{"id":798787,"date":"2024-01-20T12:48:37","date_gmt":"2024-01-20T12:48:37","guid":{"rendered":"https:\/\/myvitalmetrics.com\/blog-lose-fat-with-a-dexa-scan-for-body-fat-copy\/"},"modified":"2025-06-27T13:25:45","modified_gmt":"2025-06-27T12:25:45","slug":"blog-are-your-dexa-body-fat-results-right","status":"publish","type":"post","link":"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/","title":{"rendered":"Are Your DEXA Body Fat Results Right?"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div><p>[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;Section&#8221; _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; collapsed=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row admin_label=&#8221;Row&#8221; _builder_version=&#8221;4.22.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text ul_item_indent=&#8221;50px&#8221; admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; text_font=&#8221;Open Sans||||||||&#8221; link_font=&#8221;|600|||||||&#8221; ul_text_align=&#8221;left&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<\/p>\n<p><span style=\"font-weight: 300;\">If you\u2019ve had a <\/span><a href=\"https:\/\/myvitalmetrics.com\/services\/dexa\/\"><span style=\"font-weight: 300;\">DEXA scan<\/span><\/a><span style=\"font-weight: 300;\">, or are considering getting one, can you be sure that that it&#8217;s giving you an accurate body fat percentage? Are your DEXA body fat results right?<\/span><\/p>\n<p><span style=\"font-weight: 300;\">A DEXA scan is the gold standard in body composition analysis, and an incredibly accurate way of measuring your body fat percentage \u2013 so, it\u2019d be easy to assume that all DEXA scans are made equal. Unfortunately, this isn\u2019t the case, and the way a DEXA machine is calibrated can affect your body fat percentage results by upwards of 5%.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">In this article, we\u2019ll take a look at why this difference in measurement happens, and how you can ensure you get the accuracy you deserve from your scan and ensure your DEXA body fat results are right. Along the way, we\u2019ll also answer some FAQs about DEXA accuracy, including whether a DEXA scan can be wrong, <\/span><a href=\"https:\/\/myvitalmetrics.com\/blog-what-does-a-body-composition-scan-show\/\"><span style=\"font-weight: 300;\">what a DEXA scan can show you<\/span><\/a><span style=\"font-weight: 300;\">, and much more.<\/span><\/p>\n<p><span style=\"font-weight: 300;\">Want to check your DEXA body composition results right away? Use our <a href=\"https:\/\/myvitalmetrics.com\/calculators-nhanes\/\">NHANES DEXA calculator<\/a>.\u00a0\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_is_a_DEXA_scan\"><\/span><span style=\"font-weight: 500;\">What is a DEXA scan?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#What_is_a_DEXA_scan\" >What is a DEXA scan?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#How_accurate_is_a_DEXA_scan\" >How accurate is a DEXA scan?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#What_can_a_DEXA_scan_show_me\" >What can a DEXA scan show me?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#Is_a_DEXA_scan_better_than_a_body_fat_scan\" >Is a DEXA scan better than a body fat scan?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#Are_all_DEXA_scans_created_equal\" >Are all DEXA scans created equal?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#Are_DEXA_scans_ever_wrong\" >Are DEXA scans ever wrong?<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#What_is_the_NHANES_DEXA_calibration\" >What is the NHANES DEXA calibration?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#Why_is_the_NHANES_calibration_problematic\" >Why is the NHANES calibration problematic?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#Can_a_DEXA_scan_overestimate_body_fat\" >Can a DEXA scan overestimate body fat?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#Which_calibration_is_more_accurate\" >Which calibration is more accurate?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#If_this_calibration_isnt_accurate_why_are_DEXA_services_still_using_it\" >If this calibration isn\u2019t accurate, why are DEXA services still using it?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#Ive_had_a_DEXA_scan_%E2%80%93_how_do_I_know_if_my_body_fat_results_were_right\" >I\u2019ve had a DEXA scan \u2013 how do I know if my body fat results were right?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#Ive_had_a_NHANES_DEXA_%E2%80%93_how_can_I_find_out_my_real_body_fat\" >I\u2019ve had a NHANES DEXA \u2013 how can I find out my real body fat?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#How_do_I_know_if_a_DEXA_provider_uses_NHANES\" >How do I know if a DEXA provider uses NHANES?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/myvitalmetrics.com\/blog-are-your-dexa-body-fat-results-right\/#Curious_about_your_real_body_fat_percentage_Book_a_DEXA_scan_at_My_Vital_Metrics\" >Curious about your real body fat percentage? Book a DEXA scan at My Vital Metrics<\/a><\/li><\/ul><\/nav><\/div>\n\n<p><span style=\"font-weight: 300;\">A <\/span><a href=\"https:\/\/myvitalmetrics.com\/services\/dexa\/\"><span style=\"font-weight: 300;\">DEXA scan<\/span><\/a><span style=\"font-weight: 300;\"> is the gold-standard test for body composition analysis, body fat measurement, and bone density analysis.