{"id":11341,"date":"2025-10-07T10:11:43","date_gmt":"2025-10-07T07:11:43","guid":{"rendered":"https:\/\/www.aktifinternational.com\/en\/?p=11341"},"modified":"2025-10-07T10:11:43","modified_gmt":"2025-10-07T07:11:43","slug":"what-is-vitamin-d-found-in","status":"publish","type":"post","link":"https:\/\/www.aktifinternational.com\/en\/what-is-vitamin-d-found-in\/","title":{"rendered":"What is Vitamin D Found In?"},"content":{"rendered":"<p>Estimated reading time: 6 minutes 5 seconds<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.aktifinternational.com\/en\/what-is-vitamin-d-found-in\/#What_is_Vitamin_D_and_Why_is_it_Important_for_the_Body\" >What is Vitamin D and Why is it Important for the Body?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.aktifinternational.com\/en\/what-is-vitamin-d-found-in\/#What_is_Vitamin_D_Found_In\" >What is Vitamin D Found In?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.aktifinternational.com\/en\/what-is-vitamin-d-found-in\/#How_Much_Vitamin_D_Do_I_Need_Daily\" >How Much Vitamin D Do I Need Daily?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.aktifinternational.com\/en\/what-is-vitamin-d-found-in\/#What_are_the_Causes_of_Vitamin_D_Deficiency\" >What are the Causes of Vitamin D Deficiency?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.aktifinternational.com\/en\/what-is-vitamin-d-found-in\/#What_are_the_Symptoms_of_Vitamin_D_Deficiency\" >What are the Symptoms of Vitamin D Deficiency?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.aktifinternational.com\/en\/what-is-vitamin-d-found-in\/#Does_Vitamin_D_Supplementation_Improve_Immune_Function\" >Does Vitamin D Supplementation Improve Immune Function?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.aktifinternational.com\/en\/what-is-vitamin-d-found-in\/#How_to_Use_Vitamin_D_Supplements\" >How to Use Vitamin D Supplements?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_Vitamin_D_and_Why_is_it_Important_for_the_Body\"><\/span>What is Vitamin D and Why is it Important for the Body?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vitamin D, which we can obtain by synthesizing sunlight in our bodies or through some foods, is an important vitamin that plays a role in many areas, such as bone health, strengthening the immune system, improving general health, and regulating calcium and phosphorus levels.<\/p>\n<p>Some recent studies have shown that Vitamin D deficiency is also linked to conditions such as osteoporosis, cardiovascular diseases, and weakened immunity. Since vitamin D is a vitamin that the body obtains from the sun, people who work indoors during the day or people living in areas with limited sunlight are more likely to have vitamin D deficiency.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_is_Vitamin_D_Found_In\"><\/span>What is Vitamin D Found In?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vitamin D can be obtained from three main sources: sunlight, various foods, and vitamin supplements. But very few foods contain significant amounts of vitamin D. For this reason, many people turn to a combination of sunlight and vitamin supplements to meet their daily vitamin D needs.<\/p>\n<p>We can list the sources of vitamin D as follows:<\/p>\n<ul>\n<li><strong>Sunlight:<\/strong> Although it may vary depending on skin type and geographical location, on average, spending about 10 to 30 minutes in direct sunlight several times a week will help maintain adequate vitamin D levels in the body.<\/li>\n<li><strong>Food Sources:<\/strong> Fatty fish such as salmon, mackerel, tuna, egg yolks, and liver contain vitamin D naturally. Fortified foods such as milk, orange juice, and cereals also provide additional sources of vitamin D.<\/li>\n<li><strong>Supplements:<\/strong> Vitamin D supplements can help people who do not get enough sun or who do not get enough vitamin D from food.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"How_Much_Vitamin_D_Do_I_Need_Daily\"><\/span>How Much Vitamin D Do I Need Daily?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The recommended daily intake of vitamin D varies according to a person&#8217;s age, lifestyle, sun exposure, and health conditions. However, we can list the average vitamin D needs as follows.<\/p>\n<ul>\n<li><strong>Infants (0-12 months):<\/strong> 400 IU daily (International Unit)<\/li>\n<li><strong>Children (1-18 years):<\/strong> 600 IU daily<\/li>\n<li><strong>Adults (19-70 years):<\/strong> 600 IU daily<\/li>\n<li><strong>Adults over 70 years of age:<\/strong> 800 IU daily<\/li>\n<li><strong>Pregnant and lactating women:<\/strong> 600 IU daily<\/li>\n<\/ul>\n<p>However, some experts believe that people who hardly ever sunbathe or who already have a significant vitamin D deficiency should have a daily vitamin D intake of between 1,000-2,000 IU. At this point, it should be noted that excessive intake of vitamin D can lead to toxicity. Therefore, when using vitamin supplements, it would be correct to take these vitamins in the amounts recommended by your doctor.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_are_the_Causes_of_Vitamin_D_Deficiency\"><\/span>What are the Causes of Vitamin D Deficiency?