{"id":6651,"date":"2026-09-29T12:50:00","date_gmt":"2026-09-29T12:50:00","guid":{"rendered":"https:\/\/bioprofile.com\/?p=6651"},"modified":"2026-10-01T17:47:57","modified_gmt":"2026-10-01T17:47:57","slug":"slow-metabolism-symptoms-and-what-a-scan-measures","status":"publish","type":"post","link":"https:\/\/bioprofile.com\/en\/slow-metabolism-symptoms-and-what-a-scan-measures\/","title":{"rendered":"Slow metabolism: the symptoms people mean, what your daily energy expenditure depends on and what a scan measures"},"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. Measured on the\n   live site 2026-08-28 rather than chosen: bioprofile.com's own coloured blocks\n   come in two families, full-bleed strips (w=1440 edge to edge, radius 0, 40px\n   side padding) and inset panels (the lime block w=677 and the sand block w=576,\n   both radius 16px). Ours cannot be the first: the theme's content wrapper is\n   1140px, so a coloured section here stops 150px short of the screen on both\n   sides and reads as an inset panel with square corners, which is the thing the\n   operator saw. So it takes the panel treatment. The radius is this template's\n   own --bp-radius-card (20px, shared with the scan pages) rather than the site's\n   16px, so the page carries ONE panel radius instead of a third value.\n   The small vertical margin is what lets the corners read where two coloured\n   panels stack (the CTA, the FAQ wash and the sources beige run consecutively). *\/\n.bp-blog .bp-blog-sec--beige, .bp-blog .bp-blog-sec--wash, .bp-blog .bp-blog-cta {\n  border-radius: var(--bp-radius-card); margin-block: var(--bp-s-3); }\n.bp-blog-sec--foot { padding-block: var(--bp-s-5) var(--bp-s-7); border-top: 1px solid var(--bp-sand); }\n.bp-blog .bp-blog-rule { height: 6px; border: 0; margin-block: 0; max-width: none;\n  background: linear-gradient(90deg, #005859 0%, #006B62 38%, #228A62 66%, #B7CB33 100%); }\n\n\/* --- core blocks by element ------------------------------------------------- *\/\n.bp-blog p { font-size: var(--bp-fs-body); line-height: var(--bp-lh-body); margin-block: 0 var(--bp-s-5); }\n.bp-blog h1 { font-size: var(--bp-fs-h1); font-weight: 700; line-height: 1.22; letter-spacing: -0.01em;\n  margin-block: 0 var(--bp-s-4); color: var(--bp-ink); max-width: var(--bp-measure); }\n.bp-blog h2 { font-size: var(--bp-fs-h2); font-weight: 700; line-height: 1.3; letter-spacing: -0.01em;\n  color: var(--bp-ink); margin-block: var(--bp-s-4) var(--bp-s-4); padding-block-start: var(--bp-s-4);\n  position: relative; max-width: var(--bp-prose); }\n.bp-blog h2::before { content: \"\"; position: absolute; top: 0; left: 0; width: 56px; height: 4px;\n  border-radius: 2px; background: var(--bp-lime); }\n.bp-blog h3 { font-size: var(--bp-fs-h3); font-weight: 700; line-height: 1.35; color: var(--bp-teal);\n  margin-block: var(--bp-s-2) var(--bp-s-3); max-width: var(--bp-prose); }\n.bp-blog ul, .bp-blog ol { font-size: var(--bp-fs-body); line-height: var(--bp-lh-body);\n  margin-block: 0 var(--bp-s-5); padding-left: var(--bp-s-5); }\n.bp-blog li { margin-block-end: var(--bp-s-2); }\n.bp-blog a { color: var(--bp-teal); text-decoration: underline; text-underline-offset: 2px; }\n.bp-blog a:hover { color: var(--bp-green); }\n.bp-blog strong { font-weight: 600; }\n.bp-blog .wp-block-quote { border-left: 4px solid var(--bp-lime); margin: 0 0 var(--bp-s-5);\n  padding: var(--bp-s-2) 0 var(--bp-s-2) var(--bp-s-5); font-style: normal; }\n.bp-blog .wp-block-quote p { margin-block: 0 var(--bp-s-2); }\n.bp-blog .wp-block-quote cite { font-size: var(--bp-fs-small); color: var(--bp-foot); font-style: normal; }\n.bp-blog .wp-block-table { margin: 0 0 var(--bp-s-5); overflow-x: auto; }\n.bp-blog .wp-block-table table { border-collapse: collapse; width: 100%; font-size: var(--bp-fs-small); }\n.bp-blog .wp-block-table th, .bp-blog .wp-block-table td { border: 1px solid var(--bp-sand);\n  padding: var(--bp-s-2) var(--bp-s-3); text-align: left; vertical-align: top; }\n.bp-blog .wp-block-table th { background: var(--bp-beige); font-weight: 600; }\n.bp-blog .wp-block-image { margin: 0 0 var(--bp-s-5); }\n.bp-blog .wp-block-image img { display: block; width: 100%; height: auto;\n  border-radius: var(--bp-radius-card); box-shadow: var(--bp-shadow); }\n.bp-blog .wp-block-image figcaption { font-size: var(--bp-fs-foot); line-height: 1.6; color: var(--bp-foot);\n  text-align: left; margin-block: var(--bp-s-2) 0; }\n.bp-blog .wp-block-separator { border: 0; border-top: 1px solid var(--bp-sand); margin-block: var(--bp-s-6); }\n\n\/* --- buttons: two classes so core's own rule cannot win ------------------------ *\/\n.bp-blog .wp-block-buttons { display: flex; justify-content: flex-start; margin-block: 0 var(--bp-s-3); }\n.bp-blog .wp-block-button__link { display: inline-flex; align-items: center; justify-content: center;\n  min-height: 52px; background: