{"id":74,"date":"2019-08-12T17:44:20","date_gmt":"2019-08-12T21:44:20","guid":{"rendered":"http:\/\/www.nutriiq.ca\/wordpress\/?p=74"},"modified":"2023-05-09T12:26:22","modified_gmt":"2023-05-09T16:26:22","slug":"dietary-sources-of-b-vitamins","status":"publish","type":"post","link":"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-b-vitamins\/","title":{"rendered":"Vitamin B1 (Thiamin): Reference and Dietary Sources"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">On this page<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a02a7754e0b0\" class=\"ez-toc-cssicon-toggle-label\"><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><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a02a7754e0b0\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-b-vitamins\/#Introduction\" >Introduction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-b-vitamins\/#Recommended_Dietary_Allowances_RDAs_for_Thiamin\" >Recommended Dietary Allowances (RDAs) for Thiamin&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-b-vitamins\/#Food_Sources_of_Vitamin_B1\" >Food Sources of Vitamin B1<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-b-vitamins\/#Selected_Food_Sources_of_Thiamin\" >Selected Food Sources of Thiamin<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-b-vitamins\/#References\" >References<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>In this article, we identified Dietary sources of B vitamins (specifically, for Vitamin B1, or Thiamin, these are grains, meat, and fish), provided reference values, and described testing methods, benefits, and toxicity.&nbsp;Nutri-IQ recommends to Wellness Practitioners to check nutritional status with our <a href=\"https:\/\/www.nutriiq.ca\/nutriIQ.php\" target=\"_blank\" rel=\"noreferrer noopener\">Nutritional Balance Assessment Tool<\/a> in order to holistically recognize and close nutritional gaps.<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Abstract<\/h3>\n\n\n\n<p>In this article, we describe:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>the major purposes of this specific nutrient in the human body,&nbsp;<\/li><li>its experimentally confirmed health uses,&nbsp;<\/li><li>conventional ways to estimate nutrient status,<\/li><li>nutrient\u2019s toxicities and deficiencies,<\/li><li>experimentally confirmed and approved levels of the nutrient intake for different demographics,<\/li><li>dietary sources of the nutrient.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Introduction\"><\/span>Introduction<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Thiamin (Vitamin B1) is one of B complex vitamins. It naturally present in some foods, added to some food products, and available as a dietary supplement. This vitamin plays a critical role in energy metabolism and, therefore, in the growth, development, and function of cells.<\/p>\n\n\n\n<p>B Complex vitamins are all water soluble and are not stored very well in the body. Thus, they are needed daily through diet or supplement to support their many functions. Deficiencies of one or more of the B vitamins may occur fairly easily, especially during times of fasting or dieting for weight loss or with diets that include substantial amounts of refined and processed food, sugar, or alcohol. <\/p>\n\n\n\n<p>B complex vitamins are fairly easily digested from food or supplements and then absorbed into the blood, mainly from the small intestine. When the amount of Bs taken exceeds the body\u2019s needs, the excess is easily excreted in the urine, giving it a dark yellow color.