{"id":6648,"date":"2026-09-29T07:58:00","date_gmt":"2026-09-29T07:58:00","guid":{"rendered":"https:\/\/bioprofile.com\/?p=6648"},"modified":"2026-09-30T19:35:42","modified_gmt":"2026-09-30T19:35:42","slug":"forgetfulness-causes-and-what-a-scan-measures","status":"publish","type":"post","link":"https:\/\/bioprofile.com\/en\/forgetfulness-causes-and-what-a-scan-measures\/","title":{"rendered":"Forgetfulness: where the problem comes from, what the studies measured and when to contact your GP"},"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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That matters, because the reasons studies can point to are usually ordinary reasons you can look at this week. <a href=\"https:\/\/bioprofile.com\/en\/brain-fog-test\/\">The brain health scan from BioProfile<\/a> gives you an indication of where you stand today in this area, as one of the 11 health areas the full scan assesses. This is not a diagnosis. It is self-insight, to see where you stand today and to help you make better choices in your food and the way you live. What this scan does not do: point out a cause. Only a doctor can say what is going on.<\/p>\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>Thuisarts names getting older, stress and big events in your life, a mood disorder that a doctor names, certain medicines and the use of alcohol or drugs as reasons for forgetting things more quickly.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup><\/li>\n\n\n<li>A whole night awake before learning went together with a weaker memory for the new material, taken together across 31 reports with 927 participants (Hedges&#8217; g = 0.621).\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a><\/sup><\/li>\n\n\n<li>In 113 studies with 6,216 participants, stress around learning and stress at the moment of recall both went together with weaker memory.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">3<\/a><\/sup><\/li>\n\n\n<li>A brain health scan scores how much forgetting and difficulty concentrating you are carrying and gives you a baseline. The scan does not point to a cause. 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=\"#oorzaken-van-vergeetachtigheid-waar-de-klacht-vandaan-komt\">Causes of forgetfulness: where the problem comes from<\/a><\/li>\n\n\n<li><a href=\"#slaap-de-reden-met-de-meeste-metingen\">Sleep, the reason with the most measurements<\/a><\/li>\n\n\n<li><a href=\"#stress-en-een-verdeelde-aandacht\">Stress and divided attention<\/a><\/li>\n\n\n<li><a href=\"#ouder-worden-vitamine-b12-en-het-glas-bij-het-eten\">Getting older, vitamin B12 and the glass with your meal<\/a><\/li>\n\n\n<li><a href=\"#bewegen-het-breedste-bewijs\">Exercise, the broadest evidence<\/a><\/li>\n\n\n<li><a href=\"#gewone-vergeetachtigheid-dementie-en-wat-een-scan-meet\">Ordinary forgetfulness, dementia and what a 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=\"oorzaken-van-vergeetachtigheid-waar-de-klacht-vandaan-komt\">Causes of forgetfulness: where the complaint comes from<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Thuisarts.nl names these reasons for forgetting things more quickly: getting older, stress and big events in your life, a mood disorder that a doctor names, certain medicines (sleeping medicines, medicines for mood, medicines for the bladder), and the use of alcohol or drugs.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That list is more about your days than about your brain: you notice the symptoms of forgetfulness yourself, and the reasons sit in your nights, your load and your medicine cabinet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"slaap-de-reden-met-de-meeste-metingen\">Sleep, the reason with the most measurements<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Two meta-analyses put numbers to a lost night: a whole night awake before learning went together with weaker memory for the new material (Hedges&#8217; g = 0.621), and a whole night awake after learning went together with weaker memory for material that had been learned earlier (g = 0.277). The authors point to low statistical power in most of these studies and to signs of publication bias.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So a lost night weakens both the taking in of something new and the holding on to what you learned yesterday.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bad nights are common here: in 2024, more than one in four people in the Netherlands aged 12 and over reported problems with sleeping, 31% of women and 21% of men.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">4<\/a><\/sup><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"stress-en-een-verdeelde-aandacht\">Stress and divided attention<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In 113 studies with 6,216 participants, stress before or during learning went together with weaker memory for that material, and the same held for stress at the moment of recall, more strongly with emotionally charged material.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">3<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On an ordinary day that means a tense morning makes taking something in harder, and recalling it harder too.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Attention counts by the second too. In 80 young adults with an average age of 21.7 years (range 18 to 26), lapses in attention just before recall, measured with EEG alpha power and pupil diameter, went together with forgetting on that attempt, and heavier daily media multitasking went together with more lapses and more forgetting.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So with forgetfulness in young adults, a large part of what feels like a poor memory is attention that was somewhere else. Thuisarts points the same way: do one thing at a time, and write down what you must not forget.