{"id":11019146,"date":"2026-05-21T11:33:36","date_gmt":"2026-05-21T11:33:36","guid":{"rendered":"https:\/\/labtest.nl\/?p=11019146"},"modified":"2026-08-27T07:37:24","modified_gmt":"2026-08-27T07:37:24","slug":"constantly-tired-these-could-be-the-possible-causes-and-solutions","status":"publish","type":"post","link":"https:\/\/labtest.nl\/en\/vitamin-and-mineral-tests\/constantly-tired-these-could-be-the-possible-causes-and-solutions\/","title":{"rendered":"Constantly tired? These could be the possible causes and solutions."},"content":{"rendered":"\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-1024x683.jpg\" alt=\"vermoeidheid vrouw\" class=\"wp-image-11015592 size-full\" srcset=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-1024x683.jpg 1024w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-300x200.jpg 300w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-768x512.jpg 768w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-1536x1024.jpg 1536w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-2048x1365.jpg 2048w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-480x320.jpg 480w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-640x427.jpg 640w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-900x600.jpg 900w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-1280x853.jpg 1280w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-1440x960.jpg 1440w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-1700x1133.jpg 1700w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-vrouw-600x400.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"wp-block-paragraph\">Persistent fatigue: more than just \u201ca little tired\u201d? Everyone feels tired sometimes after a busy day at work, a poor night\u2019s sleep or a stressful period. But what if that fatigue lasts for weeks or even months? When you consistently have little energy, struggle to recover or feel drained without an obvious reason, it can have a major impact on your daily life.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Persistent fatigue<\/strong> is common and can have various causes. Sometimes <strong>lifestyle<\/strong>, <strong>diet<\/strong> or <strong>stress<\/strong> play a role, but deficiencies in vitamins and minerals or changes in certain health markers can also contribute to low energy levels.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this blog, you will learn more about possible causes of long-term fatigue, practical tips to improve your energy levels and which home tests can provide insight into important blood values.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-media-text alignwide has-media-on-the-right is-stacked-on-mobile\"><div class=\"wp-block-media-text__content\">\n<h2 class=\"wp-block-heading\">What is persistent fatigue?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Everyone feels tired from time to time, but with persistent fatigue, the feeling of exhaustion lasts longer. You may notice that you have less energy, become overwhelmed more easily or have difficulty recovering after physical activity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common signs include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Low energy throughout the day<\/strong><\/li>\n\n\n\n<li><strong>Difficulty concentrating<\/strong><\/li>\n\n\n\n<li><strong>Reduced motivation<\/strong><\/li>\n\n\n\n<li><strong>Feeling exhausted quickly<\/strong><\/li>\n\n\n\n<li><strong>Poor sleep or waking up feeling restless<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Fatigue can be both physical and mental. It is therefore important not only to look at sleep, but also at diet, stress, hormones and overall health.<\/p>\n<\/div><figure class=\"wp-block-media-text__media\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-1024x683.jpg\" alt=\"vermoeidheid man\" class=\"wp-image-11015591 size-full\" srcset=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-1024x683.jpg 1024w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-300x200.jpg 300w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-768x513.jpg 768w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-1536x1025.jpg 1536w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-2048x1367.jpg 2048w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-480x320.jpg 480w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-640x427.jpg 640w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-900x601.jpg 900w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-1280x854.jpg 1280w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-1440x961.jpg 1440w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-1700x1135.jpg 1700w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/vermoeidheid-man-600x400.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-1024x683.jpg\" alt=\"stress vrouw\" class=\"wp-image-11015595 size-full\" srcset=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-1024x683.jpg 1024w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-300x200.jpg 300w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-768x512.jpg 768w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-1536x1024.jpg 1536w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-2048x1365.jpg 2048w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-480x320.jpg 480w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-640x427.jpg 640w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-900x600.jpg 900w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-1280x853.jpg 1280w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-1440x960.jpg 1440w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-1700x1133.jpg 1700w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/stress-vrouw-600x400.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h2 class=\"wp-block-heading\">Possible causes of long-term fatigue<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Vitamin or mineral deficiencies<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Low levels of vitamin D, vitamin B12 or iron, for example, can contribute to fatigue. These nutrients play an important role in energy production, muscle function and the transport of oxygen in the body.