiena e sul petto.

Si verifica quando le ghiandole sebacee si intasano con pelle morta e oli. Queste ghiandole si trovano nei follicoli piliferi sulla pelle e producono sebo, una sostanza oleosa e cerosa che mantiene la pelle lubrificata e impermeabile.

Fisicamente l’acne non comporta alcun problema, ma può avere un forte effetto psicologicamente che sfocia in bassa autostima, ansia e depressione.

L’esatto ruolo che la vitamina A svolge nel trattamento dell’acne rimane poco chiaro, ma si può notare che una carenza di vitamina A può aumentare il rischio di svilupparlo, poiché provoca una sovrapproduzione della cheratina nei follicoli piliferi, rendendo più difficoltosa la rimozione delle cellule morte.

Supporta la salute delle ossa

I nutrienti essenziali per mantenere le ossa sane con l’età sono calcio, proteine e vitamina D. Tuttavia, assumere vitamina A è necessario per una corretta crescita e sviluppo osseo. Una carenza di questa vitamina è stata correlata alla cattiva salute delle ossa.

Infatti, le persone con bassi livelli ematici di vitamina A hanno un rischio più elevato di fratture ossee rispetto alle persone con livelli normali.

Da tenere comunque presente che lo stato della vitamina A da solo non determina il rischio di fratture. Anche la disponibilità di altri nutrienti chiave, come la vitamina D, svolge un ruolo molto importante.

Promuove un sano sviluppo e aiuta la riproduzione

La vitamina A è fondamentale per un sano sistema riproduttivo sia negli uomini che nelle donne, oltre a essere importante per garantire un normale sviluppo degli embrioni durante la gravidanza.

Nella riproduzione maschile una carenza blocca lo sviluppo delle cellule spermatiche causando infertilità. Allo stesso modo, nelle donne può influire sulla riproduzione riducendo la qualità dell’ovulo e influenzando l’impianto dello stesso nell’utero.

Nelle donne in gravidanza la vitamina A è coinvolta nella crescita e nello sviluppo di molti organi e strutture principali del feto: scheletro, sistema nervoso, cuore, reni, occhi, polmoni e pancreas. Ma in questo caso attenzione al sovradosaggio. Troppa vitamina A può essere dannosa per il bambino.

Dosi raccomandate


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OffertaBestseller No. 1
Vitamina A pura, 360 microcompresse ad alto dosaggio | 1200mcg per compressa di Vitamina A, 4000ui...
  • 💊 FORMULA “ONE A DAY”: 1 compressa al giorno apporta 1200 mcg di Vitamina A (massimo consentito dalla normativa Italiana). I dosaggi di Vitamina A 8000u.i. e addirittura di...

Il dosaggio di vitamina A è complicato. Troppo poco può rendere suscettibili alle malattie e ai problemi della vista, mentre troppo può creare altrettanti problemi.

L’assunzione raccomandata dipende dall’età, dal sesso e dallo stato riproduttivo.

Per le donne adulte è di 700 microgrammi, per gli uomini è di 900 microgrammi.

Problematiche

Parliamo di una vitamina liposolubile, un consumo eccessivo può portare a tossicità. L’ipervitaminosi A è causata dal consumo di troppa vitamina A preformata attraverso la dieta o integratori.

I sintomi possono includere: nausea, vertigini, mal di testa, dolore e persino la morte.

Assumere molta pro-vitamina A nella sua forma vegetale non comporta gli stessi rischi, la sua conversione nella forma attiva nel corpo viene regolata da sola.

Carenza vitamina A: i sintomi

La carenza di vitamina A è rara ma non impossibile. Le condizioni che interferiscono con la normale digestione possono portare a malassorbimento della vitamina come celiachia, morbo di Crohn, cirrosi, alcolismo e fibrosi cistica. A rischio ci sono anche adulti e bambini che seguono una dieta molto limitata a causa della povertà o dell’autolimitazione.

Una lieve carenza di vitamina A può causare affaticamento, sensibilità alle infezioni e infertilità. I sintomi di una carenza più grave sono:

  • xeroftalmia (grave secchezza dell’occhio, se non trattata porta a cecità)
  • cecità notturna
  • macchie irregolari sugli occhi
  • pelle e capelli secchi.

Per concludere, la vitamina A è vitale per molti importanti processi nel corpo. È utilizzata per mantenere una vista sana, per garantire il normale funzionamento degli organi e del sistema immunitario, per una crescita sana e uno sviluppo normale del feto nell’utero.

Sia troppo poca che troppa vitamina A possono avere effetti negativi sulla salute.

Il modo migliore per assicurare di ottenere il corretto apporto vitaminico è consumare alimenti ricchi di vitamina A come parte della dieta quotidiana ed evitare di assumerne quantità eccessive.


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