{"id":11420143,"date":"2026-10-21T19:18:28","date_gmt":"2026-10-21T16:18:28","guid":{"rendered":"https:\/\/nostylelike.net\/high-homocysteine\/"},"modified":"2026-10-21T20:04:06","modified_gmt":"2026-10-21T17:04:06","slug":"high-homocysteine","status":"publish","type":"post","link":"https:\/\/nostylelike.net\/en\/high-homocysteine\/","title":{"rendered":"High Homocysteine: 7 Causes, Testing and the Role of B Vitamins and TMG"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 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\" style=\"cursor:inherit\">Table of 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 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#What_Does_High_Homocysteine_Mean\" >What Does High Homocysteine Mean?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#How_Homocysteine_Is_Recycled\" >How Homocysteine Is Recycled<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#7_Common_Causes_of_High_Homocysteine\" >7 Common Causes of High Homocysteine<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#Testing_for_High_Homocysteine\" >Testing for High Homocysteine<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#B_Vitamins_TMG_and_High_Homocysteine\" >B Vitamins, TMG and High Homocysteine<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#Does_Lowering_High_Homocysteine_Prevent_Heart_Attacks\" >Does Lowering High Homocysteine Prevent Heart Attacks?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#Other_Heart_Supplements_and_Where_They_Fit\" >Other Heart Supplements and Where They Fit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#Frequently_Asked_Questions_About_High_Homocysteine\" >Frequently Asked Questions About High Homocysteine<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#Should_everyone_test_their_homocysteine\" >Should everyone test their homocysteine?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#Do_I_need_methylfolate_if_I_have_an_MTHFR_variant\" >Do I need methylfolate if I have an MTHFR variant?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#Can_high_homocysteine_be_lowered_with_diet\" >Can high homocysteine be lowered with diet?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#Is_TMG_safe_with_kidney_disease\" >Is TMG safe with kidney disease?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/nostylelike.net\/en\/high-homocysteine\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 id=\"top\"><span class=\"ez-toc-section\" id=\"What_Does_High_Homocysteine_Mean\"><\/span>What Does High Homocysteine Mean?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Homocysteine is an amino acid made in the body when it processes methionine, which comes from protein in food. Normally it is quickly recycled with the help of vitamin B12, folate, vitamin B6 and a compound called betaine. When this recycling slows, levels in the blood rise. <strong>High homocysteine<\/strong> is linked in observational studies with heart disease, stroke and blood clots, but as this guide explains, lowering the number has not clearly prevented those events.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_Homocysteine_Is_Recycled\"><\/span>How Homocysteine Is Recycled<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The body clears homocysteine through two main routes. In the first, folate and vitamin B12 help add a methyl group to turn it back into methionine; betaine (TMG) can donate that methyl group through a second route, mainly in the liver and kidneys. In the third route, vitamin B6 helps convert it into cysteine. A shortage in any of these helpers can lead to high homocysteine.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"7_Common_Causes_of_High_Homocysteine\"><\/span>7 Common Causes of High Homocysteine<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><strong>Vitamin B12 deficiency.<\/strong> Common in vegetarians, older adults, people with gastritis or after stomach surgery, and in long-term metformin or acid-reducing medicine users.<\/li>\n<li><strong>Folate deficiency.<\/strong> Linked with low intake of leafy greens and legumes, heavy alcohol use and some medicines such as methotrexate.<\/li>\n<li><strong>Vitamin B6 deficiency.<\/strong> Less common, but seen with poor diet and certain medicines.<\/li>\n<li><strong>MTHFR gene variants.<\/strong> The common C677T variant can raise levels mainly when folate intake is low. Having the variant alone is not a disease.<\/li>\n<li><strong>Kidney disease.<\/strong> Reduced kidney function is one of the strongest causes of high homocysteine.<\/li>\n<li><strong>Hypothyroidism.<\/strong> An underactive thyroid can raise levels, which often fall with thyroid treatment.<\/li>\n<li><strong>Lifestyle and medicines.