{"id":63363,"date":"2026-01-10T10:47:39","date_gmt":"2026-01-10T10:47:39","guid":{"rendered":"https:\/\/youzum.net\/americas-new-dietary-guidelines-ignore-decades-of-scientific-research\/"},"modified":"2026-01-10T10:47:39","modified_gmt":"2026-01-10T10:47:39","slug":"americas-new-dietary-guidelines-ignore-decades-of-scientific-research","status":"publish","type":"post","link":"https:\/\/youzum.net\/th\/americas-new-dietary-guidelines-ignore-decades-of-scientific-research\/","title":{"rendered":"America\u2019s new dietary guidelines ignore decades of scientific research"},"content":{"rendered":"<p>The new year has barely begun, but the first days of 2026 have brought big news for health. On Monday, the US\u2019s federal health agency upended its recommendations for routine childhood vaccinations\u2014a move that <a href=\"https:\/\/www.ama-assn.org\/press-center\/ama-press-releases\/ama-statement-changes-childhood-vaccine-schedule\">health<\/a> <a href=\"https:\/\/www.aap.org\/\">associations<\/a> worry puts children at unnecessary risk of preventable disease.<\/p>\n<p>There was more news from the federal government on Wednesday, when health secretary Robert F. Kennedy Jr. and his colleagues at the Departments of Health and Human Services and Agriculture unveiled <a href=\"https:\/\/realfood.gov\/\">new dietary guidelines for Americans<\/a>. And they are causing a bit of a stir.<\/p>\n<p>That\u2019s partly because they recommend products like red meat, butter, and beef tallow\u2014foods that have been linked to cardiovascular disease, and that nutrition experts have been recommending people <em>limit<\/em> in their diets.<\/p>\n<p>These guidelines are a big deal\u2014they influence food assistance programs and school lunches, for example. So this week let\u2019s look at the good, the bad, and the ugly advice being dished up to Americans by their government.<\/p>\n<p>The government dietary guidelines have been around since the 1980s. They are updated every five years, in a process that typically involves a team of nutrition scientists who have combed over scientific research for years. That team will first publish its findings in a scientific report, and, around a year later, the finalized <a href=\"https:\/\/cdn.realfood.gov\/DGA.pdf\">Dietary Guidelines for Americans<\/a> are published.<\/p>\n<p>The <a href=\"https:\/\/odphp.health.gov\/our-work\/nutrition-physical-activity\/dietary-guidelines\/current-dietary-guidelines\">last guidelines<\/a> covered the period 2020 to 2025, and new guidelines were expected in the summer of 2025. Work had already been underway for years; the <a href=\"https:\/\/www.dietaryguidelines.gov\/sites\/default\/files\/2024-12\/Scientific_Report_of_the_2025_Dietary_Guidelines_Advisory_Committee_508c.pdf\">scientific report<\/a> intended to inform them was published back in 2024. But the publication of the guidelines was delayed by last year\u2019s government shutdown, Kennedy <a href=\"https:\/\/edition.cnn.com\/2025\/10\/27\/politics\/dietary-guidelines-release-delay\">said last year<\/a>. They were finally published yesterday.<\/p>\n<p>Nutrition experts had been waiting with bated breath. Nutrition science has evolved slightly over the last five years, and some were expecting to see new recommendations. Research now suggests, for example, that there is <a href=\"https:\/\/www.who.int\/europe\/news\/item\/04-01-2023-no-level-of-alcohol-consumption-is-safe-for-our-health\">no \u201csafe\u201d level of alcohol consumption<\/a>.<\/p>\n<p>We are also beginning to learn more about health risks associated with some ultraprocessed foods (although we still don\u2019t have a good understanding of what they might be, or what even counts as \u201cultraprocessed\u201d.) And some scientists were expecting to see the new guidelines factor in environmental sustainability, says Gabby Headrick, the associate director of food and nutrition policy at George Washington University\u2019s Institute for Food Safety &amp; Nutrition Security in Washington DC.<\/p>\n<p>They didn\u2019t.<\/p>\n<p>Many of the recommendations are sensible. The guidelines recommend a diet rich in whole foods, particularly fresh fruits and vegetables. They recommend avoiding highly processed foods and added sugars. They also highlight the importance of dietary protein, whole grains, and \u201chealthy\u201d fats.