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> If your head feels dull rather than forgetful, then <a href=\"https:\/\/bioprofile.com\/en\/brain-fog-what-it-is-and-where-it-comes-from\/\">what brain fog is and where it comes from<\/a> covers that side.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"ouder-worden-vitamine-b12-en-het-glas-bij-het-eten\">Getting older, vitamin B12 and the glass with your meal<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Getting older is on the Thuisarts list, and vitamin B12 is the nutrient named most often with forgetfulness in older people.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> In 2 randomised studies and 6 cohort studies, B12 intake showed no association or mixed associations with thinking ability in older people, and the authors conclude that the evidence is not strong enough to base B12 recommendations on outcomes of thinking.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">6<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So B12 has less evidence behind it than its reputation suggests, while a low status is still worth knowing about. The recommended amount for adults is 2.8 micrograms per day, and the two groups most often low are older people, because stomach acid production falls with age, and vegans, because B12 occurs only in animal products.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">7<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Alcohol is on the same list from Thuisarts.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> In the Dutch Doetinchem Cohort Study, memory was measured twice with five years in between in 2,613 adults aged 43 to 70, and red wine consumption was inversely associated with memory decline (P for trend &lt; 0.01), while other alcoholic drinks showed no association.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">8<\/a><\/sup> One cohort in one place is a signal for further research rather than advice to drink.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"bewegen-het-breedste-bewijs\">Exercise, the broadest evidence<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Across 133 systematic reviews with 2,724 randomised controlled trials and 258,279 participants of all ages taken together, exercise programmes were associated with better memory scores (SMD = 0.26) and better general thinking ability (SMD = 0.42).\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">9<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Those are small to moderate effects across an unusually large body of studies, which makes exercise the habit with the broadest evidence here. De Gezondheidsraad advises adults at least two and a half hours of moderately intensive exercise a week and children at least one hour every day.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">10<\/a><\/sup><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"gewone-vergeetachtigheid-dementie-en-wat-een-scan-meet\">Ordinary forgetfulness, dementia and what a scan measures<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Where ordinary forgetfulness ends and dementia begins is a question for a doctor. Thuisarts gives you the moment to call: contact your GP on a working day if you think your memory is going downhill fast, if the symptoms get in the way of ordinary daily activities, if the symptoms keep getting worse, or if you think your memory problems are bigger than other people&#8217;s.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Those four are about direction and size: which way it is going, and how much of your day the forgetting takes up.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The brain health scan asks a number of questions about the past two weeks and turns your answers into a score with the reading band it falls in. Repeat the scan in two weeks and you have two numbers instead of an impression.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A questionnaire cannot say what the cause of the forgetting is: short nights, a period of stress, a low B12 status, a medicine taken in the evening and a low mood all read the same. So the scan is not a diagnosis. It is self-insight; blood values, your medicines and an examination are the layers a doctor adds.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"samengevat\">In summary<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Forgetfulness usually has ordinary causes: getting older, stress and big events in your life, a low mood, certain medicines, alcohol or drugs.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> Sleep carries the most measurements,\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a><\/sup> bad nights are common here,\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">4<\/a><\/sup> stress acts on both the learning and the recall,\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">3<\/a><\/sup> and in young adults lapses in attention explain a large part of the forgetting.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">5<\/a><\/sup> Vitamin B12 is thinner evidence than its reputation,\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">6<\/a>,<a href=\"#bronnen\">7<\/a><\/sup> red wine was the one drink in the Doetinchem cohort with a smaller decline,\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">8<\/a><\/sup> and exercise carries the broadest evidence.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">9<\/a>,<a href=\"#bronnen\">10<\/a><\/sup> Four signals send you to your GP, and a scan gives you a starting value. 