var(--bp-teal); color: var(--bp-white); font-size: var(--bp-fs-btn);\n  font-weight: 700; line-height: 1.2; border-radius: var(--bp-radius-btn); padding: 15px 40px;\n  text-decoration: none; transition: background 250ms ease; box-shadow: var(--bp-shadow); }\n.bp-blog .wp-block-button__link:hover { background: var(--bp-green); color: var(--bp-white); }\n\n\/* --- the head: category, title, the meta line, the picture ------------------- *\/\n.bp-blog .bp-blog-eyebrow { font-size: 15px; font-weight: 600; letter-spacing: 0.08em;\n  text-transform: uppercase; margin-block: 0 var(--bp-s-3); }\n.bp-blog .bp-blog-eyebrow a { color: var(--bp-green-aa); text-decoration: none; }\n.bp-blog .bp-blog-eyebrow a:hover { text-decoration: underline; }\n.bp-blog .bp-blog-meta { font-size: var(--bp-fs-small); line-height: 1.6; color: var(--bp-foot);\n  margin-block: 0 var(--bp-s-5); max-width: var(--bp-measure); }\n.bp-blog .bp-blog-meta a { color: var(--bp-foot); }\n\/* A text link is a thumb target of at least 44px (T332b). 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}\n}\n\n\/* --- verified by: exists only for a real, confirmed verifier ------------------- *\/\n.bp-blog .bp-blog-verify { background: var(--bp-white); border: 1px solid var(--bp-sand);\n  border-radius: var(--bp-radius-card); box-shadow: inset 5px 0 0 var(--bp-lime), var(--bp-shadow-soft);\n  padding: var(--bp-s-4) var(--bp-s-5) var(--bp-s-4) var(--bp-s-6); margin-block: 0 var(--bp-s-4); }\n.bp-blog .bp-blog-verify > * { margin-block: 0 var(--bp-s-2); max-width: none; }\n.bp-blog .bp-blog-verify-name { font-size: 18px; font-weight: 700; }\n.bp-blog .bp-blog-verify-cred { font-size: var(--bp-fs-small); color: var(--bp-foot); }\n\/* T332, Jesse 2026-09-17: a SMALL box at the top, under the introduction *\/\n.bp-blog .bp-blog-verify--top { display: grid; grid-template-columns: 56px 1fr; column-gap: 14px;\n  align-items: center; padding: 12px 16px; margin-block: var(--bp-s-3); max-width: var(--bp-prose); }\n.bp-blog .bp-blog-verify--top > * { margin: 0; }\n.bp-blog .bp-blog-verify--top .wp-block-image { grid-row: span 3; 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In 2025 voldeed 46,1 procent van de Nederlandse volwassenen aan die beweegrichtlijnen.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Hoe kan ik een trage stofwisseling versnellen?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"De vetvrije massa verklaarde 63 procent van de variatie in basaalstofwisseling bij 150 volwassenen, en dat zet krachttraining naast je wekelijkse beweging. Zes jaar na een wedstrijd van 30 weken lag de ruststofwisseling nog altijd 704 kcal per dag onder de beginwaarde, dus lang ver onder je behoefte eten is de verkeerde knop.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Is de stofwisselingsscan een test bij een trage stofwisseling?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"De scan scoort de gewoontes op dit gebied, te beginnen bij dertig minuten bewegen op de meeste dagen en elke dag groente of fruit, en geeft je een beginwaarde. 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That matters, because the nutrition advice you keep reading leaves out where the biggest measured differences between people of the same size sit: body composition and daily activity. <a href=\"https:\/\/bioprofile.com\/en\/metabolism-test\/\">The BioProfile metabolism scan<\/a> asks a short series of questions about those habits and gives you an indication of where you stand today, as one of the 11 health areas the full scan assesses. This is not a diagnosis. It is insight into where you stand today. What this scan does not do: point to a cause or make a diagnosis. Only a doctor can do that.<\/p>\n\n\n\n<div class=\"wp-block-group bp-blog-verify bp-blog-verify--top is-layout-flow wp-block-group-is-layout-flow\">\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"800\" height=\"1000\" src=\"https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/09\/rt-portret-justinas-slikas.webp\" alt=\"Portrait of Justinas \u0160likas\" class=\"wp-image-5796\" srcset=\"https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/09\/rt-portret-justinas-slikas.webp 800w, https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/09\/rt-portret-justinas-slikas-240x300.webp 240w, https:\/\/bioprofile.com\/wp-content\/uploads\/2026\/09\/rt-portret-justinas-slikas-768x960.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"bp-blog-verify-name wp-block-paragraph\">Verified by <a href=\"https:\/\/bioprofile.com\/experts\/justinas-slikas\/\">Justinas \u0160likas, PhD<\/a><\/p>\n\n\n\n<p class=\"bp-blog-verify-cred wp-block-paragraph\">PhD in chemistry from the University of Edinburgh<\/p>\n\n\n\n<p class=\"bp-blog-verify-date wp-block-paragraph\">Checked on 30 September 2026<\/p>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group bp-blog-takeaways is-layout-flow wp-block-group-is-layout-flow\">\n\n<h2 class=\"wp-block-heading\">In short<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>The basal metabolic rate does about two thirds of daily energy expenditure, and fat-free mass explained 63 per cent of the difference in basal metabolic rate between 150 adults.