{"id":11418614,"date":"2026-10-20T14:13:45","date_gmt":"2026-10-20T11:13:45","guid":{"rendered":"https:\/\/nostylelike.net\/milk-thistle-side-effects\/"},"modified":"2026-10-20T18:26:05","modified_gmt":"2026-10-20T15:26:05","slug":"milk-thistle-side-effects","status":"publish","type":"post","link":"https:\/\/nostylelike.net\/en\/milk-thistle-side-effects\/","title":{"rendered":"Milk Thistle Side Effects: 8 Reactions and Interactions to Know"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 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\/milk-thistle-side-effects\/#Does_Milk_Thistle_Really_Have_Side_Effects\" >Does Milk Thistle Really Have Side Effects?<\/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\/milk-thistle-side-effects\/#1_Digestive_Upset\" >1. Digestive Upset<\/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\/milk-thistle-side-effects\/#2_A_Laxative_Effect\" >2. A Laxative Effect<\/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\/milk-thistle-side-effects\/#3_Allergy_in_the_Ragweed_Family\" >3. Allergy in the Ragweed Family<\/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\/milk-thistle-side-effects\/#4_Milk_Thistle_Side_Effects_in_Diabetes\" >4. Milk Thistle Side Effects in Diabetes<\/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\/milk-thistle-side-effects\/#5_Drug_Interactions\" >5. Drug Interactions<\/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\/milk-thistle-side-effects\/#6_Pregnancy_and_Breastfeeding\" >6. Pregnancy and Breastfeeding<\/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\/milk-thistle-side-effects\/#7_Hormone-Sensitive_Conditions\" >7. Hormone-Sensitive Conditions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/nostylelike.net\/en\/milk-thistle-side-effects\/#8_The_Hidden_Risk_of_Delayed_Care\" >8. The Hidden Risk of Delayed Care<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/nostylelike.net\/en\/milk-thistle-side-effects\/#Who_Should_Avoid_Milk_Thistle\" >Who Should Avoid Milk Thistle?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/nostylelike.net\/en\/milk-thistle-side-effects\/#What_About_Poisonous_Mushrooms\" >What About Poisonous Mushrooms?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/nostylelike.net\/en\/milk-thistle-side-effects\/#How_to_Reduce_Milk_Thistle_Side_Effects\" >How to Reduce Milk Thistle Side Effects<\/a><\/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\/milk-thistle-side-effects\/#FAQ_About_Milk_Thistle_Side_Effects\" >FAQ About Milk Thistle Side Effects<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/nostylelike.net\/en\/milk-thistle-side-effects\/#Can_milk_thistle_harm_the_liver\" >Can milk thistle harm the liver?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/nostylelike.net\/en\/milk-thistle-side-effects\/#Does_it_raise_blood_pressure\" >Does it raise blood pressure?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/nostylelike.net\/en\/milk-thistle-side-effects\/#Can_I_take_it_with_glutathione\" >Can I take it with glutathione?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/nostylelike.net\/en\/milk-thistle-side-effects\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 id=\"top\"><span class=\"ez-toc-section\" id=\"Does_Milk_Thistle_Really_Have_Side_Effects\"><\/span>Does Milk Thistle Really Have Side Effects?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Many people assume anything plant-based is completely safe. Milk thistle is indeed one of the better-tolerated supplements in research, but <strong>milk thistle side effects<\/strong> do exist. They are usually mild, yet some matter a lot for specific groups such as people with diabetes or those taking long-term medication. Here are 8 reactions and interactions worth knowing before you start.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"1_Digestive_Upset\"><\/span>1. Digestive Upset<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>This is the most common of all milk thistle side effects and includes bloating, gas, nausea and indigestion. It usually eases when you take the capsules with food or lower the dose for a few days.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"2_A_Laxative_Effect\"><\/span>2. A Laxative Effect<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Among milk thistle side effects, loose stools or mild diarrhea are fairly common, especially at higher doses. If diarrhea lasts more than two days or is severe, stop the supplement and speak to your pharmacist.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"3_Allergy_in_the_Ragweed_Family\"><\/span>3. Allergy in the Ragweed Family<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Milk thistle belongs to the Asteraceae family, which also includes ragweed, chrysanthemums, marigolds, daisies and chamomile. People allergic to these plants may develop a rash or itching and, rarely, breathing difficulty or facial swelling, which is an emergency. Note that the NOW 300 mg formula also contains dandelion and artichoke, both from the same family.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"4_Milk_Thistle_Side_Effects_in_Diabetes\"><\/span>4. Milk Thistle Side Effects in Diabetes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Some studies suggest silymarin may lower blood sugar. That might sound helpful, but combined with insulin or diabetes tablets it could cause low blood sugar. If you have diabetes, check your glucose more often during the first weeks and tell your doctor before starting.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"5_Drug_Interactions\"><\/span>5. Drug Interactions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Milk thistle may affect some of the liver enzymes that break down medicines, which could raise or lower drug levels in the blood. The evidence is not conclusive, but caution makes sense with:<\/p>\n<ul>\n<li>Blood thinners such as warfarin.<\/li>\n<li>Diabetes medicines.<\/li>\n<li>Some seizure and psychiatric medicines.<\/li>\n<li>Some cholesterol, cancer and transplant medicines.<\/li>\n<\/ul>\n<p>The <a href=\"https:\/\/nostylelike.net\/en\/product\/now-milk-thistle-extract-150-mg-60-veg-capsules\/\">NOW Milk Thistle Extract 150 mg with Turmeric<\/a> adds 700 mg of turmeric per two capsules, and turmeric itself may interact with blood thinners.