{"id":7994,"date":"2026-10-06T11:39:00","date_gmt":"2026-10-06T11:39:00","guid":{"rendered":"https:\/\/bioprofile.com\/?p=7994"},"modified":"2026-10-01T23:08:58","modified_gmt":"2026-10-01T23:08:58","slug":"what-is-metabolism-basal-age-disease","status":"publish","type":"post","link":"https:\/\/bioprofile.com\/en\/what-is-metabolism-basal-age-disease\/","title":{"rendered":"What is metabolism: your basal metabolism, how it changes with age and when it points to a disease"},"content":{"rendered":"\n<article class=\"wp-block-group bp-blog is-layout-flow wp-block-group-is-layout-flow\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n<link rel=\"stylesheet\" href=\"https:\/\/fonts.googleapis.com\/css2?family=Poppins:wght@300;400;500;600;700&#038;display=swap\">\n<style id=\"bp-blog-design\">\n.bp-blog {\n  --bp-ink: #212527; --bp-teal: #005859; --bp-teal-deep: #006B62; --bp-emerald: #228A62;\n  --bp-green: #7CA74D; --bp-lime: #B7CB33; --bp-lime-soft: #B7CB3329; --bp-green-aa: #4F6B28;\n  --bp-beige: #EDEAE5; --bp-sand: #DBD4CB; --bp-pale-teal: #D9E6E6; --bp-white: #FFFFFF;\n  --bp-foot: #6b6b6b;\n  --bp-font: 'Poppins','Segoe UI',Arial,sans-serif;\n  --bp-fs-h1: 40px; --bp-fs-h2: 29px; --bp-fs-h3: 21px; --bp-fs-body: 17px;\n  --bp-fs-lead: 19px; --bp-fs-small: 14px; --bp-fs-foot: 13px; --bp-fs-btn: 17px;\n  --bp-lh-body: 1.75;\n  --bp-s-2: 8px; --bp-s-3: 12px; --bp-s-4: 16px; --bp-s-5: 24px; --bp-s-6: 32px;\n  --bp-s-7: 44px; --bp-s-8: 72px;\n  --bp-measure: 875px; --bp-prose: 875px; --bp-side: 40px; --bp-portrait: 132px;\n  --bp-radius-card: 20px; --bp-radius-btn: 10px; --bp-radius-chip: 999px;\n  --bp-shadow: 0 10px 30px rgba(0,88,89,0.10); --bp-shadow-soft: 0 2px 10px rgba(0,88,89,0.06);\n  font-family: var(--bp-font); font-size: var(--bp-fs-body); line-height: var(--bp-lh-body);\n  color: var(--bp-ink); background: var(--bp-white); -webkit-font-smoothing: antialiased;\n}\n.bp-blog, .bp-blog * { box-sizing: border-box; }\n.bp-blog p, .bp-blog li, .bp-blog h1, .bp-blog h2, .bp-blog h3, .bp-blog a, .bp-blog td,\n.bp-blog th, .bp-blog cite { overflow-wrap: break-word; min-width: 0; }\n.bp-blog h1, .bp-blog h2, .bp-blog h3 { text-wrap: balance; }\n.bp-blog p, .bp-blog li { text-wrap: pretty; }\n\/* WordPress core's flow layout puts 24px above every child after the first; inside\n   a grid or a flex row that is a misalignment (measured on the scan pages 2026-08-21) *\/\n.bp-blog .bp-blog-author > *, .bp-blog .bp-blog-related > *, .bp-blog .bp-blog-verify > * { margin-block: 0; }\n\n\/* --- sections: one column, the article measure, the section rhythm ------------ *\/\n.bp-blog-sec { position: relative; background: var(--bp-white); margin-block: 0;\n  padding-block: var(--bp-s-7);\n  padding-inline: max(var(--bp-side), calc((100% - var(--bp-measure)) \/ 2)); }\n.bp-blog-sec > *:last-child { margin-block-end: 0; }\n.bp-blog-sec > p, .bp-blog-sec > ul, .bp-blog-sec > ol, .bp-blog-sec > .wp-block-quote,\n.bp-blog-sec > .bp-blog-faq-item, .bp-blog-sec > .bp-blog-takeaways, .bp-blog-sec > .bp-blog-toc,\n.bp-blog-sec > .bp-blog-refs, .bp-blog-sec > .bp-blog-srclead { max-width: var(--bp-prose); }\n.bp-blog-sec--head { padding-block: var(--bp-s-7) 0; }\n.bp-blog-sec--body { padding-block: var(--bp-s-6) var(--bp-s-7); }\n.bp-blog-sec--beige { background: var(--bp-beige); }\n.bp-blog-sec--wash { background: linear-gradient(180deg, #B7CB331A 0%, #B7CB330D 100%), #FFFFFF; }\n.bp-blog-sec--tight { padding-block: var(--bp-s-6); }\n\/* A COLOURED SECTION IS A PANEL, so it carries the panel radius. 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The scan is not a diagnosis.<\/li>\n\n<\/ul>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-toc is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-toclabel wp-block-paragraph\">Contents<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n\n<li><a href=\"#wat-is-metabolisme\">What is metabolism<\/a><\/li>\n\n\n<li><a href=\"#wat-is-basaal-metabolisme\">What is basal metabolism<\/a><\/li>\n\n\n<li><a href=\"#wat-is-metabolisme-leeftijd-voor-leeftijd\">What is metabolism, age by age<\/a><\/li>\n\n\n<li><a href=\"#wat-je-metabolisme-verhoogt-en-verlaagt\">What raises and lowers your metabolism<\/a><\/li>\n\n\n<li><a href=\"#wat-is-metabolisme-ziekte-en-schildklier-wanneer-het-op-een-ziekte-wijst\">What is metabolism, disease and the thyroid: when it points to a disease<\/a><\/li>\n\n\n<li><a href=\"#wat-de-scan-meet-en-wat-niet\">What the scan measures and what it doesn&#8217;t<\/a><\/li>\n\n\n<li><a href=\"#samengevat\">In summary<\/a><\/li>\n\n\n<li><a href=\"#veelgestelde-vragen\">Frequently asked questions<\/a><\/li>\n\n<\/ol>\n\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"wat-is-metabolisme\">What is metabolism<\/h2>\n\n\n\n<p class=\"bp-blog-lead wp-block-paragraph\">In this article you&#8217;ll read what metabolism is, what your basal metabolism is, how both change with age and when a slow or fast metabolism can point to a disease. That matters, because the word is used loosely, and knowing the parts tells you which part can be influenced and which signs mean you&#8217;d do better to see a doctor. Metabolism, what is it in plain words? The energy your body uses in a day. Researchers split that energy into three parts: your basal metabolism, the energy it takes to digest food, and the energy of movement.