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vitamin D deficiency can occur for various reasons. We can list the main causes of vitamin D deficiency as follows:<\/p>\n<ul>\n<li><strong>Insufficient Sunbathing:<\/strong> People who stay indoors during the day, live in areas with long winters, or constantly use sunscreen will not be able to benefit enough from sun rays, a source of vitamin D.<\/li>\n<li><strong>Causes of Nutrition Programme:<\/strong> Those who follow a vegan or vegetarian diet or those who do not consume fortified foods may have difficulty meeting their daily vitamin D needs.<\/li>\n<li><strong>Medical Conditions:<\/strong> Some conditions, such as Crohn&#8217;s disease, celiac disease, and kidney or liver disorders, can affect Vitamin D absorption and cause deficiency.<\/li>\n<li><strong>Age-Related Factors:<\/strong> With age, the body&#8217;s performance in synthesizing Vitamin D from sunlight decreases. Accordingly, vitamin D deficiency may occur.<\/li>\n<li><strong>Dark Skin Tone:<\/strong> As the skin color darkens, the melanin level in the skin increases. High melanin levels reduce the body&#8217;s ability to produce vitamin D from sunlight. This makes dark-skinned people more susceptible to vitamin D deficiency.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"What_are_the_Symptoms_of_Vitamin_D_Deficiency\"><\/span>What are the Symptoms of Vitamin D Deficiency?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vitamin D deficiency usually develops gradually and symptoms may be mild at first. However, long-term deficiency can lead to serious health problems. Common symptoms include:<\/p>\n<ul>\n<li>Pain in bones and muscles due to deficiency in calcium absorption<\/li>\n<li>Feeling tired and weak<\/li>\n<li>Frequent illness due to a weakened immune system<\/li>\n<li>Depression or mood changes<\/li>\n<li>Slow healing of wounds<\/li>\n<\/ul>\n<p>If these symptoms persist for a long time, it may be necessary to have a blood test to check vitamin D levels in the body. If vitamin D deficiency is observed, your doctor may recommend some changes in your diet and lifestyle.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Does_Vitamin_D_Supplementation_Improve_Immune_Function\"><\/span>Does Vitamin D Supplementation Improve Immune Function?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Perhaps the most essential feature of vitamin D that makes it indispensable is that it strengthens the immune system by increasing the function of immune cells. When taken in adequate amounts, vitamin D can help protect against infections in general, including respiratory diseases. In addition, research is ongoing into its potential role in reducing the severity of autoimmune diseases and chronic inflammation.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_to_Use_Vitamin_D_Supplements\"><\/span>How to Use Vitamin D Supplements?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>For Vitamin D supplementation, a blood test should first be performed to measure the level of vitamin D in the body. Once the vitamin D deficiency level is determined, your doctor will direct you to take vitamin D specific to your condition. We can list some of the issues that should be considered in the use of vitamin D supplements as follows:<\/p>\n<ul>\n<li><strong>Choosing the Right Vitamin D:<\/strong> Animal-based Vitamin D3 (cholecalciferol) is more effective than plant-based Vitamin D2 (ergocalciferol) in raising blood levels.<\/li>\n<li><strong>Consumption with Meals:<\/strong> Since Vitamin D is a fat-soluble vitamin, taking it with a meal containing healthy fats can increase the absorption of the vitamin by the body.<\/li>\n<li><strong>Consumption in Correct Amounts:<\/strong> Use the amounts determined by your doctor according to your needs.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Estimated reading time: 6 minutes 5 seconds What is Vitamin D and Why is it Important for the Body? Vitamin D, which we can obtain by synthesizing sunlight in our bodies or through some foods, is an important vitamin that plays a role in many areas, such as bone health, strengthening the immune system, improving [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":11342,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-11341","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.aktifinternational.com\/en\/wp-json\/wp\/v2\/posts\/11341","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.aktifinternational.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.aktifinternational.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.aktifinternational.com\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.aktifinternational.com\/en\/wp-json\/wp\/v2\/comments?post=11341"}],"version-history":[{"count":1,"href":"https:\/\/www.aktifinternational.com\/en\/wp-json\/wp\/v2\/posts\/11341\/revisions"}],"predecessor-version":[{"id":11343,"href":"https:\/\/www.aktifinternational.com\/en\/wp-json\/wp\/v2\/posts\/11341\/revisions\/11343"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.aktifinternational.com\/en\/wp-json\/wp\/v2\/media\/11342"}],"wp:attachment":[{"href":"https:\/\/www.aktifinternational.com\/en\/wp-json\/wp\/v2\/media?parent=11341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.aktifinternational.com\/en\/wp-json\/wp\/v2\/categories?post=11341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.aktifinternational.com\/en\/wp-json\/wp\/v2\/tags?post=11341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}