<\/p>\n<p>But not all of them are, says Headrick. The guidelines open with a \u201cnew pyramid\u201d of foods. This inverted triangle is topped with \u201cprotein, dairy, and healthy fats\u201d on one side and \u201cvegetables and fruits\u201d on the other.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"2082\" height=\"1171\" src=\"https:\/\/wp.technologyreview.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-180634.png?w=2082\" alt='\"The New Pyramid\" showing an upside-down pyramid shape made of Protein, Dairy&amp; Healthy Fats sharing the top with Vegetables &amp; Fruits with Whole Grains at the bottom tip' class=\"wp-image-1130896\" \/>\n<div class=\"image-credit\">USDA<\/div>\n<\/figure>\n<\/div>\n<p>There are a few problems with this image. For starters, its shape\u2014nutrition scientists have long moved on from the food pyramids of the 1990s, says Headrick. They\u2019re confusing and make it difficult for people to understand what the contents of their plate should look like. That\u2019s why scientists now use an image of a plate to depict a healthy diet.<\/p>\n<p>\u201cWe\u2019ve been using <a href=\"https:\/\/www.center4research.org\/my-plate-dietary-guidelines\/\">MyPlate<\/a> to describe the dietary guidelines in a very consumer-friendly, nutrition-education-friendly way for over the last decade now,\u201d says Headrick. (The UK\u2019s National Health Service takes <a href=\"https:\/\/www.nhs.uk\/live-well\/eat-well\/food-guidelines-and-food-labels\/the-eatwell-guide\/\">a similar approach<\/a>.)<\/p>\n<p>And then there\u2019s the content of that food pyramid. It puts a significant focus on meat and whole-fat dairy produce. The top left image\u2014the one most viewers will probably see first\u2014is of a steak. Smack in the middle of the pyramid is a stick of butter. That\u2019s new. And it\u2019s not a good thing.<\/p>\n<p>While both red meat and whole-fat dairy can certainly form part of a healthy diet, nutrition scientists have long been recommending that most people try to limit their consumption of these foods. Both can be high in saturated fat, which can increase the risk of cardiovascular disease\u2014<a href=\"https:\/\/www.cdc.gov\/nchs\/fastats\/leading-causes-of-death.htm\">the leading cause of death in the US<\/a>. In 2015, on the basis of limited evidence, the World Health Organization <a href=\"https:\/\/www.who.int\/news-room\/questions-and-answers\/item\/cancer-carcinogenicity-of-the-consumption-of-red-meat-and-processed-meat\/\">classified red meat as \u201cprobably carcinogenic to humans.\u201d<\/a>\u00a0<\/p>\n<p>Also concerning is the document\u2019s definition of \u201chealthy fats,\u201d which includes butter and beef tallow (<a href=\"https:\/\/www.wsj.com\/business\/beef-tallow-seed-oils-maha-b60eecb9\">a MAHA favorite<\/a>). Neither food is generally considered to be as healthy as olive oil, for example. While olive oil contains around two grams of saturated fat per tablespoon, a tablespoon of beef tallow has around six grams of saturated fat, and the same amount of butter contains around seven grams of saturated fat, says Headrick.<\/p>\n<p>\u201cI think these are pretty harmful dietary recommendations to be making when we have established that those specific foods likely do not have health-promoting benefits,\u201d she adds.<\/p>\n<p>Red meat is <a href=\"https:\/\/www.technologyreview.com\/2021\/04\/26\/1023636\/sustainable-meat-livestock-production-climate-change\/?utm_source=the_checkup&amp;utm_medium=email&amp;utm_campaign=the_checkup.unpaid.engagement&amp;utm_content=*%7Cdate:m-d-y%7C*\">not exactly a sustainable food<\/a>, and neither are dairy products. And the advice on alcohol is relatively vague, recommending that people \u201cconsume less alcohol for better overall health\u201d (which might leave you wondering: Less than <em>what?<\/em>).<\/p>\n<p>There are other questionable recommendations in the guidelines. Americans are advised to include more protein in their diets\u2014at levels between 1.2 and 1.6 grams daily per kilo of body weight, 50% to 100% more than recommended in previous guidelines. There\u2019s a risk that increasing protein consumption to such levels could raise a person\u2019s intake of both calories and saturated fats to unhealthy levels, says Jos\u00e9 Ordov\u00e1s, a senior nutrition scientist at Tufts University. \u201cI would err on the low side,\u201d he says.