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Stress and mental strain<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Prolonged stress or pressure can cause your body to remain constantly \u201cswitched on\u201d. As a result, you may feel exhausted even when you get enough sleep.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Thyroid imbalance<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The thyroid affects, among other things, your metabolism and energy levels. When it is underactive, this can be accompanied by fatigue and a lack of energy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Poor sleep quality<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It is not only the amount of sleep that matters, but also its quality. Many people get enough hours of sleep but still wake up feeling tired.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-media-text alignwide has-media-on-the-right is-stacked-on-mobile\"><div class=\"wp-block-media-text__content\">\n<h2 class=\"wp-block-heading\">What can you do yourself if you are experiencing fatigue?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Maintain a regular routine<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A consistent sleep schedule helps your body recover better. Try to go to bed at around the same time every day.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Eat a varied diet<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Diet has a major influence on your energy levels. Make sure you get enough vegetables, protein, fibre, vitamins and minerals.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Stay active<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Light exercise such as walking or cycling can help you feel fitter and support your energy levels.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Take time to relax<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Make sure you have enough time to unwind and avoid keeping your body under prolonged stress.<\/p>\n<\/div><figure class=\"wp-block-media-text__media\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-1024x683.jpg\" alt=\"ontspannen koppel\" class=\"wp-image-11015597 size-full\" srcset=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-1024x683.jpg 1024w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-300x200.jpg 300w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-768x512.jpg 768w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-1536x1024.jpg 1536w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-2048x1365.jpg 2048w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-480x320.jpg 480w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-640x427.jpg 640w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-900x600.jpg 900w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-1280x853.jpg 1280w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-1440x960.jpg 1440w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-1700x1133.jpg 1700w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/onstpannen-koppel-buiten-600x400.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/02\/labtest-team-jonge-arts-1024x683.jpg\" alt=\"labtest team jonge arts\" class=\"wp-image-11014595 size-full\" srcset=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/02\/labtest-team-jonge-arts-1024x683.jpg 1024w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/02\/labtest-team-jonge-arts-300x200.jpg 300w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/02\/labtest-team-jonge-arts-768x512.jpg 768w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/02\/labtest-team-jonge-arts-480x320.jpg 480w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/02\/labtest-team-jonge-arts-640x427.jpg 640w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/02\/labtest-team-jonge-arts-900x600.jpg 900w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/02\/labtest-team-jonge-arts-1280x853.jpg 1280w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/02\/labtest-team-jonge-arts-1440x960.jpg 1440w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/02\/labtest-team-jonge-arts-600x400.jpg 600w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/02\/labtest-team-jonge-arts.jpg 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h2 class=\"wp-block-heading\">Home tests for fatigue symptoms<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">With our home tests with laboratory analysis, you can easily have certain blood values analysed from home using a finger prick. This can provide additional insight when you have been experiencing persistent fatigue.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Values that are often checked in cases of persistent fatigue include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Vitamin D<\/strong><\/li>\n\n\n\n<li><strong>Vitamin B12<\/strong><\/li>\n\n\n\n<li><strong>Iron<\/strong><\/li>\n\n\n\n<li><strong>Ferritin<\/strong><\/li>\n\n\n\n<li><strong>Thyroid levels<\/strong><\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-media-text alignwide has-media-on-the-right is-stacked-on-mobile\"><div class=\"wp-block-media-text__content\">\n<h2 class=\"wp-block-heading\">Frequently asked questions about fatigue<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. When should I take fatigue seriously?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If fatigue persists for a long time and affects your daily functioning, it may be advisable to seek further medical evaluation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Which deficiencies can cause low energy?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vitamin D, vitamin B12 and iron are among the nutrients often associated with fatigue.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Can stress really cause physical fatigue?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yes, prolonged stress can have a significant impact on both mental and physical energy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. How does a home test work?