{"id":6207,"date":"2025-12-19T17:58:39","date_gmt":"2025-12-19T13:58:39","guid":{"rendered":"https:\/\/gastroclinic.am\/?page_id=6207"},"modified":"2026-02-22T23:11:06","modified_gmt":"2026-02-22T19:11:06","slug":"lactose","status":"publish","type":"page","link":"https:\/\/gastroclinic.am\/en\/lactose\/","title":{"rendered":"Lactose Intolerance &#8211; hydrogen breath test"},"content":{"rendered":"\n\n\t<section class=\"section\" id=\"section_2089527509\">\n\t\t<div class=\"section-bg fill\" >\n\t\t\t\t\t\t\t\t\t\n\t\t\t\n\n\t\t<\/div>\n\n\t\t\n\n\t\t<div class=\"section-content relative\">\n\t\t\t\n\n\t<div id=\"gap-513142092\" class=\"gap-element clearfix hide-for-medium\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-513142092 {\n  padding-top: 30px;\n}\n<\/style>\n\t<\/div>\n\t\n\n<div class=\"row row-collapse\"  id=\"row-1528237475\">\n\n\n\t<div id=\"col-1019524604\" class=\"col medium-12 small-12 large-8\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\n\n  <div class=\"banner has-hover\" id=\"banner-1946569667\">\n          <div class=\"banner-inner fill\">\n        <div class=\"banner-bg fill\" >\n            <img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/gastroclinic.am\/wp-content\/uploads\/2025\/12\/ChatGPT-Image-19-\u0434\u0435\u043a.-2025-\u0433.-12_27_35.avif\" class=\"bg attachment-original size-original not-transparent\" alt=\"lactose intolerance \u043b\u0430\u043a\u0442\u043e\u0437\u044b \u056c\u0561\u056f\u057f\u0578\u0566\u0561\u0575\u056b \u0561\u0576\u057f\u0561\u0576\u0565\u056c\u056b\u0578\u0582\u0569\u0575\u0578\u0582\u0576\" data-has-transparency=\"false\" data-dominant-color=\"c29f89\" style=\"--dominant-color: #c29f89;\" \/>                                    \n                    <\/div>\n\t\t\n        <div class=\"banner-layers container\">\n            <div class=\"fill banner-link\"><\/div>            \n\n\n        <\/div>\n      <\/div>\n\n            \n<style>\n#banner-1946569667 {\n  padding-top: 56.25%;\n  background-color: rgba(255, 255, 255, 0);\n}\n#banner-1946569667 .banner-bg img {\n  object-position: 100% 22%;\n}\n@media (min-width:550px) {\n  #banner-1946569667 {\n    padding-top: 56.25%;\n  }\n}\n<\/style>\n  <\/div>\n\n\n\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n<\/div>\n<div class=\"row row-small align-right\"  id=\"row-93732539\">\n\n\n\t<div id=\"col-2141523713\" class=\"col medium-12 small-12 large-7\"  >\n\t\t\t\t<div class=\"col-inner\" style=\"background-color:rgb(255, 255, 255);\" >\n\t\t\t\n\t\t\t\n\n\t<div id=\"text-1925482466\" class=\"text\">\n\t\t\n\n<h1 style=\"text-align: center;\" data-start=\"4565\" data-end=\"4623\">Lactose Intolerance<\/h1>\n<p style=\"text-align: center;\" data-start=\"4565\" data-end=\"4623\">hydrogen breath test<\/p>\n\t\t\n<style>\n#text-1925482466 {\n  font-size: 0.95rem;\n  text-align: center;\n}\n@media (min-width:550px) {\n  #text-1925482466 {\n    font-size: 1.25rem;\n  }\n}\n<\/style>\n\t<\/div>\n\t\n<div class=\"is-divider divider clearfix\" style=\"max-width:60px;height:5px;background-color:rgb(119, 174, 92);\"><\/div>\n\n<h3 data-start=\"4405\" data-end=\"4437\">What is lactose intolerance?<\/h3>\n<p data-start=\"4439\" data-end=\"4672\"><a href=\"https:\/\/gi.org\/topics\/lactose-intolerance-in-children\/\">Lactose intolerance is a condition caused by reduced activity of the enzyme lactase in the small intestine. As a result, lactose (milk sugar) is not fully digested and passes into the colon, where it undergoes bacterial fermentation.