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a>,<a href=\"#bronnen\">2<\/a><\/sup><\/li>\n\n\n<li>In 6421 people, total and basal energy expenditure were stable from 20 to 60, with the turning point at 63.0 years.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">3<\/a><\/sup><\/li>\n\n\n<li>Daily movement contributed two thirds of the rise in daily energy expenditure when volunteers were overfed for 8 weeks.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">4<\/a><\/sup><\/li>\n\n\n<li>The scan gives you a starting value for your habits in this area. The scan does not point to a cause and it 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-een-trage-stofwisseling-precies-is\">What a slow metabolism actually is<\/a><\/li>\n\n\n<li><a href=\"#symptomen-trage-stofwisseling-wat-mensen-ermee-bedoelen\">Symptoms of a slow metabolism: what people mean by it<\/a><\/li>\n\n\n<li><a href=\"#hoe-je-het-zou-weten-wat-er-echt-gemeten-wordt\">How you would know: what is actually measured<\/a><\/li>\n\n\n<li><a href=\"#wat-je-dagelijkse-energieverbruik-beweegt\">What moves your daily energy expenditure<\/a><\/li>\n\n\n<li><a href=\"#wanneer-je-contact-opneemt-met-de-huisarts\">When to contact your GP<\/a><\/li>\n\n\n<li><a href=\"#wat-de-stofwisselingsscan-meet\">What the metabolism scan measures<\/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-een-trage-stofwisseling-precies-is\">What a slow metabolism actually is<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Metabolism is not one single button. The basal metabolic rate, the energy your body uses just to keep running, is about two thirds of daily energy expenditure.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> In 150 adults, fat-free mass, so muscles, organs and bones, explained 63 per cent of the differences in basal metabolic rate between people; fat mass explained a further 6 per cent and age 2 per cent, and circulating thyroxine 25 per cent of what was left, only in the male participants. Sex had no significant effect once those three were in the model.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a><\/sup> So the biggest reason one person uses more energy at rest than another of the same size is how much fat-free tissue that person carries.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"symptomen-trage-stofwisseling-wat-mensen-ermee-bedoelen\">Slow metabolism symptoms: what people mean by them<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Feeling cold quickly, gaining weight, being sluggish or tired, hard stools, dry hair, hair loss and dry skin: those are the complaints Thuisarts names for a thyroid that works too slowly, with too little free T4 alongside a raised TSH in the blood.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup> Thuisarts also splits the causes of tiredness into life circumstances, thoughts and feelings, lifestyle such as too little activity and poor sleep, and physical causes including hormonal ones, and adds that when tiredness is the only complaint a blood test almost never turns up a cause.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">6<\/a><\/sup> A list of symptoms tells you it is worth looking. The list does not say what you have.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"hoe-je-het-zou-weten-wat-er-echt-gemeten-wordt\">How you would know: what is actually measured<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A database of 6421 people, from 8 days to 95 years old, from 29 countries and 64 percent female, measured daily energy expenditure with doubly labelled water. Total daily energy expenditure, basal energy expenditure and fat-free mass were stable from 20 to 60, and segmented regression placed the turning point at 63.0 years. After that, daily energy expenditure corrected for body size fell by about 0.7 percent a year, and in people of 90 and older it was about 26 percent below that of middle-aged adults.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">3<\/a><\/sup> The slowdown that people in their thirties use as an explanation cannot yet be seen in the measurements. With age, fat tissue increases and muscle tissue decreases, and that is why the basal metabolism falls at a higher age.\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-dagelijkse-energieverbruik-beweegt\">What moves your daily energy use<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">16 volunteers without obesity were given 1000 kilocalories a day above their maintenance needs for 8 weeks. Two thirds of the rise in total daily energy expenditure came from non-exercise activity thermogenesis: fidgeting, holding your posture, walking around. Differences in that daily movement accounted for a 10-fold difference in fat storage between the volunteers.