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">4<\/a><\/sup> <a href=\"https:\/\/bioprofile.com\/en\/metabolism-test\/\">The BioProfile metabolism scan<\/a> gives you an indication of where you stand today in this area. It&#8217;s self-insight, meant to help you make better choices in your diet and lifestyle. It is not a diagnosis. Only a doctor can make one.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"wat-is-basaal-metabolisme\">What is basal metabolism<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Your basal metabolism is the energy your body uses at rest, just to keep running. That&#8217;s about two thirds of the energy you use in a day.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> How high it is depends on your weight, age, height and sex, and muscle tissue uses far more energy than fat tissue.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Scottish study measured basal metabolism in 150 adults and looked at what explained the differences between them. Fat-free mass, meaning everything in the body except fat, explained by far the largest share. Fat mass and age explained only a small part. Once body composition was taken into account, sex made no clear difference.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup> In men, the thyroid hormone thyroxine in the blood explained part of what remained. In women, thyroxine made no clear difference.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What this means for you: two people with the same weight can use quite different amounts of energy at rest, and the main reason is how much of that weight is muscle and organs. At the same body weight, women have about 10% more fat tissue than men, which is why their basal metabolism is lower.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"wat-is-metabolisme-leeftijd-voor-leeftijd\">What is metabolism, age by age<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A large study pooled measurements of daily energy expenditure in people aged 8 days to 95 years. It used doubly labelled water, a method that measures energy expenditure during normal everyday life. After adjusting for fat-free mass, energy expenditure rose to about 50% above adult levels around the first birthday. After that it fell slowly, reaching adult levels at about 20. From 20 to 60 it stayed stable, and after 60 it declined.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Put simply: once you account for body size, your metabolism in your forties runs largely the way it did in your twenties. The real slowdown only comes after 60.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a><\/sup> What does change earlier is what the body is made of. As you get older, fat tissue increases and muscle tissue decreases, and that lowers your basal metabolism.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"wat-je-metabolisme-verhoogt-en-verlaagt\">What raises and lowers your metabolism<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Processing food takes energy. On a mixed diet, that is 5 to 15% of the day&#8217;s energy expenditure. It is higher when a meal contains relatively a lot of protein or alcohol, and lower when it contains a lot of fat. Protein also helps you feel full.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">4<\/a><\/sup> In practice, this means a meal with more protein takes a little more energy to process and keeps you full for longer. It is a small part of the daily total.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Your weight plays a part as well. In a study of 18 adults with obesity and 23 who had never had obesity, researchers held each person&#8217;s weight 10% below their starting weight. Daily energy expenditure then fell clearly in both groups, even when calculated per kilo of fat-free mass. When weight was held 10% above the starting weight, energy expenditure rose. The authors conclude that the body adjusts its energy expenditure to resist a weight that differs from its usual one.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">6<\/a><\/sup> For you, this means your metabolism adapts in both directions, which helps explain why holding on to a new weight takes effort.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"wat-is-metabolisme-ziekte-en-schildklier-wanneer-het-op-een-ziekte-wijst\">What is metabolism, illness and the thyroid: when it points to a disease<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Some conditions change your metabolism in a way you may notice, and the thyroid is one of them. When the thyroid works too slowly, Thuisarts lists feeling cold easily, gaining weight, feeling tired or sluggish, hard stools, dry hair with more hair loss, and dry skin.