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\">See where you start<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A short set of questions about the past two weeks, and your brain health score is in your dashboard. What the brain health 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\/brain-fog-test\/\">Start the brain health 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 can cause forgetfulness?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Thuisarts names getting older, stress and big events in your life, a mood disorder that a doctor names, certain medicines (sleeping medicines, medicines for mood, medicines for the bladder), and the use of alcohol or drugs.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> Sleep and stress carry the most measurements.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">2<\/a>,<a href=\"#bronnen\">3<\/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 the difference between ordinary forgetfulness and the start of dementia?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A doctor draws that line, and the sources used here give no definitive answer on it. Thuisarts names four reasons to contact your GP about your memory: going downhill quickly, symptoms that get in the way of ordinary daily activities, symptoms that keep getting worse, and the feeling that your memory problems are greater than those of other people.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/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\">Which vitamin deficiency causes forgetfulness?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vitamin B12 is named most often, but B12 has less evidence behind it than its reputation suggests: in 2 randomised trials and 6 cohort studies, intake showed no link or mixed links with thinking ability in older people.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">6<\/a><\/sup> Older people and vegans more often have a low B12 status, and a doctor can measure it.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">7<\/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 first signs of dementia?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The sources used here do not give a list of early signs. What the sources do give are the four signs that are a reason to contact your GP about your memory.\u2060<sup class=\"bp-blog-sup\"><a href=\"#bronnen\">1<\/a><\/sup> A doctor is the one who can say what is going on.<\/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>Thuisarts.nl (NHG). Ik vergeet snel dingen. Accessed 24 September 2026. <a href=\"https:\/\/www.thuisarts.nl\/snel-dingen-vergeten\/ik-vergeet-snel-dingen\">thuisarts.nl<\/a><\/li>\n\n\n<li>Newbury CR, Crowley R, Rastle K, Tamminen J. Sleep deprivation and memory: meta-analytic reviews. Psychological Bulletin, 2021;147(11):1215-1240. <a href=\"https:\/\/doi.org\/10.1037\/bul0000348\">doi.org\/10.1037\/bul0000348<\/a><\/li>\n\n\n<li>Shields GS, Sazma MA, McCullough AM, Yonelinas AP. The Effects of Acute Stress on Episodic Memory: A Meta-Analysis and Integrative Review. Psychological Bulletin, 2017;143(6):636-675. <a href=\"https:\/\/doi.org\/10.1037\/bul0000100\">doi.org\/10.1037\/bul0000100<\/a><\/li>\n\n\n<li>VZinfo.nl (RIVM). Slapen: totale bevolking, figures from the CBS Gezondheidsenqu\u00eate. Accessed 24 September 2026. <a href=\"https:\/\/www.vzinfo.nl\/slapen\/totale-bevolking\">vzinfo.nl<\/a><\/li>\n\n\n<li>Madore KP, Khazenzon AM, Backes CW, Jiang J, Uncapher MR, Norcia AM, Wagner AD. Memory failure predicted by attention lapsing and media multitasking. Nature, 2020;587(7832):87-91. <a href=\"https:\/\/doi.org\/10.1038\/s41586-020-2870-z\">doi.org\/10.1038\/s41586-020-2870-z<\/a><\/li>\n\n\n<li>Doets EL, van Wijngaarden JP, Szczeci\u0144ska A, et al. Vitamin B12 Intake and Status and Cognitive Function in Elderly People. Epidemiologic Reviews, 2013;35(1):2-21. <a href=\"https:\/\/doi.org\/10.1093\/epirev\/mxs003\">doi.org\/10.1093\/epirev\/mxs003<\/a><\/li>\n\n\n<li>Voedingscentrum. Vitamin B12 (cobalamin). Accessed 24 September 2026. <a href=\"https:\/\/www.voedingscentrum.nl\/encyclopedie\/vitamine-b12.aspx\">voedingscentrum.nl<\/a><\/li>\n\n\n<li>Nooyens ACJ, Bueno-de-Mesquita HB, van Gelder BM, van Boxtel MPJ, Verschuren WM. Consumption of alcoholic beverages and cognitive decline at middle age: the Doetinchem Cohort Study. British Journal of Nutrition, 2014;111(4):715-723. <a href=\"https:\/\/doi.org\/10.1017\/S0007114513002845\">doi.org\/10.1017\/S0007114513002845<\/a><\/li>\n\n\n<li>Singh B, Bennett H, Miatke A, et al. Effectiveness of exercise for improving cognition, memory and executive function: a systematic umbrella review and meta-meta-analysis. British Journal of Sports Medicine, 2025;59(12):e108589. <a href=\"https:\/\/doi.org\/10.1136\/bjsports-2024-108589\">doi.org\/10.1136\/bjsports-2024-108589<\/a><\/li>\n\n\n<li>Gezondheidsraad. Beweegrichtlijnen 2017. Advice issued 22 August 2017. <a href=\"https:\/\/www.gezondheidsraad.nl\/documenten\/2017\/08\/22\/beweegrichtlijnen-2017\">gezondheidsraad.nl<\/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\/brain-fog-what-it-is-and-where-it-comes-from\/\">Brain fog: what it is, where it comes from and what a brain scan does and does not measure<\/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 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>Forgetfulness: the reasons Thuisarts names, what research into sleep, stress, attention and vitamin B12 has measured, and when to call your GP.<\/p>\n","protected":false},"author":18,"featured_media":6242,"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":[69],"tags":[],"class_list":["post-6648","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-brain-health-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Forgetfulness: cause, signs and what a scan 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