{"id":5635,"date":"2021-12-31T09:00:14","date_gmt":"2021-12-31T08:00:14","guid":{"rendered":"https:\/\/adntro.com\/?p=5635"},"modified":"2025-08-04T11:56:16","modified_gmt":"2025-08-04T09:56:16","slug":"metabolismo-vitamina-d","status":"publish","type":"post","link":"https:\/\/adntro.com\/en\/blog\/nutrigenetics\/vitamin-d-metabolism\/","title":{"rendered":"The metabolism of vitamin D"},"content":{"rendered":"<p class=\" translation-block\">You should probably heard that vitamin D is the vitamin of the sun. Well, this is a half-truth. When we talk about vitamin D, we talk about a team work between diet, our organism and the sun light.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"287\" height=\"176\" src=\"https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/vitaminaD.jpg\" alt=\"The metabolism of vitamin D\" class=\"wp-image-5637\" srcset=\"https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/vitaminaD.jpg 287w, https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/vitaminaD-18x12.jpg 18w\" sizes=\"(max-width: 287px) 100vw, 287px\" \/><\/figure>\n<\/div>\n\n\n<p><strong><strong> First of all, we should know that there are several forms of vitamin D:<\/strong><\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Provitamin D2<\/strong> or ergosterol activated into <strong>vitamin D2<\/strong> or ergocalciferol <strong>(vegetal source<\/strong>).<\/li>\n\n\n\n<li><strong>Provitamin D3<\/strong> or 7-dehydrocholesterol that is activated to <strong>vitamin D3<\/strong> or cholecalciferol <strong>(animal source<\/strong>This process occurs in the skin and it is the major source of vitamin D in human beings providing us around 90% of the vitamin D that we need.<\/li>\n<\/ol>\n\n\n\n<p class=\" translation-block\">Both <strong>provitamins are activated thanks to the sunlight<\/strong> evolving to previtamins and therefore, thanks to their atoms distribution (isomerization), to vitamins. Once this process has taken place, vitamins are released and carried by bloodstream and finally be turned into circulating hormone by the kidney.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"789\" height=\"453\" src=\"https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/vitaminaD2.png\" alt=\"\" class=\"wp-image-5638\" style=\"width:628px;height:361px\" srcset=\"https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/vitaminaD2.png 789w, https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/vitaminaD2-300x172.png 300w, https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/vitaminaD2-768x441.png 768w, https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/vitaminaD2-18x10.png 18w\" sizes=\"(max-width: 789px) 100vw, 789px\" \/><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>VITAMIN D CUTANEOUS SYNTHESIS<\/strong><\/h2>\n\n\n\n<p>As cutaneous synthesis provides us most of our vitamin D needs, we will take a detailed look into this process.<\/p>\n\n\n\n<p>Provitamin D3 (7-dehydrocholesterol) is a molecule that contains a double bond ring (marked in orange in the illustration below). Wavelengths between 290 and 315 nm the double bond ring opens after absorbing photons generating provitamin D3 (precholecalciferol), a highly unstable molecule. Finally, thanks to the heat, its atoms are redistributed (a process known as thermal isomerization) generating vitamin D3 (cholecalciferol). This molecule generates 25-hydroxyvitamin D (used for blood vitamin D level quantification) and it is transported through the bloodstream to adipose tissue storage or kidney final activation (1\u03b1,25-dihydroxyvitamin D)&nbsp;<\/p>\n\n\n\n<p>This molecule becomes <strong>25-hydroxyvitamin D<\/strong>, <strong>first biologically active metabolite<\/strong> produced in the liver and used to quantify vitamin D levels in the blood. It is then transported through the bloodstream to adipose tissue for storage or to the kidney for final activation (1\u03b1, 25-dihydroxyvitamin D).<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"641\" height=\"195\" src=\"https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/adntro-vitaminad.png\" alt=\"\" class=\"wp-image-5640\" srcset=\"https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/adntro-vitaminad.png 641w, https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/adntro-vitaminad-300x91.png 300w, https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/adntro-vitaminad-18x5.png 18w\" sizes=\"(max-width: 641px) 100vw, 641px\" \/><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>CUTANEOUS SYNTHESIS INFLUENTIAL FACTORS<\/strong><\/h2>\n\n\n\n<p>It is estimated that 5-15 minutes\/day sun exposure on the face and arms during spring, summer and autumn is able to maintain the vitamin D storage at adequate levels. <strong>But, which factors influence a higher or lower ratio of obtaining vitamin D in our body? <\/strong>Ambiental, phenotypic and genetic factors.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>AMBIENTAL FACTORS<\/strong><\/h3>\n\n\n\n<p><strong>Sunlight intensity:<\/strong>it varies depending on the season of the year, latitude and time of day. During winter, the early morning and late afternoon, solar rays enter the Earth at an oblique angle. When this happens, more photons are absorbed by the ozone layer and less are absorbed by our skin, necessary for cutaneous synthesis of vitamin D.