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">7<\/a><\/sup> When the thyroid works too fast, the signs are: your weight dropping while you eat as you normally do, restlessness, anxiety or irritability, a fast heartbeat, sweating a lot, sleeping badly, trembling, diarrhoea, a swelling in the neck and problems with the eyes.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">8<\/a><\/sup> You can read how a slow metabolism feels in everyday life in <a href=\"https:\/\/bioprofile.com\/en\/slow-metabolism-symptoms-and-what-a-scan-measures\/\">slow metabolism: symptoms and what a scan measures<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thyroid problems are common in the Netherlands. Of the 152,180 people taking part in the Dutch Lifelines study, 3.1% were taking thyroid medication. Of those who were not, 10.8% had an abnormal TSH, the blood value that shows how hard the body is driving the thyroid. The researchers report many thyroid conditions that had gone unnoticed.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">3<\/a><\/sup> In short, about one in ten adults may have a thyroid value outside the normal range without knowing it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Metabolic syndrome is the other metabolic condition that the Dutch studies count. Of 74,857 people taking part in Lifelines, 17.5% of men and 10.6% of women had metabolic syndrome at the start. Over about four years, it newly developed in 7.8% of men and 13.2% of women, and how often it developed differed by occupation.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">9<\/a><\/sup> The thyroid and metabolic syndrome are linked too: among 26,719 participants with normal thyroid function, people with the highest levels of the thyroid hormone FT3 had metabolic syndrome more often than people with the lowest, even within the normal range.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">10<\/a><\/sup> What this means for you: metabolic syndrome is common, it can develop in adulthood, and thyroid hormones and metabolic health go hand in hand.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you recognise several of these signs, your GP can measure free T4 and TSH in your blood. If your thyroid works too fast, your GP refers you to the hospital, where an internist looks into it further.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">8<\/a><\/sup> If you already know your thyroid works too slowly, Thuisarts advises contacting your GP if your symptoms get worse or come back.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">7<\/a><\/sup><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"wat-de-scan-meet-en-wat-niet\">What the scan measures and what it does not<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The metabolism scan gives you a score for where you stand today and a baseline to compare against later. What the scan asks and what it is based on is set out on the scan page. The scan doesn&#8217;t take blood, so it doesn&#8217;t measure thyroid hormones or TSH. For that you need a blood test.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">8<\/a><\/sup> The scan is not a diagnosis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"samengevat\">In summary<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">What your metabolism is: the energy your body uses in a day, made up of your basal metabolism, the cost of digesting food and the energy of movement. Your basal metabolism is the largest part of it and depends mainly on how much muscle and other fat-free mass you carry. Once you account for body size, metabolism stays stable from 20 to 60 and declines after that. Food and weight change it to a modest degree. A thyroid that works too slowly or too fast changes it in a way you may notice, and a blood test at your GP shows whether that is the case.<\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-cta is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\">Measure where you start<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">One short scan, and your metabolism score is in your dashboard. What the metabolism scan measures and what it is based on is set out on the scan page.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/bioprofile.com\/en\/metabolism-test\/\">Start the metabolism scan<\/a><\/div>\n\n<\/div>\n\n\n\n<p class=\"bp-blog-ctamicro wp-block-paragraph\">Free, about 3 minutes. An analysis of your answers, never a diagnosis. <a href=\"https:\/\/bioprofile.com\/en\/free-health-check-tests\/\">All health scans<\/a><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--wash is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"veelgestelde-vragen\">Frequently asked questions<\/h2>\n\n\n\n<div class=\"wp-block-group bp-blog-faq-item is-layout-flow wp-block-group-is-layout-flow\">\n\n<h3 class=\"wp-block-heading\">What is a normal metabolism?