<\/span><\/p>\n<p><span style=\"font-weight: 300;\">DEXA stands for dual-energy X-ray absorptiometry \u2013 named after the method by which the scan works, using two low-level X-ray beams to create a high-resolution image of your body composition.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">A DEXA scan can accurately measure your body fat percentage, lean mass, visceral fat, and bone density. This has a range of benefits, from helping determine your caloric needs based on your body composition, to identifying muscular imbalances, tracking progress throughout a training program, or <\/span><a href=\"https:\/\/myvitalmetrics.com\/blog-lose-fat-with-a-dexa-scan-for-body-fat\/\"><span style=\"font-weight: 300;\">facilitating fat loss or body recomposition<\/span><\/a><span style=\"font-weight: 300;\">.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_accurate_is_a_DEXA_scan\"><\/span><span style=\"font-weight: 500;\">How accurate is a DEXA scan?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 300;\">A DEXA scan is incredibly accurate, with an error rate of approximately 1%. This is substantially more accurate than other measures of body fat \u2013 such as bioelectrical impedance analysis and skinfold measures \u2013 which can have an <\/span><a href=\"https:\/\/www.mysportscience.com\/post\/body-composition-methods-validity-and-reliability\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 300;\">error rate of up to 3-5%<\/span><\/a><\/p>\n<p><span style=\"font-weight: 300;\">However, the accuracy of a DEXA scan can be affected by:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Improper DEXA calibration<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Errors from movement during the scan<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Errors from improper positioning on the DEXA table<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Hydration level and food intake\u00a0\u00a0<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 300;\">With proper set-up and an experienced technician, a DEXA scan is an incredibly accurate method of measuring your body composition.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_can_a_DEXA_scan_show_me\"><\/span><span style=\"font-weight: 500;\">What can a DEXA scan show me?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 300;\">A DEXA scan can give you an in-depth assessment of your body composition and bone health. A DEXA scan report will show you your:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Body fat mass<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Body fat distribution<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Body fat percentage<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Lean mass<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Muscle distribution<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Bone mineral concentration (BMC)<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Bone mineral density (BMD)<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">Visceral adipose tissue (VAT) \u2013 a measure of visceral fat<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 300;\">You can read a detailed breakdown of the different DEXA scan metrics in our blog: <\/span><a href=\"https:\/\/myvitalmetrics.com\/blog-what-does-a-body-composition-scan-show\/\"><span style=\"font-weight: 300;\">What Does a Body Composition Scan Show?<\/span><\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_a_DEXA_scan_better_than_a_body_fat_scan\"><\/span><span style=\"font-weight: 500;\">Is a DEXA scan better than a body fat scan?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 300;\">A DEXA scan is more accurate, precise, and reliable than other forms of body fat scan such as <\/span><a href=\"https:\/\/myvitalmetrics.com\/blog-how-accurate-are-body-fat-scales\/\"><span style=\"font-weight: 300;\">smart body fat scales<\/span><\/a><span style=\"font-weight: 300;\"> and other types of bioelectrical impedance analysis (BIA)-enabled devices. This is particularly true for certain body composition metrics, such as body fat percentage.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">BIA-enabled body fat scans do not measure your body fat directly. Rather, they measure an estimate of your lean mass, and then \u2013 based on demographic information such as your age, weight, and height \u2013 generate an estimate of your body fat percentage.\u00a0\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">A DEXA scan, on the other hand, measures your body fat directly, giving you a more accurate result. Additionally, a DEXA scan can measure your level of visceral fat \u2013 something that isn\u2019t possible with other types of body fat scans.\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Are_all_DEXA_scans_created_equal\"><\/span><span style=\"font-weight: 500;\">Are all DEXA scans created equal?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 300;\">If you\u2019re interested in getting a DEXA scan \u2013 or already have your results \u2013 you might be wondering whether you can trust the accuracy of your scan. Largely, the answer is yes. However, there are multiple calibration methods for a DEXA machine \u2013 and one of these is vastly more accurate than the other. Let\u2019s take a look at this in more detail.