<\/strong> Smoking, heavy coffee and alcohol intake, and drugs such as some anti-seizure medicines may contribute.<\/li>\n<\/ol>\n<p>Rare inherited disorders such as homocystinuria cause very high levels from childhood and need specialist care.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Testing_for_High_Homocysteine\"><\/span>Testing for High Homocysteine<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A simple blood test measures total homocysteine, ideally after an overnight fast. Many labs consider about 5 to 15 micromoles per litre normal. If the result is raised, a doctor will usually check vitamin B12, folate, kidney function and thyroid tests to find the cause, because treating the cause matters more than the number itself.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; border: 1px solid #e5e7eb;\">\n<thead>\n<tr style=\"background: #f3f4f6;\">\n<th style=\"border: 1px solid #e5e7eb; padding: 8px;\">Level (micromol\/L)<\/th>\n<th style=\"border: 1px solid #e5e7eb; padding: 8px;\">Usual interpretation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #e5e7eb; padding: 8px;\">Below 15<\/td>\n<td style=\"border: 1px solid #e5e7eb; padding: 8px;\">Generally normal (lab ranges vary)<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #e5e7eb; padding: 8px;\">15 to 30<\/td>\n<td style=\"border: 1px solid #e5e7eb; padding: 8px;\">Mildly raised, look for vitamin, kidney or thyroid causes<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #e5e7eb; padding: 8px;\">30 to 100<\/td>\n<td style=\"border: 1px solid #e5e7eb; padding: 8px;\">Moderately raised, needs medical review<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #e5e7eb; padding: 8px;\">Above 100<\/td>\n<td style=\"border: 1px solid #e5e7eb; padding: 8px;\">Severe, may suggest an inherited disorder<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"B_Vitamins_TMG_and_High_Homocysteine\"><\/span>B Vitamins, TMG and High Homocysteine<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>When a deficiency is found, B12, folic acid and sometimes B6 lower homocysteine effectively, and correcting a B12 deficiency also protects the nerves and blood. Betaine is another option. <a href=\"https:\/\/nostylelike.net\/en\/product\/now-tmg-betaine-1000-mg-100-tablets\/\">NOW TMG Betaine 1000 mg<\/a> provides 1,000 mg of trimethylglycine (betaine anhydrous) per tablet; the label suggests 1 to 3 tablets twice daily, preferably with food. TMG donates a methyl group that turns homocysteine into methionine. It is used as a medicine for homocystinuria, and in smaller amounts as a supplement.<\/p>\n<p>Do not confuse TMG with betaine HCl, which is an acid supplement for digestion and does not serve this purpose. High doses of betaine may raise LDL cholesterol, so check your lipids if you take it long term. The tablets are very sensitive to moisture, so keep the bottle tightly closed with its freshness packet.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Does_Lowering_High_Homocysteine_Prevent_Heart_Attacks\"><\/span>Does Lowering High Homocysteine Prevent Heart Attacks?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>This is the key point. Several large randomized trials, including HOPE-2, NORVIT and VITATOPS, gave B vitamins to people with heart or vascular disease. Homocysteine fell, but heart attacks and overall heart events did not clearly decrease. Some analyses suggested a small reduction in stroke, mainly in regions without folic acid fortification. So high homocysteine looks more like a marker of risk than a proven target, and supplements are not a substitute for treating blood pressure, cholesterol, diabetes and smoking.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Other_Heart_Supplements_and_Where_They_Fit\"><\/span>Other Heart Supplements and Where They Fit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Some people with high homocysteine also ask about other heart supplements. Read <a href=\"https:\/\/nostylelike.net\/en\/nattokinase-benefits\/\">nattokinase benefits<\/a> for the safety issues of blood-thinning enzymes, and <a href=\"https:\/\/nostylelike.net\/en\/taurine-benefits\/\">taurine benefits<\/a> for the evidence on this amino acid. For cholesterol, see <a href=\"https:\/\/nostylelike.net\/en\/niacin-vs-niacinamide\/\">niacin vs niacinamide<\/a>. Available at No Style Like:<\/p>\n<ul>\n<li><a href=\"https:\/\/nostylelike.net\/en\/product\/nutricost-nattokinase-2000-fu-120-capsules\/\">Nutricost Nattokinase 2000 FU<\/a>: 100 mg of nattokinase (2,000 fibrinolytic units) per capsule from fermented soybean; 1 capsule daily with water. Contains soy; not for people on blood thinners.