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">What counts as normal differs from person to person, mostly because bodies carry different amounts of fat-free mass. In a study of 150 adults, fat-free mass explained by far the largest share of the differences in basal metabolism.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup> Once you take body size into account, metabolism stays stable between roughly 20 and 60 years of age.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a><\/sup><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-faq-item is-layout-flow wp-block-group-is-layout-flow\">\n\n<h3 class=\"wp-block-heading\">What is bad for your metabolism?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">As you get older, fat tissue increases and muscle tissue decreases, and that lowers your basal metabolism.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> Your body also pushes back when your weight is held below your usual weight: in one study, daily energy expenditure then fell clearly, even when calculated per kilo of fat-free mass.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">6<\/a><\/sup><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-faq-item is-layout-flow wp-block-group-is-layout-flow\">\n\n<h3 class=\"wp-block-heading\">How do you boost your metabolism?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Muscle tissue uses far more energy than fat tissue, so more muscle in your weight means a higher basal metabolism.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> Protein takes more energy for your body to process than carbohydrates or fat, and protein helps you feel full.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">4<\/a><\/sup> Both effects are real and modest.<\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-faq-item is-layout-flow wp-block-group-is-layout-flow\">\n\n<h3 class=\"wp-block-heading\">What are the symptoms of a slow metabolism?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If your thyroid works too slowly, Thuisarts lists feeling cold easily, gaining weight, feeling tired or slow, hard stools, dry hair with more hair loss, and dry skin.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">7<\/a><\/sup> Whether your thyroid is the cause is something a doctor checks with a blood test for free T4 and TSH.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">8<\/a><\/sup><\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-faq-item is-layout-flow wp-block-group-is-layout-flow\">\n\n<h3 class=\"wp-block-heading\">Does the scan show whether something is wrong with my metabolism?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The scan shows where you stand today and gives you a baseline to compare against later. The scan doesn&#8217;t take blood, so it doesn&#8217;t measure thyroid hormones; for that you need a blood test.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">8<\/a><\/sup> The scan is not a diagnosis.<\/p>\n\n<\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--beige bp-blog-sec--tight is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\" id=\"bronnen\">Sources<\/h2>\n\n\n\n<p class=\"bp-blog-srclead wp-block-paragraph\">Every source below was checked on the day this article was published. The numbering follows the text.<\/p>\n\n\n\n<ol class=\"wp-block-list bp-blog-refs\">\n\n<li>Voedingscentrum. Basaalstofwisseling (encyclopedie). Accessed 2026-10-01. <a href=\"https:\/\/www.voedingscentrum.nl\/encyclopedie\/basaalstofwisseling.aspx\">voedingscentrum.nl<\/a><\/li>\n\n\n<li>Pontzer H, Yamada Y, Sagayama H, et al.; IAEA DLW Database Consortium. Daily energy expenditure through the human life course. Science, 2021. <a href=\"https:\/\/doi.org\/10.1126\/science.abe5017\">doi.org\/10.1126\/science.abe5017<\/a><\/li>\n\n\n<li>Wouters HJCM, Slagter SN, Muller Kobold AC, van der Klauw MM, Wolffenbuttel BHR. Epidemiology of thyroid disorders in the Lifelines Cohort Study (the Netherlands). PLoS One, 2020. <a href=\"https:\/\/doi.org\/10.1371\/journal.pone.0242795\">doi.org\/10.1371\/journal.pone.0242795<\/a><\/li>\n\n\n<li>Westerterp KR. Diet induced thermogenesis. Nutrition and Metabolism (London), 2004. <a href=\"https:\/\/doi.org\/10.1186\/1743-7075-1-5\">doi.org\/10.1186\/1743-7075-1-5<\/a><\/li>\n\n\n<li>Johnstone AM, Murison SD, Duncan JS, Rance KA, Speakman JR. Factors influencing variation in basal metabolic rate include fat-free mass, fat mass, age, and circulating thyroxine but not sex, circulating leptin, or triiodothyronine. The American Journal of Clinical Nutrition, 2005. <a href=\"https:\/\/doi.org\/10.1093\/ajcn\/82.5.941\">doi.org\/10.1093\/ajcn\/82.5.941<\/a><\/li>\n\n\n<li>Leibel RL, Rosenbaum