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Are_DEXA_scans_ever_wrong\"><\/span><span style=\"font-weight: 500;\">Are DEXA scans ever wrong?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 300;\">While DEXA scans are highly accurate, a DEXA scanner can be calibrated in such a way that distorts your results.\u00a0\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">To understand this, we need to take a look at the way a DEXA machine is calibrated. There are two calibration models for a DEXA machine: the classic calibration, and the NHANES calibration.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">What\u2019s the difference?\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">The classic DEXA calibration is the default setting for DEXA machines. <\/span><a href=\"https:\/\/hologiced.com\/wp-content\/uploads\/2020\/09\/Hologics-approach-to-calibration-for-body-comp_Kelly.pdf\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 300;\">Hologic<\/span><\/a><span style=\"font-weight: 300;\">, the manufacturer of the DEXA, writes:\u00a0\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">\u201cEach Hologic DXA system is calibrated to the highest possible accuracy and shipped with a unique serialized phantom. This phantom and the internal Dynamic Calibration\u2122 system ensure exceptional short- and long-term precision as well as the most accurate 3-compartment analysis of body composition available today.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 300;\">So, if the classic calibration can guarantee the highest possible accuracy, what\u2019s the NHANES calibration?<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"What_is_the_NHANES_DEXA_calibration\"><\/span><span style=\"font-weight: 500;\">What is the NHANES DEXA calibration?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 300;\">The NHANES DEXA calibration was originally introduced in 2005. When the DEXA was picked as the chosen body composition measure for the US-wide National Health and Nutrition Examination Survey (NHANES) study, researchers needed to ensure that all the DEXA scanners used were calibrated identically. A <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/15883424\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 300;\">small study<\/span><\/a><span style=\"font-weight: 300;\"> drawing on 7 datasets concluded that the DEXA overestimated lean mass.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">The solution? <\/span><\/p>\n<p><span style=\"font-weight: 300;\">The NHANES calibration, which auto-adjusted DEXA results to compensate for the alleged overestimation. What this looked like in practice was decreasing DEXA lean mass results by 5.6%, and adding this mass to the fat mass. This resulted in significantly higher body fat mass and body fat percentages than under the unadjusted DEXA calibration. The NHANES study accepted this adjusted calibration, and \u2013 given the size and scale of the study \u2013 in turn became the default DEXA calibration setting.\u00a0<\/span><\/p>\n<h4><span class=\"ez-toc-section\" id=\"Why_is_the_NHANES_calibration_problematic\"><\/span><span style=\"font-weight: 500;\">Why is the NHANES calibration problematic?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><span style=\"font-weight: 300;\">The NHANES calibration was problematic for two key reasons:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">The methodology by which it came about<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><span style=\"font-weight: 300;\">The potentially harmful effects of a false body fat reading<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 300;\">Let\u2019s consider each of these in turn.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">Firstly, the NHANES calibration was based on a small pilot study. This study compared DEXA results to the results of two other body composition measures: deuterium dilution and hydrostatic weighing. This was problematic as there was extensive existing research to suggest that both of these measures were less accurate than a DEXA scan \u2013 not more. Therefore, the process of modifying the DEXA results (by creating the NHANES calibration) was done to match DEXA results to <\/span><i><span style=\"font-weight: 300;\">less <\/span><\/i><span style=\"font-weight: 300;\">accurate body composition measures.<\/span><\/p>\n<p><span style=\"font-weight: 300;\">Secondly, the NHANES calibration consistently overestimates body fat mass and body fat percentage. This has the potential for harm \u2013 if a DEXA recipient acts on the assumption that their body fat is 5% higher than it actually is, they risk dropping into a dangerously low body fat percentage \u2013 while being entirely unaware of it.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">The 5% by which the NHANES calibration increases body fat percentage is a considerable difference. For example, a man with a body fat percentage of 18% (a healthy body fat percentage for his sex) would receive a body fat percentage of 23% (an unhealthy body fat percentage for his sex) from a DEXA with the NHANES calibration. <\/span><\/p>\n<p><span style=\"font-weight: 300;\">The recommendations that would be made based on this body fat reading would be entirely different to those made based on his <\/span><i><span style=\"font-weight: 300;\">actual <\/span><\/i><span style=\"font-weight: 300;\">body fat reading \u2013 and would likely be inappropriate based on his real results.