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"6_Pregnancy_and_Breastfeeding\"><\/span>6. Pregnancy and Breastfeeding<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>There is not enough data on milk thistle safety during pregnancy or breastfeeding, so avoid it unless your doctor approves. The NOW turmeric formula clearly states it is not for pregnant or nursing women.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"7_Hormone-Sensitive_Conditions\"><\/span>7. Hormone-Sensitive Conditions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Milk thistle extract may have a weak estrogen-like effect. People with hormone-sensitive conditions, such as some breast or uterine cancers or endometriosis, should check with their doctor first.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"8_The_Hidden_Risk_of_Delayed_Care\"><\/span>8. The Hidden Risk of Delayed Care<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>One of the most serious indirect milk thistle side effects is delaying proper treatment. Yellowing of the eyes or skin, dark urine or pain under the right ribs need a doctor and blood tests, not a supplement. Evidence for milk thistle in viral hepatitis, cirrhosis and fatty liver is limited and mixed.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Who_Should_Avoid_Milk_Thistle\"><\/span>Who Should Avoid Milk Thistle?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Anyone who has reacted to ragweed, chrysanthemums or chamomile before.<\/li>\n<li>Pregnant and breastfeeding women unless a doctor advises it.<\/li>\n<li>People on several long-term medicines who have not checked with a pharmacist.<\/li>\n<li>Children, as the available products are labeled for adults.<\/li>\n<\/ul>\n<p>In these groups the possible milk thistle side effects carry more weight, so getting advice beforehand matters more than choosing a dose. A healthy adult usually tolerates it without problems, while keeping an eye on the stomach and bowels during the first week.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_About_Poisonous_Mushrooms\"><\/span>What About Poisonous Mushrooms?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>You may read that silibinin, a compound from milk thistle, is used for Amanita mushroom poisoning. That is true, but it is given intravenously in hospital as part of full emergency care. Home capsules are never a substitute. Anyone who suspects mushroom poisoning should go to the emergency department immediately.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Reduce_Milk_Thistle_Side_Effects\"><\/span>How to Reduce Milk Thistle Side Effects<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Start with a small dose and build up slowly, as explained in <a href=\"https:\/\/nostylelike.net\/en\/milk-thistle-dosage\/\">milk thistle dosage<\/a>.<\/li>\n<li>Take it with food.<\/li>\n<li>Choose a standardized extract with a clear label; learn more in our <a href=\"https:\/\/nostylelike.net\/en\/silymarin\/\">silymarin<\/a> guide.<\/li>\n<li>Tell your doctor and pharmacist about every supplement you take.<\/li>\n<li>Do not combine more than one milk thistle product.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"FAQ_About_Milk_Thistle_Side_Effects\"><\/span>FAQ About Milk Thistle Side Effects<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Can_milk_thistle_harm_the_liver\"><\/span>Can milk thistle harm the liver?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Liver harm is not among the known milk thistle side effects at usual doses, but any supplement can cause a rare reaction, so stop it if unusual symptoms appear.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Does_it_raise_blood_pressure\"><\/span>Does it raise blood pressure?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Raised blood pressure is not a recognized side effect, but check with your doctor if you take several heart medicines.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_take_it_with_glutathione\"><\/span>Can I take it with glutathione?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No interaction that adds to milk thistle side effects is known, but ask your pharmacist first. Read <a href=\"https:\/\/nostylelike.net\/en\/glutathione-and-liver\/\">glutathione and liver health<\/a> for more.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Milk thistle side effects are usually mild, such as bloating or loose stools, but caution is needed with ragweed-family allergy, diabetes, long-term medication and pregnancy. You can find <a href=\"https:\/\/nostylelike.net\/en\/product\/now-milk-thistle-extract-300-mg-50-veg-capsules\/\">NOW Milk Thistle Extract 300 mg<\/a>, <a href=\"https:\/\/nostylelike.net\/en\/product\/now-milk-thistle-extract-150-mg-60-veg-capsules\/\">NOW Milk Thistle Extract 150 mg with Turmeric<\/a> and <a href=\"https:\/\/nostylelike.net\/en\/product\/nutricost-milk-thistle-1000-mg-240-capsules\/\">Nutricost Milk Thistle<\/a> 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;\">Stop milk thistle and see a doctor if you develop a rash, breathing difficulty or yellowing, or if you become pregnant. For more information see <a href=\"https:\/\/www.nccih.nih.gov\/health\/milk-thistle\" target=\"_blank\" rel=\"noopener nofollow\">the NCCIH milk thistle page<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Milk thistle side effects: digestive upset, ragweed-family allergy, lower blood sugar, drug interactions and who should avoid it.<\/p>\n","protected":false},"author":86,"featured_media":11418612,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42204],"tags":[],"class_list":["post-11418614","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\/11418614","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=11418614"}],"version-history":[{"count":2,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/posts\/11418614\/revisions"}],"predecessor-version":[{"id":11418936,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/posts\/11418614\/revisions\/11418936"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/media\/11418612"}],"wp:attachment":[{"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/media?parent=11418614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/categories?post=11418614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nostylelike.net\/en\/wp-json\/wp\/v2\/tags?post=11418614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}