<\/p>\n<p>Some nutrition scientists are questioning why these changes have been made. It\u2019s not as though the new recommendations were in the 2024 scientific report. And the evidence on red meat and saturated fat hasn\u2019t changed, says Headrick.<\/p>\n<p>In reporting this piece, I contacted many contributors to the previous guidelines, and some who had led research for 2024\u2019s scientific report. None of them agreed to comment on the new guidelines on the record. Some seemed disgruntled. One merely told me that the process by which the new guidelines had been created was \u201copaque.\u201d<\/p>\n<p>\u201cThese people invested a lot of their time, and they did a thorough job [over] a couple of years, identifying [relevant scientific studies],\u201d says Ordov\u00e1s. \u201cI\u2019m not surprised that when they see that [their] work was ignored and replaced with something [put together] quickly, that they feel a little bit disappointed,\u201d he says.<\/p>\n<p><em>This article first appeared in The Checkup,\u00a0<\/em>MIT Technology Review\u2019s<em>\u00a0weekly biotech newsletter. To receive it in your inbox every Thursday, and read articles like this first,\u00a0<\/em><a href=\"https:\/\/forms.technologyreview.com\/newsletters\/biotech-the-checkup\/?_ga=2.241810882.15113993.1664981064-43237434.1647441349\"><em>sign up here<\/em><\/a><em>.<\/em><\/p>","protected":false},"excerpt":{"rendered":"<p>The new year has barely begun, but the first days of 2026 have brought big news for health. On Monday, the US\u2019s federal health agency upended its recommendations for routine childhood vaccinations\u2014a move that health associations worry puts children at unnecessary risk of preventable disease. There was more news from the federal government on Wednesday, when health secretary Robert F. Kennedy Jr. and his colleagues at the Departments of Health and Human Services and Agriculture unveiled new dietary guidelines for Americans. And they are causing a bit of a stir. That\u2019s partly because they recommend products like red meat, butter, and beef tallow\u2014foods that have been linked to cardiovascular disease, and that nutrition experts have been recommending people limit in their diets. These guidelines are a big deal\u2014they influence food assistance programs and school lunches, for example. So this week let\u2019s look at the good, the bad, and the ugly advice being dished up to Americans by their government. The government dietary guidelines have been around since the 1980s. They are updated every five years, in a process that typically involves a team of nutrition scientists who have combed over scientific research for years. That team will first publish its findings in a scientific report, and, around a year later, the finalized Dietary Guidelines for Americans are published. The last guidelines covered the period 2020 to 2025, and new guidelines were expected in the summer of 2025. Work had already been underway for years; the scientific report intended to inform them was published back in 2024. But the publication of the guidelines was delayed by last year\u2019s government shutdown, Kennedy said last year. They were finally published yesterday. Nutrition experts had been waiting with bated breath. Nutrition science has evolved slightly over the last five years, and some were expecting to see new recommendations. Research now suggests, for example, that there is no \u201csafe\u201d level of alcohol consumption. We are also beginning to learn more about health risks associated with some ultraprocessed foods (although we still don\u2019t have a good understanding of what they might be, or what even counts as \u201cultraprocessed\u201d.) And some scientists were expecting to see the new guidelines factor in environmental sustainability, says Gabby Headrick, the associate director of food and nutrition policy at George Washington University\u2019s Institute for Food Safety &amp; Nutrition Security in Washington DC. They didn\u2019t. Many of the recommendations are sensible. The guidelines recommend a diet rich in whole foods, particularly fresh fruits and vegetables. They recommend avoiding highly processed foods and added sugars. They also highlight the importance of dietary protein, whole grains, and \u201chealthy\u201d fats. But not all of them are, says Headrick. The guidelines open with a \u201cnew pyramid\u201d of foods. This