<\/li>\n<li><a href=\"https:\/\/nostylelike.net\/en\/product\/now-tmg-betaine-1000-mg-100-tablets\/\">NOW TMG Betaine 1000 mg<\/a>: 1,000 mg of trimethylglycine (betaine anhydrous) per tablet; 1 to 3 tablets twice daily with food. Not the same as betaine HCl.<\/li>\n<li><a href=\"https:\/\/nostylelike.net\/en\/product\/now-taurine-1000-mg-100-veg-capsules\/\">NOW Taurine 1000 mg<\/a>: 1,000 mg of free-form taurine per capsule; 1 capsule once or twice daily with water or juice, preferably between meals.<\/li>\n<li><a href=\"https:\/\/nostylelike.net\/en\/product\/nutricost-vitamin-k2-d3-100-mcg-120-softgels\/\">Nutricost Vitamin K2 D3<\/a>: 5,000 IU (125 mcg) of vitamin D3 plus 100 mcg of vitamin K2 as MK-7 per softgel; 1 softgel daily with a meal containing fat. Interferes with warfarin.<\/li>\n<li><a href=\"https:\/\/nostylelike.net\/en\/product\/now-flush-free-niacin-500-mg-90-veg-capsules\/\">NOW Flush-Free Niacin 500 mg<\/a>: 500 mg niacin plus 122 mg inositol per capsule, from 549 mg inositol hexanicotinate; 1 capsule daily with a meal. Not a cholesterol treatment.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_About_High_Homocysteine\"><\/span>Frequently Asked Questions About High Homocysteine<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Should_everyone_test_their_homocysteine\"><\/span>Should everyone test their homocysteine?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. It is usually tested when B12 or folate deficiency is suspected, after unexplained clots, or in certain specialist settings.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Do_I_need_methylfolate_if_I_have_an_MTHFR_variant\"><\/span>Do I need methylfolate if I have an MTHFR variant?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ordinary folic acid lowers homocysteine in most people with the variant. Ask your doctor before using high doses of any form.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_high_homocysteine_be_lowered_with_diet\"><\/span>Can high homocysteine be lowered with diet?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Eating leafy greens, legumes, eggs, fish and whole grains helps supply folate, B6, B12 and betaine.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_TMG_safe_with_kidney_disease\"><\/span>Is TMG safe with kidney disease?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ask your nephrologist first, as kidney disease changes how betaine and homocysteine are handled.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>High homocysteine usually points to low B12, folate or B6, kidney disease, an underactive thyroid or genetic factors. A blood test and a search for the cause come first. B vitamins and TMG lower the level, but trials did not show clear protection from heart attacks, so focus on proven heart care too. <a href=\"https:\/\/nostylelike.net\/en\/product\/now-tmg-betaine-1000-mg-100-tablets\/\">NOW TMG Betaine<\/a> is available at No Style Like Pharmacy.<\/p>\n<p style=\"font-size: 0.95em; color: #555; margin-top: 18px;\">This article was reviewed by the No Style Like pharmacy content team. It is for general awareness only and does not replace advice from your doctor or pharmacist.<\/p>\n<p style=\"font-size: 0.95em; color: #555;\">Supplements do not replace treatment of blood pressure, cholesterol, diabetes or vitamin deficiencies diagnosed by your doctor. For more information see <a href=\"https:\/\/medlineplus.gov\/lab-tests\/homocysteine-test\/\" target=\"_blank\" rel=\"noopener nofollow\">the MedlinePlus homocysteine test page<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>High homocysteine explained: B12, folate and B6 deficiency, MTHFR, kidney and thyroid causes, the blood test, B vitamins and TMG, and what trials showed.<\/p>\n","protected":false},"author":86,"featured_media":11420140,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42204],"tags":[],"class_list":["post-11420143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dietary-supplements"],"_links":{"self":[{"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/posts\/11420143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/users\/86"}],"replies":[{"embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/comments?post=11420143"}],"version-history":[{"count":1,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/posts\/11420143\/revisions"}],"predecessor-version":[{"id":11420334,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/posts\/11420143\/revisions\/11420334"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/media\/11420140"}],"wp:attachment":[{"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/media?parent=11420143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/categories?post=11420143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/tags?post=11420143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}