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_a_DEXA_scan_overestimate_body_fat\"><\/span><span style=\"font-weight: 500;\">Can a DEXA scan overestimate body fat?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 300;\">The NHANES DEXA calibration has been shown to overestimate body fat percentage by upwards of 5% \u2013 and this overestimation is particularly prevalent in individuals with high lean body mass. To avoid this overestimation, we would recommend receiving a DEXA scan from a DEXA service that uses the classic, unadjusted DEXA calibration.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Which_calibration_is_more_accurate\"><\/span><span style=\"font-weight: 500;\">Which calibration is more accurate?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 300;\">As of 2020, Hologic returned their DEXA machines to the classic calibration. This was based on research that compared the classic calibration, the NHANES calibration, and the Lohman four-compartment model \u2013 in addition to other measures of body composition.<\/span><\/p>\n<p><span style=\"font-weight: 300;\"> As you can see from the graph below (source: \u201c<a href=\"https:\/\/hologiced.com\/wp-content\/uploads\/2020\/09\/Hologics-approach-to-calibration-for-body-comp_Kelly.pdf\" target=\"_blank\" rel=\"noopener\">The Body Composition Gold Standard<\/a>\u201d), the NHANES calibration showed the lowest level of correlation with the Lohman 4C model, and the NHANES calibration consistently overestimated body fat percentage \u2013 particularly in individuals with an overall lower body fat percentage. This makes the question of calibration choice of particular importance for individuals with a high lean body mass. <\/span><\/p>\n<p>[\/et_pb_text][et_pb_image src=&#8221;https:\/\/myvitalmetrics.com\/wp-content\/uploads\/2024\/01\/Screenshot-2024-01-20-at-12.54.54.png&#8221; alt=&#8221;Linear graph of body fat percentage for several body composition measurement methods. The graph is taken from %22The Body Composition Gold Standard:<br \/>\nHologic\u2019s approach to calibration for body<br \/>\ncomposition measurements using DXA%22.&#8221; title_text=&#8221;Screenshot 2024-01-20 at 12.54.54&#8243; _builder_version=&#8221;4.24.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.24.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h3><span class=\"ez-toc-section\" id=\"If_this_calibration_isnt_accurate_why_are_DEXA_services_still_using_it\"><\/span><span style=\"font-weight: 500;\">If this calibration isn\u2019t accurate, why are DEXA services still using it?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 300;\">The guidance given by Hologic \u2013 the DEXA manufacturer \u2013 states that if you have an existing research study in progress using the NHANES calibration, then you may want to continue using the NHANES calibration for the duration of the study. This helps to maintain consistency in DEXA scan results for the purposes of the study.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">However, using the NHANES calibration can be misleading if DEXA scan recipients <\/span><i><span style=\"font-weight: 300;\">aren\u2019t aware <\/span><\/i><span style=\"font-weight: 300;\">it is being used. This can lead to misinformation (inaccurate body fat results), misunderstanding (about what a given body fat percentage looks like in reality), and even harm (if actions are taken based on a false body fat percentage).\u00a0\u00a0\u00a0\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ive_had_a_DEXA_scan_%E2%80%93_how_do_I_know_if_my_body_fat_results_were_right\"><\/span><span style=\"font-weight: 500;\">I\u2019ve had a DEXA scan \u2013 how do I know if my body fat results were right?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 300;\">To check if the DEXA scan you received used the NHANES calibration, you can check your DEXA report.<\/span><\/p>\n<p>[\/et_pb_text][et_pb_image src=&#8221;https:\/\/myvitalmetrics.com\/wp-content\/uploads\/2024\/01\/Screenshot-2024-01-19-at-14.40.48-1.png&#8221; alt=&#8221;The chart shows example DEXA body composition results taken from a DEXA machine using the NHANES calibration. There is a red circle around the %22NHANES BCA%22 tag that indicates the calibration type.&#8221; title_text=&#8221;NHANES_TAG&#8221; _builder_version=&#8221;4.24.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.24.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p><span style=\"font-weight: 300;\">A DEXA that uses the NHANES calibration will show the tag \u201cNHANES BCA\u201d at the bottom, as shown in the image below. If you don\u2019t see this tag, then your DEXA scan did not use the NHANES calibration.\u00a0\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ive_had_a_NHANES_DEXA_%E2%80%93_how_can_I_find_out_my_real_body_fat\"><\/span><span style=\"font-weight: 500;\">I\u2019ve had a NHANES DEXA \u2013 how can I find out my real body fat?