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You simply collect a small blood sample at home using a finger prick and send it free of charge to the laboratory using our included return envelope for analysis.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5. Are home tests reliable?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The analyses are performed in an ISO-certified laboratory. A home test can help provide more insight into certain values.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em><em><em>This blog is for informational purposes only and does not replace medical advice from a doctor. If your symptoms persist or you have concerns, always contact your doctor.<\/em><br><\/em><\/em><\/p>\n<\/div><figure class=\"wp-block-media-text__media\"><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-1024x576.jpg\" alt=\"man en vrouw vragen en denken\" class=\"wp-image-11015599 size-full\" srcset=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-1024x576.jpg 1024w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-300x169.jpg 300w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-768x432.jpg 768w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-1536x864.jpg 1536w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-2048x1152.jpg 2048w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-480x270.jpg 480w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-640x360.jpg 640w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-900x506.jpg 900w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-1280x720.jpg 1280w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-1440x810.jpg 1440w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-1700x956.jpg 1700w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/05\/man-vrouw-vragen-600x338.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<section class=\"featured\" id=\"featured\">\n\n\t<div class=\"featured__header container\" data-aos=\"fade-up\" data-aos-duration=\"1000\">\n\n        <h3 class=\"featured__title\">Our home tests with laboratory analysis<\/h3>        <div class=\"featured__text\">Gain insight into important blood values.<\/div>\n    <\/div>\n\n    <div class=\"row container\">\n\n                \t<ul class=\"products columns-2\" id=\"products\">\n\t            <li class=\"product type-product post-11018579 status-publish first instock product_cat-vitamin-and-mineral-tests has-post-thumbnail taxable shipping-taxable purchasable product-type-simple\">\n\t<a href=\"https:\/\/labtest.nl\/en\/tests\/vitamin-and-mineral-tests\/vitamin-d-test\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"woocommerce-product-gallery__image\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Vitamin D test\" srcset=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-300x300.png 300w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-1024x1024.png 1024w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-150x150.png 150w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-768x768.png 768w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-1536x1536.png 1536w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-2048x2048.png 2048w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-480x480.png 480w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-640x640.png 640w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-900x900.png 900w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-1280x1280.png 1280w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-1440x1440.png 1440w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-1700x1700.png 1700w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-600x600.png 600w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-d-test-100x100.png 100w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t<div class=\"woocommerce-loop-product__description\">\n\n\t<h2 class=\"woocommerce-loop-product__title\">Vitamin D test<\/h2><span class=\"price\"><span class=\"price__prefix\"><\/span> <span class=\"woocommerce-Price-amount amount\"><bdi><span class=\"woocommerce-Price-currencySymbol\" translate=\"no\">&euro;<\/span>43,00<\/bdi><\/span><\/span><\/a><div class=\"product__attributes\"><strong>Tested for:<\/strong><br\/>Vitamin D<\/div><span class=\"gtm4wp_productdata\" style=\"display:none; visibility:hidden;\" data-gtm4wp_product_data=\"{&quot;internal_id&quot;:11018579,&quot;item_id&quot;:&quot;gla_11018579&quot;,&quot;item_name&quot;:&quot;Vitamin D test&quot;,&quot;sku&quot;:&quot;LTVITD&quot;,&quot;price&quot;:43,&quot;stocklevel&quot;:null,&quot;stockstatus&quot;:&quot;instock&quot;,&quot;google_business_vertical&quot;:&quot;retail&quot;,&quot;item_category&quot;:&quot;Vitamin and mineral tests&quot;,&quot;id&quot;:&quot;gla_11018579&quot;,&quot;productlink&quot;:&quot;https:\\\/\\\/labtest.nl\\\/en\\\/tests\\\/vitamin-and-mineral-tests\\\/vitamin-d-test\\\/&quot;,&quot;item_list_name&quot;:&quot;General Product List&quot;,&quot;index&quot;:1,&quot;product_type&quot;:&quot;simple&quot;,&quot;item_brand&quot;:&quot;&quot;}\"><\/span>\t<\/div>\n<\/li><li class=\"product type-product post-11018591 status-publish last instock product_cat-vitamin-and-mineral-tests has-post-thumbnail taxable shipping-taxable purchasable product-type-simple\">\n\t<a href=\"https:\/\/labtest.nl\/en\/tests\/vitamin-and-mineral-tests\/vitamin-b12-test\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"woocommerce-product-gallery__image\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Vitamin B12 test\" srcset=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-300x300.png 300w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-1024x1024.png 1024w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-150x150.png 150w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-768x768.png 768w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-1536x1536.png 1536w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-2048x2048.png 2048w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-480x480.png 480w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-640x640.png 