M, Hirsch J. Changes in energy expenditure resulting from altered body weight. The New England Journal of Medicine, 1995. <a href=\"https:\/\/doi.org\/10.1056\/NEJM199503093321001\">doi.org\/10.1056\/NEJM199503093321001<\/a><\/li>\n\n\n<li>Thuisarts.nl (NHG). Mijn schildklier werkt te langzaam. Accessed 2026-10-01. <a href=\"https:\/\/www.thuisarts.nl\/te-langzaam-werkende-schildklier\/mijn-schildklier-werkt-te-langzaam\">thuisarts.nl<\/a><\/li>\n\n\n<li>Thuisarts.nl (NHG). Mijn schildklier werkt te snel. Accessed 2026-10-01. <a href=\"https:\/\/www.thuisarts.nl\/te-snel-werkende-schildklier\/mijn-schildklier-werkt-te-snel\">thuisarts.nl<\/a><\/li>\n\n\n<li>van Zon SKR, Amick III BC, de Jong T, Brouwer S, B\u00fcltmann U. Occupational distribution of metabolic syndrome prevalence and incidence differs by sex and is not explained by age and health behavior. BMJ Open Diabetes Research and Care, 2020. <a href=\"https:\/\/doi.org\/10.1136\/bmjdrc-2020-001436\">doi.org\/10.1136\/bmjdrc-2020-001436<\/a><\/li>\n\n\n<li>Wolffenbuttel BHR, Wouters HJCM, Slagter SN, et al. Thyroid function and metabolic syndrome in the population-based LifeLines cohort study. BMC Endocrine Disorders, 2017. <a href=\"https:\/\/doi.org\/10.1186\/s12902-017-0215-1\">doi.org\/10.1186\/s12902-017-0215-1<\/a><\/li>\n\n<\/ol>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--tight is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\">Also read<\/h2>\n\n\n\n<div class=\"wp-block-group bp-blog-related is-layout-flow wp-block-group-is-layout-flow\">\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/bioprofile.com\/en\/slow-metabolism-symptoms-and-what-a-scan-measures\/\">Slow metabolism: the symptoms people mean, what your daily energy use depends on and what a scan measures<\/a><\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--tight is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\">Written by<\/h2>\n\n\n\n<div class=\"wp-block-group bp-blog-author is-layout-flow wp-block-group-is-layout-flow\">\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"320\" height=\"320\" src=\"https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/07\/author-jesse-round-320.jpg\" alt=\"Jesse van der Velde\" class=\"wp-image-4815\" srcset=\"https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/07\/author-jesse-round-320.jpg 320w, https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/07\/author-jesse-round-320-300x300.jpg 300w, https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/07\/author-jesse-round-320-150x150.jpg 150w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-group bp-blog-authorid is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-authorrole wp-block-paragraph\">Founder of BioProfile<\/p>\n\n\n\n<p class=\"bp-blog-authorname wp-block-paragraph\">Jesse van der Velde<\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-authorbody is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-authorbio wp-block-paragraph\">Jesse van der Velde has been guiding people to a new body and optimal health since 2006, and has written or co-written fifteen books on nutrition and health. Forever Young (2012) and Superfood Recipes (2013) both reached number 1 in the Netherlands.<\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-authormeta is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-authorbio wp-block-paragraph\"><a href=\"https:\/\/nl.linkedin.com\/in\/jessevdv\">LinkedIn<\/a><\/p>\n\n\n\n<p class=\"bp-blog-dates wp-block-paragraph\">Published on 6 October 2026 \u00b7 Last updated on 6 October 2026<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-sec bp-blog-sec--foot is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"bp-blog-legal wp-block-paragraph\">BioProfile analyses your health status to guide you and your coach. It does not make a diagnosis, only a doctor can do that. Built on validated health questionnaires; the combined BioProfile score is not itself a validated clinical instrument yet. Your answers stay private (GDPR).<\/p>\n\n<\/div>\n\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>What is metabolism? What your basal metabolism is, how it changes with age, when a slow or overactive thyroid plays a part and what a scan measures.<\/p>\n","protected":false},"author":18,"featured_media":7690,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_meta-robots-noindex":"2","_yoast_wpseo_opengraph-image":"","_yoast_wpseo_opengraph-image-id":"","_yoast_wpseo_twitter-image":"","_yoast_wpseo_twitter-image-id":"","inline_featured_image":false,"footnotes":""},"categories":[74],"tags":[],"class_list":["post-7994","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-metabolic-health-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is metabolism: basal metabolism, age, disease | BioProfile<\/title>\n<meta name=\"description\" content=\"What is metabolism? 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