<\/a><\/p>\n\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-2141523713 > .col-inner {\n  padding: 7% 8% 5% 8%;\n  margin: -15px 0px 0px 0px;\n  border-radius: 30px;\n}\n@media (min-width:550px) {\n  #col-2141523713 > .col-inner {\n    padding: 6% 8% 5% 8%;\n    margin: -20px 0px 0px 0px;\n  }\n}\n@media (min-width:850px) {\n  #col-2141523713 > .col-inner {\n    padding: 8% 8% 5% 8%;\n    margin: -30px 0px 0px 0px;\n  }\n}\n<\/style>\n\t<\/div>\n\n\t\n\n<\/div>\n\n\t\t<\/div>\n\n\t\t\n<style>\n#section_2089527509 {\n  padding-top: 0px;\n  padding-bottom: 0px;\n  background-color: rgb(255,255,255);\n}\n@media (min-width:550px) {\n  #section_2089527509 {\n    padding-top: 0px;\n    padding-bottom: 0px;\n  }\n}\n@media (min-width:850px) {\n  #section_2089527509 {\n    padding-top: 10px;\n    padding-bottom: 10px;\n  }\n}\n<\/style>\n\t<\/section>\n\t\n\n\t<section class=\"section\" id=\"section_1331856309\">\n\t\t<div class=\"section-bg fill\" >\n\t\t\t\t\t\t\t\t\t\n\t\t\t\n\n\t\t<\/div>\n\n\t\t\n\n\t\t<div class=\"section-content relative\">\n\t\t\t\n\n<div class=\"row\"  id=\"row-360194078\">\n\n\n\t<div id=\"col-1604947428\" class=\"col medium-12 small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\n<div class=\"is-divider divider clearfix\" style=\"max-width:100px;height:5px;background-color:rgb(119, 174, 92);\"><\/div>\n\n\t<div id=\"text-2106848788\" class=\"text\">\n\t\t\n\n<h3 data-start=\"4822\" data-end=\"4870\">General overview of the hydrogen breath test<\/h3>\n<p data-start=\"4872\" data-end=\"5060\">The hydrogen breath test is a non-invasive method used to detect impaired lactose digestion. It is based on measuring hydrogen produced during bacterial fermentation of undigested lactose.<\/p>\n<p data-start=\"5062\" data-end=\"5195\">Unlike SIBO, hydrogen elevation in l. intolerance occurs later, which allows these two conditions to be reliably differentiated.<\/p>\n<h2 data-start=\"1359\" data-end=\"1409\"><img data-dominant-color=\"e4c6d3\" data-has-transparency=\"false\" loading=\"lazy\" decoding=\"async\" class=\"wp-image-1574 alignnone not-transparent\" style=\"--dominant-color: #e4c6d3; color: #555555; font-size: 14.4px;\" src=\"https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-12221146-400x400.webp\" alt=\"SIBO\" width=\"300\" height=\"300\" srcset=\"https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-12221146-400x400.webp 400w, https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-12221146-800x800.webp 800w, https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-12221146-280x280.webp 280w, https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-12221146-768x768.webp 768w, https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-12221146-jpg.webp 1500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><img data-dominant-color=\"f5dfe9\" data-has-transparency=\"false\" style=\"--dominant-color: #f5dfe9;\" loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-3047 not-transparent\" src=\"https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-17676447-400x400.webp\" alt=\"SIBO\" width=\"302\" height=\"302\" srcset=\"https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-17676447-400x400.webp 400w, https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-17676447-800x800.webp 800w, https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-17676447-280x280.webp 280w, https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-17676447-768x768.webp 768w, https:\/\/gastroclinic.am\/wp-content\/uploads\/2024\/03\/67743-17676447.webp 1500w\" sizes=\"auto, (max-width: 302px) 100vw, 302px\" \/><\/h2>\n<h3 data-start=\"5202\" data-end=\"5229\">Examination methodology<\/h3>\n<p data-start=\"5231\" data-end=\"5422\">After ingestion of a lactose solution, hydrogen production increases only if lactose is not properly digested. A rise in hydrogen concentration in exhaled air indicates lactose malabsorption.