&nbsp;<\/p>\n\n\n\n<p>About 80% of the approximately 25\u201330 mg of thiamin in the adult human body is in the form of thiamin diphosphate (TDP; also known as thiamin pyrophosphate), the main metabolically active form of thiamin. Thiamin status is often measured indirectly by assaying the activity of the transketolase enzyme, which depends on TDP, in erythrocyte hemolysates in the presence and absence of added TDP. The result, known as the \u201cTDP effect,\u201d reflects the extent of unsaturation of transketolase with TDP. The result is typically 0%\u201315% in healthy people, 15%\u201325% in those with marginal deficiency, and higher than 25% in people with deficiency.<\/p>\n\n\n\n<p>A very neat tool <a href=\"https:\/\/www.thatheathyheart.com\" target=\"_blank\" rel=\"noreferrer noopener\">Heart <\/a><a href=\"https:\/\/www.nutriiq.ca\/heart.php\" target=\"_blank\" rel=\"noreferrer noopener\">Disease<\/a><a href=\"https:\/\/www.thatheathyheart.com\" target=\"_blank\" rel=\"noreferrer noopener\"> Risk Analysis<\/a> estimates risk of cardiovascular disease by assessment of levels of Vitamins <a href=\"https:\/\/www.nutriiq.ca\/wordpress\/vitamin-a-dietary-sources\/\" target=\"_blank\" rel=\"noreferrer noopener\">A<\/a>, <a href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-vitamin-d\/\" target=\"_blank\" rel=\"noreferrer noopener\">D<\/a>, <a href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-vitamin-e\/\" target=\"_blank\" rel=\"noreferrer noopener\">E<\/a>, <a href=\"https:\/\/www.nutriiq.ca\/wordpress\/vitamin-c-dietary-sources\/\" target=\"_blank\" rel=\"noreferrer noopener\">C,<\/a> <a href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-b-vitamins\/\" target=\"_blank\" rel=\"noreferrer noopener\">B1<\/a>, <a href=\"https:\/\/www.nutriiq.ca\/wordpress\/vitamin-b12-cobalamin-dietary-sources\/\" target=\"_blank\" rel=\"noreferrer noopener\">B12<\/a>, <a href=\"https:\/\/www.nutriiq.ca\/wordpress\/folate-vitamin-b9-dietary-sources\/\" target=\"_blank\" rel=\"noreferrer noopener\">Folate<\/a>, <a href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-magnesium\/\" target=\"_blank\" rel=\"noreferrer noopener\">Magnesium<\/a>, <a href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-potassium\/\" target=\"_blank\" rel=\"noreferrer noopener\">Potassium<\/a>, <a href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-zinc\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zinc<\/a>, and <a href=\"https:\/\/www.nutriiq.ca\/wordpress\/dietary-sources-of-selenium\/\" target=\"_blank\" rel=\"noreferrer noopener\">Selenium<\/a>. One may want to take supplements or change the diet to bring the body back to homeostasis, if it is not too late.<\/p>\n\n\n\n<p>Thiamin toxicity is rare as the body exerts excess amount with urine. People with alcohol dependence; older adults; patients with HIV\/AIDS; people with diabetes; and those who underwent geriatric surgery are at risk for thiamin inadequate status. Thiamin deficiency can be a contributing factor to heart failure and Alzheimer disease.<\/p>\n\n\n\n<p>Thiamin might play a role in: <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Wernicke-Korsakoff encephalopathy syndrome, <\/li><li>Diabetes &nbsp;decreasing glucose levels in patients with type 2 diabetes or impaired glucose tolerance, <\/li><li>Heart failure improving net change in left ventricular ejection fraction, <\/li><li>and Alzheimer\u2019s disease as thiamin deficiency might play a role in the development of it. <\/li><\/ul>\n\n\n\n<p>Assessment of nutritional balance brings<strong> cost-effective immediate answers<\/strong> when your client:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Feels stressed, tired, depressed<\/li><li>Takes prescription meds but cannot alleviate symptoms<\/li><li>Wants to achieve optimal wellness, prevent chronic disease, and manage aging process<\/li><\/ul>\n\n\n\n<p><strong><a href=\"https:\/\/www.nutriiq.ca\">Nutri-IQ<\/a>\u2122 <\/strong>is a unique tool that helps Wellness Professionals to easy and conveniently  identify clients\u2019 <strong>nutritional gaps <\/strong>as possible causes for clients\u2019 complaints.