\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 300;\">If you\u2019ve already had a DEXA scan, and you\u2019re realising that the NHANES calibration was used \u2013 don\u2019t worry, all isn\u2019t lost!<\/span><\/p>\n<p><span style=\"font-weight: 300;\">You can convert your existing NHANES DEXA results to classic DEXA results by using our <\/span><a href=\"https:\/\/myvitalmetrics.com\/why-mattdoesfitness-is-definitely-leaner-than-16-9-bodyfat-according-to-a-dexa-scan\/\"><span style=\"font-weight: 300;\">NHANES DEXA conversion calculator<\/span><\/a><span style=\"font-weight: 300;\"> (scroll to the bottom of the page to view).<\/span><\/p>\n<p><span style=\"font-weight: 300;\">Simply input your weight (g), lean mass (g), and fat mass (g) as recorded by the NHANES DEXA, and our conversion calculator will calculate both your NHANES body fat percentage and your unadjusted body fat percentage.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">If you\u2019d like to re-measure and set a new baseline for your body fat percentage based on the classic, unadjusted DEXA calibration, then you can <\/span><a href=\"https:\/\/myvitalmetrics.com\/services\/dexa\/\"><span style=\"font-weight: 300;\">schedule a DEXA scan at My Vita Metrics<\/span><\/a><span style=\"font-weight: 300;\">.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_do_I_know_if_a_DEXA_provider_uses_NHANES\"><\/span><span style=\"font-weight: 500;\">How do I know if a DEXA provider uses NHANES?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 300;\">Often, a DEXA provider won\u2019t advertise the calibration they use for their body composition scans. However, you can always ask! If this doesn\u2019t get you the information you\u2019re looking for, you might want to try asking for a sample DEXA report. This will show you the type of data that you can expect from your DEXA scan, as well as display the \u201cNHANES\u201d tag if this is the calibration that was used.\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Curious_about_your_real_body_fat_percentage_Book_a_DEXA_scan_at_My_Vital_Metrics\"><\/span><span style=\"font-weight: 500;\">Curious about your real body fat percentage? Book a DEXA scan at My Vital Metrics<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 300;\">If you want absolute certainty that your DEXA scan measures your body fat percentage using the classic calibration, you can <\/span><a href=\"https:\/\/myvitalmetrics.com\/services\/dexa\/\"><span style=\"font-weight: 300;\">book your DEXA scan<\/span><\/a><span style=\"font-weight: 300;\"> with My Vital Metrics.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 300;\">In addition to using the classic calibration, My Vital Metrics is the only publicly available facility in the UK that not only uses the classic calibrates its DEXA using a \u201cwhole body phantom\u201d \u2013 an incredibly accurate method of calibration that is typically reserved for research facilities. If you get a follow-up scan at My Vital Metrics, you can be sure of the precision and replicability of your results \u2013 any change in your body fat percentage is down to your hard work, not our machine!<\/span><\/p>\n<p><span style=\"font-weight: 300;\">To find out more, book a free fitness consultation, or schedule your DEXA scan, <\/span><a href=\"https:\/\/myvitalmetrics.com\/\"><span style=\"font-weight: 300;\">reach out to the team at My VItal Metrics<\/span><\/a><span style=\"font-weight: 300;\"> today!<\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you\u2019ve had a DEXA scan, or are considering getting one, can you be sure that that it&#8217;s giving you an accurate body fat percentage? Are your DEXA body fat results right? A DEXA scan is the gold standard in body composition analysis, and an incredibly accurate way of measuring your body fat percentage \u2013 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":798793,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[38,12,32,59],"tags":[],"class_list":["post-798787","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-body-comp","category-dexa","category-fitlife","category-health-and-fitness-testing"],"_links":{"self":[{"href":"https:\/\/myvitalmetrics.com\/wp-json\/wp\/v2\/posts\/798787","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/myvitalmetrics.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/myvitalmetrics.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/myvitalmetrics.com\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/myvitalmetrics.com\/wp-json\/wp\/v2\/comments?post=798787"}],"version-history":[{"count":1,"href":"https:\/\/myvitalmetrics.com\/wp-json\/wp\/v2\/posts\/798787\/revisions"}],"predecessor-version":[{"id":806254,"href":"https:\/\/myvitalmetrics.com\/wp-json\/wp\/v2\/posts\/798787\/revisions\/806254"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/myvitalmetrics.com\/wp-json\/wp\/v2\/media\/798793"}],"wp:attachment":[{"href":"https:\/\/myvitalmetrics.com\/wp-json\/wp\/v2\/media?parent=798787"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/myvitalmetrics.com\/wp-json\/wp\/v2\/categories?post=798787"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/myvitalmetrics.com\/wp-json\/wp\/v2\/tags?post=798787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}