{"id":19391,"date":"2026-05-07T22:23:44","date_gmt":"2026-05-07T20:23:44","guid":{"rendered":"https:\/\/www.ngdcare.nl\/product\/uncategorized\/l-glutamine\/"},"modified":"2026-05-12T23:07:17","modified_gmt":"2026-05-12T21:07:17","slug":"l-glutamine","status":"publish","type":"product","link":"https:\/\/www.ngdcare.nl\/en\/product\/veterinary-health\/orthomolecular-supplements\/l-glutamine\/","title":{"rendered":"L-Glutamine"},"content":{"rendered":"<div style=\"max-width: 860px; font-family: sans-serif; color: #333; line-height: 1.7;\">\n<div style=\"background: #eaf4ea; border-left: 4px solid #2b5040; padding: 18px 22px; margin-bottom: 28px;\">\n<p style=\"margin: 0; font-size: 1rem; color: #162920;\"><strong>This supplement helps with:<\/strong> recurrent diarrhea, a gut that does not recover after illness or antibiotics, increased intestinal permeability and muscle loss in chronically ill animals. Core component of phase 2 of the NGD Care Bowel Protocol. <\/p>\n<\/div>\n<h2 style=\"font-size: 1.2rem; color: #2b5040; border-bottom: 2px solid #eaf4ea; padding-bottom: 8px; margin-bottom: 16px;\">How does L-Glutamine work?<\/h2>\n<p>L-Glutamine is the primary fuel for the cells of the intestinal wall. These cells completely renew themselves every three to five days and need enormous amounts of energy and building materials to do so. Glutamine provides both. Without enough glutamine, the intestinal wall weakens and substances that should not pass through leak through.   <\/p>\n<p>In case of illness, chronic intestinal complaints, surgery or prolonged stress, the own production falls short while the need increases. At that point, glutamine is conditionally essential. Supplementation helps repair the intestinal wall from the inside out and support the immune system in the gut.  <\/p>\n<p>Glutamine is also the precursor of glutathione, the most powerful endogenous antioxidant, and thus indirectly helps the liver in detoxification. In cachexia due to cancer or chronic disease, glutamine inhibits muscle breakdown and protects the intestinal wall at the same time. <\/p>\n<h2 style=\"font-size: 1.2rem; color: #2b5040; border-bottom: 2px solid #eaf4ea; padding-bottom: 8px; margin: 28px 0 16px;\">What does this supplement do?<\/h2>\n<ul style=\"padding-left: 20px; margin-bottom: 24px;\">\n<li style=\"margin-bottom: 8px;\">Helps with recurring diarrhea and a bowel that just won&#8217;t recover<\/li>\n<li style=\"margin-bottom: 8px;\">Restores the intestinal wall from the inside out after infection, antibiotics or illness<\/li>\n<li style=\"margin-bottom: 8px;\">Supports the immune system in the gut via sIgA production<\/li>\n<li style=\"margin-bottom: 8px;\">Helps with muscle breakdown due to chronic illness or recovery<\/li>\n<li style=\"margin-bottom: 8px;\">Phase 2 component of the NGD Care Bowel Protocol<\/li>\n<\/ul>\n<h2 style=\"font-size: 1.2rem; color: #2b5040; border-bottom: 2px solid #eaf4ea; padding-bottom: 8px; margin: 28px 0 20px;\">When do you see results?<\/h2>\n<p style=\"font-size: .88rem; color: #666; margin-bottom: 20px; font-style: italic;\">L-Glutamine works best in an already sanitized intestine. From a systems biology point of view: in an actively inflamed intestinal environment, the effect of glutamine is undermined by continuous damage. Only after the cleansing phase via phase 1 of the Gut Protocol can glutamine reach its full potential.  <\/p>\n<div style=\"display: grid; grid-template-columns: repeat(auto-fit,minmax(160px,1fr)); gap: 3px; margin-bottom: 16px;\">\n<div style=\"background: #eaf4ea; padding: 16px;\">\n<div style=\"font-size: .72rem; font-weight: bold; letter-spacing: .1em; text-transform: uppercase; color: #2b5040; margin-bottom: 8px;\">Week 1-2<\/div>\n<p style=\"margin: 0; font-size: .85rem; color: #333;\">Glutamine begins to nourish enterocytes and restore tight junction protein expression. Calmer bowel behavior noticeable. <\/p>\n<\/div>\n<div style=\"background: #d5e8d5; padding: 16px;\">\n<div style=\"font-size: .72rem; font-weight: bold; letter-spacing: .1em; text-transform: uppercase; color: #2b5040; margin-bottom: 8px;\">Week 2-4<\/div>\n<p style=\"margin: 0; font-size: .85rem; color: #333;\">Firmer stools, fewer abdominal complaints. Better food intake visible in more energy and better condition and coat. <\/p>\n<\/div>\n<div style=\"background: #c4dcc4; padding: 16px;\">\n<div style=\"font-size: .72rem; font-weight: bold; letter-spacing: .1em; text-transform: uppercase; color: #162920; margin-bottom: 8px;\">Month 1-2<\/div>\n<p style=\"margin: 0; font-size: .85rem; color: #333;\">Significantly better intestinal barrier. Fewer recurrent infections. Better resistance due to improved sIgA production in the intestine.  <\/p>\n<\/div>\n<div style=\"background: #2b5040; padding: 16px;\">\n<div style=\"font-size: .72rem; font-weight: bold; letter-spacing: .1em; text-transform: uppercase; color: #d5cd47; margin-bottom: 8px;\">Month 2+<\/div>\n<p style=\"margin: 0; font-size: .85rem; color: #fff;\">In case of chronic intestinal complaints or IBD, use continuously as maintenance. Quitting can cause relapse in structurally reduced bowel function. <\/p>\n<\/div>\n<\/div>\n<div style=\"background: #fff8e1; border-left: 4px solid #d5cd47; padding: 14px 18px; margin-bottom: 28px;\">\n<p style=\"margin: 0; font-size: .85rem; color: #5a4000;\">Don&#8217;t see any difference after 6 weeks? Contact us via our app or email, or schedule an intake with <a href=\"https:\/\/www.ngdcare.nl\/en\/consultation\/\">integrative veterinarian Stefan Veenstra <\/a>  <\/p>\n<\/div>\n<h2 style=\"font-size: 1.2rem; color: #2b5040; border-bottom: 2px solid #eaf4ea; padding-bottom: 8px; margin-bottom: 16px;\">Why NGD Care L-Glutamine?