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Recommended_Dietary_Allowances_RDAs_for_Thiamin\"><\/span>Recommended Dietary Allowances (RDAs) for Thiamin&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><td><strong>Age<\/strong><\/td><td><strong>Male<\/strong><\/td><td><strong>Female<\/strong><\/td><td><strong>Pregnancy<\/strong><\/td><td><strong>Lactation<\/strong><\/td><\/tr><\/thead><tbody><tr><td>Birth to 6 months*<\/td><td>0.2 mg<\/td><td>0.2 mg<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>7\u201312 months*<\/td><td>0.3 mg<\/td><td>0.3 mg<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>1\u20133 years<\/td><td>0.5 mg<\/td><td>0.5 mg<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>4\u20138 years<\/td><td>0.6 mg<\/td><td>0.6 mg<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>9\u201313 years<\/td><td>0.9 mg<\/td><td>0.9 mg<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>14\u201318 years<\/td><td>1.2 mg<\/td><td>1.0 mg<\/td><td>1.4 mg<\/td><td>1.4 mg<\/td><\/tr><tr><td>19-50 years<\/td><td>1.2 mg<\/td><td>1.1 mg<\/td><td>1.4 mg<\/td><td>1.4 mg<\/td><\/tr><tr><td>51+ years<\/td><td>1.2 mg<\/td><td>1.1 mg<\/td><td>&nbsp;<\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Food_Sources_of_Vitamin_B1\"><\/span>Food Sources of Vitamin B1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Food sources of thiamin include whole grains, meat, and fish. Breads, cereals, and infant formulas in the United States and many other countries are fortified with thiamin. The most common sources of thiamin in the U.S. diet are cereals and bread. Pork is another major source of the vitamin. Dairy products and most fruits contain little thiamin. About half of the thiamin in the U.S. diet comes from foods that naturally contain thiamin; the remainder comes from foods to which thiamin has been added.<\/p>\n\n\n\n<p>Heating foods containing thiamin can reduce their thiamin content. For example, bread has 20%\u201330% less thiamin than its raw ingredients, and pasteurization reduces thiamin content (which is very small to begin with) in milk by up to 20%. Because thiamin dissolves in water, a significant amount of the vitamin is lost when cooking water is thrown out. Processing also alters thiamin levels in foods; for example, unless white rice is enriched with thiamin, it has one tenth the amount of thiamin in unenriched brown rice.<\/p>\n\n\n\n<p>Some studies do show that thiamin absorption increases when intakes are low.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Selected_Food_Sources_of_Thiamin\"><\/span>Selected Food Sources of Thiamin<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><td><strong>Food<\/strong><\/td><td><strong>Milligrams<br \/>(mg) per<br \/>serving<\/strong><\/td><td><strong>Percent<br \/>DV*<\/strong><\/td><\/tr><\/thead><tbody><tr><td>Fortified white parboiled rice, long grain, \u00bd cup<\/td><td>1.4<\/td><td>117<\/td><\/tr><tr><td>Fortified breakfast cereals, 1 serving<\/td><td>1.5<\/td><td>100<\/td><\/tr><tr><td>Enriched Egg noodles, cooked, 1 cup<\/td><td>0.5<\/td><td>42<\/td><\/tr><tr><td>Broiled pork chop, bone-in, 3 ounces<\/td><td>0.4<\/td><td>33<\/td><\/tr><tr><td>Cooked trout, 3 ounces<\/td><td>0.4<\/td><td>33<\/td><\/tr><tr><td>Black beans, boiled, \u00bd cup<\/td><td>0.4<\/td><td>33<\/td><\/tr><tr><td>English muffin, 1<\/td><td>0.3<\/td><td>25<\/td><\/tr><tr><td>Blue mussels, cooked, 3 ounces<\/td><td>0.3<\/td><td>25<\/td><\/tr><tr><td>Bluefin tuna, 3 ounces<\/td><td>0.2<\/td><td>17<\/td><\/tr><tr><td>Macaroni, whole wheat, cooked, 