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">4<\/a><\/sup> So the part of your energy expenditure with the most room in it is the standing, walking and pottering about of an ordinary day.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Health Council of the Netherlands advises adults to do at least two and a half hours of moderately intensive exercise a week, with muscle and bone strengthening activities alongside it.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">7<\/a><\/sup> In 2025, 46.1 per cent of people in the Netherlands aged 18 and over met those physical activity guidelines.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">8<\/a><\/sup> The season moves activity more than the total: in 25 young Dutch adults the physical activity level was 1.87 in summer against 1.76 in winter, while total daily energy expenditure was the same in both seasons.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">9<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Eating far below what you need for a long time works the other way. Of 16 people in a 30-week competition, 14 were measured again after 6 years: the resting metabolic rate was still 704 kcal a day below the starting value, and 41.0 of the 58.3 kg was back.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">10<\/a><\/sup> So a pace you can keep up beats a steep pace.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"wanneer-je-contact-opneemt-met-de-huisarts\">When to contact your GP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Call your GP if the tiredness lasts a long time, for example longer than a month. Also call if other symptoms come with it: night sweats, less appetite, your weight dropping without you trying, a change in your stools or blood in them, being short of breath at rest, a lot of thirst and passing a lot of urine, palpitations, or feeling very low or very tense.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">6<\/a><\/sup> With a thyroid that works too slowly, you contact your GP if the symptoms get worse or come back.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"wat-de-stofwisselingsscan-meet\">What the metabolism scan measures<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The scan asks about the habits under this area, starting with the two simplest: thirty minutes of movement on most days, and vegetables or fruit every day. Your answers become a score for this area with the reading band the score falls in, and higher is better. A questionnaire does not measure resting energy expenditure; that needs indirect calorimetry or doubly labelled water.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">10<\/a>,<a href=\"#bronnen\">3<\/a><\/sup> What the scan gives you is a starting value. It 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\">Most of your daily energy expenditure goes to the basal metabolic rate, and the biggest measured difference between two people of the same size is how much fat-free tissue each one carries.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a>,<a href=\"#bronnen\">2<\/a><\/sup> Daily energy expenditure corrected for body size stayed stable from 20 to about 63.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">3<\/a><\/sup> The symptoms people call a slow metabolism overlap with a thyroid that works too slowly and with ordinary tiredness, and Thuisarts draws the lines for when to call the GP.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a>,<a href=\"#bronnen\">6<\/a><\/sup> The room to move sits in your daily activity and in the weekly minimum the Gezondheidsraad advises.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">4<\/a>,<a href=\"#bronnen\">7<\/a><\/sup> The scan gives you a starting value for your own habits. It is not a diagnosis.<\/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\">A few short questions about your activity and your food, and your score for this area is in your dashboard. What the metabolism scan measures and what the scan is based on is 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\">How do you know whether you have a slow metabolism?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Not from the scales. Resting energy expenditure is measured with indirect calorimetry and daily energy expenditure with doubly labelled water.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">10<\/a>,<a href=\"#bronnen\">3<\/a><\/sup> What you can have checked is the thyroid: in the blood there is too little free T4 alongside a raised TSH when the thyroid works too slowly.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/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 are the symptoms of a slow metabolism?