<\/p>\n<hr data-start=\"5424\" data-end=\"5427\" \/>\n<h3 data-start=\"5429\" data-end=\"5460\"><a href=\"https:\/\/gi.org\/topics\/lactose-intolerance-in-children\/\">When is the test indicated?<\/a><\/h3>\n<p data-start=\"5462\" data-end=\"5650\">The test is prescribed by a physician when lactose intolerance is suspected. It is particularly recommended for patients whose symptoms develop after consumption of milk or dairy products.<\/p>\n<hr data-start=\"5652\" data-end=\"5655\" \/>\n<h3 data-start=\"5657\" data-end=\"5672\">Indications<\/h3>\n<ul data-start=\"5674\" data-end=\"5885\">\n<li data-start=\"5674\" data-end=\"5706\">\n<p data-start=\"5676\" data-end=\"5706\">bloating after dairy intake,<\/p>\n<\/li>\n<li data-start=\"5707\" data-end=\"5747\">\n<p data-start=\"5709\" data-end=\"5747\">diarrhea following milk consumption,<\/p>\n<\/li>\n<li data-start=\"5748\" data-end=\"5793\">\n<p data-start=\"5750\" data-end=\"5793\">abdominal pain and intestinal discomfort,<\/p>\n<\/li>\n<li data-start=\"5794\" data-end=\"5832\">\n<p data-start=\"5796\" data-end=\"5832\">suspected adult-type hypolactasia,<\/p>\n<\/li>\n<li data-start=\"5833\" data-end=\"5885\">\n<p data-start=\"5835\" data-end=\"5885\">differentiation between SIBO and food intolerance.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"5887\" data-end=\"5890\" \/>\n<h3 data-start=\"5892\" data-end=\"5913\">Contraindications<\/h3>\n<p data-start=\"5915\" data-end=\"6098\">Absolute and relative contraindications are the same as for the SIBO hydrogen breath test and include hypoglycemia, recent antibiotic use, lactulose intake, and recent barium studies.<\/p>\n<hr data-start=\"6100\" data-end=\"6103\" \/>\n<h3 data-start=\"6105\" data-end=\"6134\">How the test is performed<\/h3>\n<p data-start=\"6136\" data-end=\"6338\">The examination is carried out on an empty stomach. Baseline hydrogen levels are measured first, followed by ingestion of a lactose solution. Serial breath samples are collected over the next 2\u20133 hours.<\/p>\n<p data-start=\"6340\" data-end=\"6441\">Testing for lactose intolerance is performed on a separate day and is not combined with SIBO testing.<\/p>\n<hr data-start=\"6443\" data-end=\"6446\" \/>\n<h3 data-start=\"6448\" data-end=\"6463\">Preparation<\/h3>\n<p data-start=\"6465\" data-end=\"6646\">Preparation rules are identical to those for the SIBO breath test and include dietary restrictions, medication withdrawal, and avoidance of physical exertion before the examination.<\/p>\n<hr data-start=\"6648\" data-end=\"6651\" \/>\n<h3 data-start=\"6653\" data-end=\"6669\">Test results<\/h3>\n<p data-start=\"6671\" data-end=\"6829\">Based on the hydrogen curve, the physician determines whether lactose intolerance is present and provides appropriate dietary and therapeutic recommendations.<\/p>\n<hr data-start=\"6831\" data-end=\"6834\" \/>\n<h3 data-start=\"6836\" data-end=\"6845\">Price<\/h3>\n<p data-start=\"6847\" data-end=\"6908\"><a href=\"https:\/\/gastroclinic.am\/en\/price\/\">Lactose intolerance hydrogen breath test \u2014 <strong data-start=\"6894\" data-end=\"6908\">18,000 AMD<\/strong><\/a><\/p>\n\t\t\n<style>\n#text-2106848788 {\n  font-size: 1rem;\n  line-height: 1.15;\n}\n<\/style>\n\t<\/div>\n\t\n<a data-animate=\"bounceIn\" class=\"button alert is-shade box-shadow-5 box-shadow-5-hover expand\" style=\"border-radius:99px;\">\n\t\t<span>ONLINE BOOKING<\/span>\n\t<i class=\"icon-angle-down\" aria-hidden=\"true\"><\/i><\/a>\n\n\n<script type=\"text\/javascript\">\n    (function (win, fn) {\n        var done = false, top = true,\n            doc = win.document,\n            root = doc.documentElement,\n            modern = doc.addEventListener,\n            add = modern ? 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