Vitamin A

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Vitamin A is essential for your health. It supports cell growth, immune function, fetal development, and vision. Perhaps one of the best-known functions of vitamin A is its role in vision and eye...
Vitamin A is a fat-soluble vitamin and an essential nutrient for humans. It is a group of organic compounds that includes retinol, retinal (also known as retinaldehyde), retinoic acid, and several provitamin A carotenoids (most notably beta-carotene [?-carotene]). Vitamin A has multiple functions: it is essential for embryo development and growth, for maintenance of the immune system, and for ...
La vitamina A (vit A) è una vitamina liposolubile – che si diluisce in acidi grassi – di origine sia vegetale che animale, largamente presente negli alimenti, dotata di numerose funzioni biologiche e raramente carente nella dieta; l'eccesso può essere nocivo ed avere complicanze anche gravi, soprattutto per il feto della donna incinta. Shutterstock
La vitamina A è inoltre utile per lo sviluppo delle ossa e per il loro rafforzamento nel tempo, per la crescita dei denti e si distingue per la sua capacità di fornire una risposta immunitaria al nostro organismo. Recenti scoperte scientifiche hanno dimostrato che la vitamina A ha anche capacità antitumorali.
Vitamin A ist für alle Wirbeltiere essentiell und für den Sehvorgang, die Fortpflanzung und Embryonalentwicklung, die Zell- und Gewebedifferenzierung und Immunfunktionen von Bedeutung. Inhaltsverzeichnis 1 Geschichte 2 Vorkommen 3 Synthetische Herstellung 4 Physiologie 4.1 Umwandlung der Carotine 5 Funktion 5.1 Sehvorgang 5.2 Nervensystem
La vitamina A è una vitamina liposolubile, in natura si trova in diverse forme. Con il termine di vitamina A vengono indicati sia il retinolo sia i suoi analoghi, detti retinoidi, di cui si conoscono almeno 1500 tipi diversi, tra naturali e sintetici.
Vitamin A gehört so wie die Vitamine D, E und K zu den fettlöslichen Vitaminen. Es ist in tierischen Lebensmitteln enthalten und in pflanzlichen Lebensmitteln in Form der Vorstufe Beta-Carotin. Vitamin A ist unter anderem wichtig für Augen und Haut sowie für die Knochen und Zähne.
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Vitamin A is needed for the proper growth and functioning of many parts of the body, including the eyes, skin, and immune system. It can be found in many foods, including fruits, vegetables, and...
The equivalents of 1 IU for selected vitamins are: Vitamin A: 1 IU is the biological equivalent of 0.3 mcg retinol, or of 0.6 mcg beta-carotene Vitamin D: 1 IU is the biological equivalent of 0.025 mcg cholecalciferol or ergocalciferol Vitamin E: 1 IU is the biological equivalent of 0.67 mg d-alpha-tocopherol, or 0.9 mg of dl-alpha-tocopherol
Vitamin A is involved in immune function, cellular communication, growth and development, and male and female reproduction [ 1-3 ]. Vitamin A supports cell growth and differentiation, playing a critical role in the normal formation and maintenance of the heart, lungs, eyes, and other organs [ 1, 2 ].
Descrizione. Per convenzione, il termine vitamina non comprende altri nutrienti essenziali, come i sali minerali, gli acidi grassi essenziali o gli amminoacidi essenziali (che sono necessari in quantità maggiori delle vitamine), né il gran numero di ulteriori nutrienti necessari per la salute dell'organismo. Attualmente tredici vitamine sono universalmente riconosciute.
Vitamin A (retinol, retinoic acid) is a nutrient important to vision, growth, cell division, reproduction and immunity. Vitamin A also has antioxidant properties.
Vitamin A also stimulates the production and activity of white blood cells, takes part in remodeling bone, helps maintain healthy endothelial cells (those lining the body’s interior surfaces), and regulates cell growth and division such as needed for reproduction.
Vitamin A plays an important role in many body systems, including: Eye H ealth Vitamin A is so important to your eyes that it is also known as “retinol,” after the word “retina.” Sufficient Vitamin...
Vitamin A helps to keep your body healthy. It maintains your immune system and protects important structures in the eye: the cornea, conjunctiva, photoreceptor rod and cone cells in the retina. This is why you may have heard that vitamin A is important for eye health.
Vitamin A plays a key role in many systems of your body. Vitamin A is essential for healthy vision, metabolism and cell development. It’s an important factor in keeping your immune system and reproductive system healthy. Your body can’t make vitamin A on its own, so you must get it through the foods you eat. Vitamin A is vital for your vision.
La vitamina E è liposolubile, quindi gli integratori alimentari che la contengono sono generalmente sotto forma di capsula softgel contenente vitamina esterificata con acido acetico, per generare tocoferil acetato, diluito in olio vegetale. Per l'alfa-tocoferolo, le quantità vanno da 100 a 1000 UI per porzione.
The carotenoid ‘beta-carotene’ is most efficiently converted into retinol, making it an important form of vitamin A. Sufficient intake of this nutrient may help support better vision (especially night vision), growth and development, immune function and may also be beneficial for reproductive health. Quali®-A with FlexiLease™
Deficiency of vitamin A is associated with significant morbidity and mortality from common childhood infections, and is the world’s leading preventable cause of childhood blindness. Vitamin A deficiency also contributes to maternal mortality and other poor outcomes of pregnancy and lactation. It also diminishes the ability to fight infections.
20 Foods High in Vitamin A. Vitamin A1, also known as retinol, is only found in animal-sourced foods, such as oily fish, liver, cheese and butter. 1. Beef Liver — 713% DV per serving. 2. Lamb ...
Vitamin A is a fat-soluble vitamin that is absorbed with fats in your diet and stored in your body's fatty tissue. Vitamin A is used to treat vitamin A deficiency. Vitamin A is possibly effective in preventing cataracts, or slowing the progression of retinitis pigmentosa (an eye disease that causes damage to the retina).
Good sources of vitamin A (retinol) include: cheese. eggs. oily fish. fortified low-fat spreads. milk and yoghurt. liver and liver products such as liver pâté – this is a particularly rich source of vitamin A, so you may be at risk of having too much vitamin A if you have it more than once a week (if you're pregnant you should avoid eating ...
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