640w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-900x900.png 900w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-1280x1280.png 1280w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-1440x1440.png 1440w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-1700x1700.png 1700w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-600x600.png 600w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/vitamin-b12-test-100x100.png 100w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t<div class=\"woocommerce-loop-product__description\">\n\n\t<h2 class=\"woocommerce-loop-product__title\">Vitamin B12 test<\/h2><span class=\"price\"><span class=\"price__prefix\"><\/span> <span class=\"woocommerce-Price-amount amount\"><bdi><span class=\"woocommerce-Price-currencySymbol\" translate=\"no\">&euro;<\/span>43,00<\/bdi><\/span><\/span><\/a><div class=\"product__attributes\"><strong>Tested for:<\/strong><br\/>Vitamin B12<\/div><span class=\"gtm4wp_productdata\" style=\"display:none; visibility:hidden;\" data-gtm4wp_product_data=\"{&quot;internal_id&quot;:11018591,&quot;item_id&quot;:&quot;gla_11018591&quot;,&quot;item_name&quot;:&quot;Vitamin B12 test&quot;,&quot;sku&quot;:&quot;LTVITB12&quot;,&quot;price&quot;:43,&quot;stocklevel&quot;:null,&quot;stockstatus&quot;:&quot;instock&quot;,&quot;google_business_vertical&quot;:&quot;retail&quot;,&quot;item_category&quot;:&quot;Vitamin and mineral tests&quot;,&quot;id&quot;:&quot;gla_11018591&quot;,&quot;productlink&quot;:&quot;https:\\\/\\\/labtest.nl\\\/en\\\/tests\\\/vitamin-and-mineral-tests\\\/vitamin-b12-test\\\/&quot;,&quot;item_list_name&quot;:&quot;General Product List&quot;,&quot;index&quot;:2,&quot;product_type&quot;:&quot;simple&quot;,&quot;item_brand&quot;:&quot;&quot;}\"><\/span>\t<\/div>\n<\/li><li class=\"product type-product post-11018784 status-publish first instock product_cat-general-health-tests has-post-thumbnail taxable shipping-taxable purchasable product-type-simple\">\n\t<a href=\"https:\/\/labtest.nl\/en\/tests\/general-health-tests\/thyroid-test\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><div class=\"woocommerce-product-gallery__image\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Thyroid test\" srcset=\"https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-300x300.png 300w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-1024x1024.png 1024w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-150x150.png 150w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-768x768.png 768w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-1536x1536.png 1536w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-2048x2048.png 2048w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-480x480.png 480w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-640x640.png 640w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-900x900.png 900w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-1280x1280.png 1280w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-1440x1440.png 1440w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-1700x1700.png 1700w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-600x600.png 600w, https:\/\/labtest.nl\/wp-content\/uploads\/2026\/08\/thyroid-test-100x100.png 100w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t<div class=\"woocommerce-loop-product__description\">\n\n\t<h2 class=\"woocommerce-loop-product__title\">Thyroid test<\/h2><span class=\"price\"><span class=\"price__prefix\"><\/span> <span class=\"woocommerce-Price-amount amount\"><bdi><span class=\"woocommerce-Price-currencySymbol\" translate=\"no\">&euro;<\/span>69,00<\/bdi><\/span><\/span><\/a><div class=\"product__attributes\"><strong>Tested for:<\/strong><br\/>FT3, FT4, TSH (Thyroid-stimulating hormone)<\/div><span class=\"gtm4wp_productdata\" style=\"display:none; visibility:hidden;\" data-gtm4wp_product_data=\"{&quot;internal_id&quot;:11018784,&quot;item_id&quot;:&quot;gla_11018784&quot;,&quot;item_name&quot;:&quot;Thyroid test&quot;,&quot;sku&quot;:&quot;LTTHYR&quot;,&quot;price&quot;:69,&quot;stocklevel&quot;:null,&quot;stockstatus&quot;:&quot;instock&quot;,&quot;google_business_vertical&quot;:&quot;retail&quot;,&quot;item_category&quot;:&quot;General health tests&quot;,&quot;id&quot;:&quot;gla_11018784&quot;,&quot;productlink&quot;:&quot;https:\\\/\\\/labtest.nl\\\/en\\\/tests\\\/general-health-tests\\\/thyroid-test\\\/&quot;,&quot;item_list_name&quot;:&quot;General Product List&quot;,&quot;index&quot;:3,&quot;product_type&quot;:&quot;simple&quot;,&quot;item_brand&quot;:&quot;&quot;}\"><\/span>\t<\/div>\n<\/li>\t        <\/ul>\n        \n    <\/div>\n\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Persistent fatigue: more than just \u201ca little tired\u201d? Everyone feels tired sometimes after a busy day at work, a poor night\u2019s sleep or a stressful period. But what if that fatigue lasts for weeks or even months? When you consistently have little energy, struggle to recover or feel drained without an obvious reason, it can [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":11019145,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[401],"tags":[455,459,450],"class_list":["post-11019146","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vitamin-and-mineral-tests","tag-fatigue","tag-low-energy","tag-tired"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Constantly tired? These could be the possible causes and solutions. | Labtest.nl |<\/title>\n<meta name=\"description\" content=\"Always tired or low on energy? Read about possible causes of persistent fatigue, practical tips and our home tests with laboratory analysis.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/labtest.nl\/en\/vitamin-and-mineral-tests\/constantly-tired-these-could-be-the-possible-causes-and-solutions\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Constantly tired? These could be the possible causes and solutions. | Labtest.nl |\" \/>\n<meta property=\"og:description\" content=\"Always tired or low on energy? 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