1 cup<\/td><td>0.2<\/td><td>17<\/td><\/tr><tr><td>Acorn squash, baked, \u00bd cup<\/td><td>0.2<\/td><td>17<\/td><\/tr><tr><td>Brown rice, cooked, \u00bd cup<\/td><td>0.1<\/td><td>8<\/td><\/tr><tr><td>Whole wheat bread, 1 slice<\/td><td>0.1<\/td><td>8<\/td><\/tr><tr><td>Orange juice from concentrate, 1 cup<\/td><td>0.1<\/td><td>8<\/td><\/tr><tr><td>Toasted sunflower seeds, 1 ounce<\/td><td>0.1<\/td><td>8<\/td><\/tr><tr><td>Beef steak, trimmed and braised, 3 ounces<\/td><td>0.1<\/td><td>8<\/td><\/tr><tr><td>Plain yogurt, low fat, 1 cup<\/td><td>0.1<\/td><td>8<\/td><\/tr><tr><td>Oatmeal, cooked with water, \u00bd cup<\/td><td>0.1<\/td><td>8<\/td><\/tr><tr><td>Boiled yellow corn, 1 ear<\/td><td>0.1<\/td><td>8<\/td><\/tr><tr><td>2% Milk, 1 cup<\/td><td>0.1<\/td><td>8<\/td><\/tr><tr><td>Cooked barley, 1 cup<\/td><td>0.1<\/td><td>8<\/td><\/tr><tr><td>Cheddar cheese, 1\u00bd ounces<\/td><td>0<\/td><td>0<\/td><\/tr><tr><td>Roasted chicken, 3 ounces<\/td><td>0<\/td><td>0<\/td><\/tr><tr><td>Sliced Apple, 1 cup<\/td><td>0<\/td><td>0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\"><li>*DV = Daily Value.<\/li><li>The DV for thiamin used here 2 is 1.2 mg for adults and children age 4 years and older. <\/li><li>Foods providing 20% or more of the DV are considered to be high sources of a nutrient, but foods providing lower percentages of the DV also contribute to a healthful diet.<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"References\"><\/span>References<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ol class=\"wp-block-list\"><li>Elson Haas. \u201cStaying Healthy with Nutrition\u201d<\/li><li>U.S. Department of Health &amp; Human Services:&nbsp;<a href=\"https:\/\/ods.od.nih.gov\/factsheets\/Thiamin-HealthProfessional\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/ods.od.nih.gov\/factsheets\/Thiamin-<\/a><a href=\"https:\/\/ods.od.nih.gov\/factsheets\/Thiamin-HealthProfessional\/\">HealthProfessional\/<\/a><\/li><\/ol>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Food sources of thiamin include whole grains, meat, and fish. Breads, cereals, and infant formulas in the United States and many other countries are fortified with thiamin. <\/p>\n","protected":false},"author":1,"featured_media":167,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","_lmt_disableupdate":"no","_lmt_disable":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[29],"tags":[33,17,35,16,36,56,57],"class_list":["post-74","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vitamins","tag-dietary-sources","tag-dietary-sources-of-b-vitamins","tag-dietary-sources-of-thiamin","tag-dietary-sources-of-thiamine-vitamin-b1","tag-dietary-sources-of-vitamin-b1","tag-vitamin-b1-deficiency","tag-vitamin-b1-toxicity"],"aioseo_notices":[],"modified_by":"admin","_links":{"self":[{"href":"https:\/\/www.nutriiq.ca\/wordpress\/wp-json\/wp\/v2\/posts\/74","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nutriiq.ca\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nutriiq.ca\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nutriiq.ca\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nutriiq.ca\/wordpress\/wp-json\/wp\/v2\/comments?post=74"}],"version-history":[{"count":0,"href":"https:\/\/www.nutriiq.ca\/wordpress\/wp-json\/wp\/v2\/posts\/74\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nutriiq.ca\/wordpress\/wp-json\/wp\/v2\/media\/167"}],"wp:attachment":[{"href":"https:\/\/www.nutriiq.ca\/wordpress\/wp-json\/wp\/v2\/media?parent=74"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nutriiq.ca\/wordpress\/wp-json\/wp\/v2\/categories?post=74"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nutriiq.ca\/wordpress\/wp-json\/wp\/v2\/tags?post=74"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}