<\/p>\n\n\n\n<p><strong>Sun protection cream:<\/strong>sun creams absorb solar radiation before they penetrate the skin, the greater the protection of the sunscreen, the lower the vitamin D cutaneous synthesis, but the higher our skin protection.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"342\" height=\"181\" src=\"https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/mundo-adntro.jpg\" alt=\"\" class=\"wp-image-5639\" srcset=\"https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/mundo-adntro.jpg 342w, https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/mundo-adntro-300x159.jpg 300w, https:\/\/adntro.com\/wp-content\/uploads\/2021\/12\/mundo-adntro-18x10.jpg 18w\" sizes=\"(max-width: 342px) 100vw, 342px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>PHENOTYPIC FACTORS<\/strong><\/h3>\n\n\n\n<p><strong>Age:<\/strong>people above 70 years produce 25% of the amount of vitamin D synthesis by a 20-year-old by being exposed to the same amount of sunlight.<\/p>\n\n\n\n<p><strong>Quantity of melanin<\/strong>: People with higher amounts of melanin need longer sun exposure to synthesize the same amount of vitamin D (cholecalciferol) as a person with less melanin. This difference is due to the ability of melanin to absorb photons. The more melanin, the less is the absorption.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>GENETIC FACTORS<\/strong><\/h3>\n\n\n\n<p>As we have seen, the synthesis of vitamin D requires a <strong>complex<\/strong> <a href=\"https:\/\/adntro.com\/en\/blog\/nutrigenetics\/types-of-metabolism\/\"><strong>metabolism<\/strong><\/a><strong> There are<\/strong>numerous chemical reactions for <strong>activation of vitamin D<\/strong> (25-hydroxyvitamin D) <strong>and <\/strong>the<strong> transportation.<\/strong> For that reason, genetics influence the metabolism of vitamin D and therefore the ratio of vitamin D conversion. <strong>Are you interested in knowing <a href=\"https:\/\/adntro.com\/en\/dna-kit\/nutritional-dna-test\/\"> your genetic variants associated with the activation of vitamin D and its transportation?<\/a><\/strong> Find out with the <a href=\"https:\/\/adntro.com\/en\/\">DNA TEST<\/a> of ADNTRO or by <a href=\"https:\/\/adntro.com\/en\/upload-your-raw-adn-landing\/\">upload your RAW DNA data<\/a>.<\/p>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>","protected":false},"excerpt":{"rendered":"<p>It is very likely that you have heard that vitamin D is the sunshine vitamin. From ADNTRO we want to reveal to you that it is a half-truth. It is a teamwork between our diet, our body and sunlight. First of all, we must know that there are different forms of vitamin D: Both of them are [...]<\/p>","protected":false},"author":8,"featured_media":5642,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41],"tags":[251,42,18,211,253,252,255,20,254,93,250],"class_list":["post-5635","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutrigenetica","tag-activacion","tag-adntro","tag-genetica","tag-metabolismo","tag-previtamina","tag-provitamina","tag-sintesis-cutanea","tag-snp","tag-sol","tag-variantes-geneticas","tag-vitamina-d"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Descubre el metabolismo de la vitamina D | ADNTRO<\/title>\n<meta name=\"description\" content=\"\u00bfConoces las formas de la vitamina D? Te descubrimos la provitamina D2 y D3 y factores que influyen en la s\u00edntesis cut\u00e1nea de la vitamina D.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/adntro.com\/en\/blog\/nutrigenetics\/vitamin-d-metabolism\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Descubre el metabolismo de la vitamina D | ADNTRO\" \/>\n<meta property=\"og:description\" content=\"\u00bfConoces las formas de la vitamina D? 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Biotecn\u00f3loga por la Universidad Francisco de Vitoria, donde recibi\u00f3 dos becas de expediente acad\u00e9mico brillante. Estuvo trabajando en un proyecto de investigaci\u00f3n sobre la asimetr\u00eda izquierda-derecha en Newcastle, siendo premiada en la Conferencia del Centro de Investigaci\u00f3n Cardiovascular Trainees Meeting como el mejor p\u00f3ster (2018). Complet\u00f3 un m\u00e1ster en Biolog\u00eda Computacional en la Universidad Polit\u00e9cnica de Madrid. All\u00ed estudi\u00f3 las redes de interacci\u00f3n metab\u00f3lica en el microbioma de pacientes con Enfermedad de Chron y Colitis Ulcerosa en el centro de investigaci\u00f3n CBGP, centro de Excelencia Severo Ochoa (2020). 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Biotecn\u00f3loga por la Universidad Francisco de Vitoria, donde recibi\u00f3 dos becas de expediente acad\u00e9mico brillante. Estuvo trabajando en un proyecto de investigaci\u00f3n sobre la asimetr\u00eda izquierda-derecha en Newcastle, siendo premiada en la Conferencia del Centro de Investigaci\u00f3n Cardiovascular Trainees Meeting como el mejor p\u00f3ster (2018). Complet\u00f3 un m\u00e1ster en Biolog\u00eda Computacional en la Universidad Polit\u00e9cnica de Madrid. All\u00ed estudi\u00f3 las redes de interacci\u00f3n metab\u00f3lica en el microbioma de pacientes con Enfermedad de Chron y Colitis Ulcerosa en el centro de investigaci\u00f3n CBGP, centro de Excelencia Severo Ochoa (2020). 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