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The complaints Thuisarts lists with a thyroid that works too slowly are feeling cold quickly, gaining weight, being sluggish or tired, hard stools, dry hair, hair loss and dry skin.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup> If tiredness is your only complaint, a blood test almost never turns up a cause.\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\">What can you do about a slow metabolism?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Start with what has been measured. Daily movement contributed two thirds of the rise in daily energy expenditure in volunteers who were overfed,\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">4<\/a><\/sup> and the Health Council of the Netherlands advises adults to do at least two and a half hours of moderately intensive exercise a week plus muscle and bone strengthening activities.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">7<\/a><\/sup> In 2025, 46.1 per cent of Dutch adults met those physical activity guidelines.\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\">How can I speed up a slow metabolism?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fat-free mass explained 63 per cent of the variation in basal metabolic rate in 150 adults, and that puts strength training next to your weekly exercise.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a><\/sup> Six years after a 30-week competition, resting metabolic rate was still 704 kcal a day below the starting value, so eating far below your needs for a long time is the wrong button.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">10<\/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\">Is the metabolism scan a test for a slow metabolism?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The scan scores the habits in this area, starting with thirty minutes of movement on most days and vegetables or fruit every day, and gives you a starting value. The scan does not point to a cause and it 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 (encyclopaedia). <a href=\"https:\/\/www.voedingscentrum.nl\/encyclopedie\/basaalstofwisseling.aspx\">voedingscentrum.nl<\/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;82(5):941-948. <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>Pontzer H, Yamada Y, Sagayama H, et al. Daily energy expenditure through the human life course. Science, 2021;373(6556):808-812. <a href=\"https:\/\/doi.org\/10.1126\/science.abe5017\">doi.org\/10.1126\/science.abe5017<\/a><\/li>\n\n\n<li>Levine JA, Eberhardt NL, Jensen MD. Role of nonexercise activity thermogenesis in resistance to fat gain in humans. Science, 1999;283(5399):212-214. <a href=\"https:\/\/doi.org\/10.1126\/science.283.5399.212\">doi.org\/10.1126\/science.283.5399.212<\/a><\/li>\n\n\n<li>Thuisarts.nl (NHG). Mijn schildklier werkt te langzaam. Last revised 2 February 2026. <a href=\"https:\/\/www.thuisarts.nl\/schildklier-problemen\/mijn-schildklier-werkt-te-langzaam\">thuisarts.nl<\/a><\/li>\n\n\n<li>Thuisarts.nl (NHG). I am tired. What could it be? Last revised 18 April 2023. <a href=\"https:\/\/www.thuisarts.nl\/moeheid\/ik-ben-moe-wat-kan-zijn\">thuisarts.nl<\/a><\/li>\n\n\n<li>Gezondheidsraad. Beweegrichtlijnen 2017. Advice, 22 August 2017. <a href=\"https:\/\/www.gezondheidsraad.nl\/documenten\/2017\/08\/22\/beweegrichtlijnen-2017\">gezondheidsraad.nl<\/a><\/li>\n\n\n<li>RIVM, VZinfo.nl. Bewegen, Volwassenen. Figures from the Gezondheidsenquete \/ Leefstijlmonitor CBS in collaboration with RIVM. Page updated 14 July 2026. <a href=\"https:\/\/www.vzinfo.nl\/bewegen\/volwassenen\">vzinfo.nl<\/a><\/li>\n\n\n<li>Plasqui G, Westerterp KR. Seasonal variation in total energy expenditure and physical activity in Dutch young adults. Obesity Research, 2004;12(4):688-694. <a href=\"https:\/\/doi.org\/10.1038\/oby.2004.80\">doi.org\/10.1038\/oby.2004.80<\/a><\/li>\n\n\n<li>Fothergill E, Guo J, Howard L, et al. Persistent metabolic adaptation 6 years after The Biggest Loser competition. Obesity (Silver Spring), 2016;24(8):1612-1619. <a href=\"https:\/\/doi.org\/10.1002\/oby.21538\">doi.org\/10.1002\/oby.21538<\/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\">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 29 September 2026 \u00b7 Last updated on 29 September 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 a slow metabolism is, which symptoms people mean, what your energy expenditure depends on and what a free metabolism scan measures.<\/p>\n","protected":false},"author":18,"featured_media":6260,"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-6651","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>Slow metabolism: symptoms, causes and what you 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