inverted triangle is topped with \u201cprotein, dairy, and healthy fats\u201d on one side and \u201cvegetables and fruits\u201d on the other. USDA There are a few problems with this image. For starters, its shape\u2014nutrition scientists have long moved on from the food pyramids of the 1990s, says Headrick. They\u2019re confusing and make it difficult for people to understand what the contents of their plate should look like. That\u2019s why scientists now use an image of a plate to depict a healthy diet. \u201cWe\u2019ve been using MyPlate to describe the dietary guidelines in a very consumer-friendly, nutrition-education-friendly way for over the last decade now,\u201d says Headrick. (The UK\u2019s National Health Service takes a similar approach.) And then there\u2019s the content of that food pyramid. It puts a significant focus on meat and whole-fat dairy produce. The top left image\u2014the one most viewers will probably see first\u2014is of a steak. Smack in the middle of the pyramid is a stick of butter. That\u2019s new. And it\u2019s not a good thing. While both red meat and whole-fat dairy can certainly form part of a healthy diet, nutrition scientists have long been recommending that most people try to limit their consumption of these foods. Both can be high in saturated fat, which can increase the risk of cardiovascular disease\u2014the leading cause of death in the US. In 2015, on the basis of limited evidence, the World Health Organization classified red meat as \u201cprobably carcinogenic to humans.\u201d\u00a0 Also concerning is the document\u2019s definition of \u201chealthy fats,\u201d which includes butter and beef tallow (a MAHA favorite). Neither food is generally considered to be as healthy as olive oil, for example. While olive oil contains around two grams of saturated fat per tablespoon, a tablespoon of beef tallow has around six grams of saturated fat, and the same amount of butter contains around seven grams of saturated fat, says Headrick. \u201cI think these are pretty harmful dietary recommendations to be making when we have established that those specific foods likely do not have health-promoting benefits,\u201d she adds. Red meat is not exactly a sustainable food, and neither are dairy products. And the advice on alcohol is relatively vague, recommending that people \u201cconsume less alcohol for better overall health\u201d (which might leave you wondering: Less than what?). There are other questionable recommendations in the guidelines. Americans are advised to include more protein in their diets\u2014at levels between 1.2 and 1.6 grams daily per kilo of body weight, 50% to 100% more than recommended in previous guidelines. There\u2019s a risk that increasing protein consumption to such levels could raise a person\u2019s intake of both calories and saturated fats to unhealthy levels, says Jos\u00e9 Ordov\u00e1s, a senior nutrition scientist at Tufts University. \u201cI would err on the low side,\u201d he says. Some nutrition scientists are questioning why these changes have been made. It\u2019s not as though the new recommendations were in the 2024 scientific report. And the evidence on red meat and saturated fat hasn\u2019t changed, says Headrick. In reporting this piece, I contacted many contributors to the previous guidelines, and some who had led research for 2024\u2019s scientific report. None of them agreed to comment on the new guidelines on the record. Some seemed disgruntled. One merely told me that the process by which the new<\/p>","protected":false},"author":2,"featured_media":63364,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pmpro_default_level":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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NU","author_link":"https:\/\/youzum.net\/th\/members\/adminnu\/"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/youzum.net\/th\/category\/ai-club\/\" rel=\"category tag\">AI<\/a> <a href=\"https:\/\/youzum.net\/th\/category\/committee\/\" rel=\"category tag\">Committee<\/a> <a href=\"https:\/\/youzum.net\/th\/category\/news\/\" rel=\"category tag\">News<\/a> <a href=\"https:\/\/youzum.net\/th\/category\/uncategorized\/\" rel=\"category tag\">Uncategorized<\/a>","rttpg_excerpt":"The new year has barely begun, but the first days of 2026 have brought big news for health. 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