<\/h2>\n<div style=\"overflow-x: auto;\">\n<table style=\"width: 100%; border-collapse: collapse; font-size: .86rem;\">\n<thead>\n<tr style=\"background: #2b5040; color: #fff;\">\n<th style=\"padding: 11px 14px; text-align: left; font-weight: 600; width: 34%;\">Characteristic<\/th>\n<th style=\"padding: 11px 14px; text-align: left; font-weight: 600; width: 33%;\">NGD Care<\/th>\n<th style=\"padding: 11px 14px; text-align: left; font-weight: 600; width: 33%;\">Medium supplement<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; font-weight: 600;\">First result<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #2b5040;\">Noticeable from week 2-4 in remediated intestine<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #888;\">Comparable, but less effective without a protocol approach<\/td>\n<\/tr>\n<tr style=\"background: #f9fcf9;\">\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; font-weight: 600;\">Deployment<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #2b5040;\">As part of systemic Bowel Protocol: optimal effect<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #888;\">Used separately: limited effect in actively inflamed intestine<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; font-weight: 600;\">Form of<\/td>\n<p> administration<\/p>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #2b5040;\">Capsule with only active ingredients<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #888;\">Powder or tablet: often with fillers and flavorings<\/td>\n<\/tr>\n<tr style=\"background: #f9fcf9;\">\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; font-weight: 600;\">Scientifically substantiated<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #2b5040;\">\u2705 Yes RCT Gut 2019 Post-Infectious IBS, Veterinary Credentials<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #888;\">Variable<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; font-weight: 600;\">Human Grade quality<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #2b5040;\">\u2705<\/td>\n<p> Yes<\/p>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #888;\">Often not<\/td>\n<\/tr>\n<tr style=\"background: #f9fcf9;\">\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; font-weight: 600;\">Green label<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #2b5040;\">\u2705 Yes free of synthetic fillers<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #888;\">Rarely<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; font-weight: 600;\">Free of flavours and fragrances<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #2b5040;\">\u2705<\/td>\n<p> Yes<\/p>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #888;\">Often not<\/td>\n<\/tr>\n<tr style=\"background: #f9fcf9;\">\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; font-weight: 600;\">Free from animal by-products<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #2b5040;\">\u2705<\/td>\n<p> Yes<\/p>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #888;\">Often not<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; font-weight: 600;\">Part of systemic protocol<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #2b5040;\">\u2705 Yes phase 2 Bowel Protocol, Giardia Protocol, Operation Recovery Package<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #888;\">\u274c Individual supplements<\/td>\n<\/tr>\n<tr style=\"background: #f9fcf9;\">\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; font-weight: 600;\">Developed by veterinarian<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #2b5040;\">\u2705 Stefan Veenstra DVM<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #eaf4ea; color: #888;\">Rarely<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 10px 14px; font-weight: 600;\">Personal guidance<\/td>\n<td style=\"padding: 10px 14px; color: #2b5040;\">\u2705 Intake possible via NatuurlijkGezondeDieren.nl<\/td>\n<td style=\"padding: 10px 14px; color: #888;\">\u274c Not available<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"font-size: .75rem; color: #aaa; margin-top: 8px;\">Comparison based on common glutamine supplements for dogs and cats on the Dutch market.<\/p>\n<div style=\"background: #2b5040; color: #fff; padding: 20px 24px; margin: 28px 0;\">\n<p style=\"margin: 0 0 10px; font-size: .85rem; font-weight: bold; letter-spacing: .08em; text-transform: uppercase; color: #d5cd47;\">Part of a protocol<\/p>\n<p style=\"margin: 0 0 14px; color: rgba(255,255,255,.88); font-size: .95rem;\">L-Glutamine is the core piece of phase 2 of the Gut Protocol, the Giardia Protocol and the Operation Recovery Package for intestinal wall repair in dogs, cats and humans.<\/p>\n<p><a style=\"display: inline-block; background: #d5cd47; color: #162920; padding: 9px 20px; font-weight: bold; font-size: .85rem; text-decoration: none; letter-spacing: .04em;\" href=\"https:\/\/www.ngdcare.nl\/en\/product\/veterinary-health\/protocols\/gut-protocol-phase-1\/\">View the Bowel Protocol<\/a><\/p>\n<\/div>\n<div style=\"margin: 28px 0;\">[trustindex no-registration=&#8221;google&#8221;]<\/div>\n<div style=\"border: 1px solid #c8dbc8; padding: 20px 24px; margin: 28px 0;\">\n<p style=\"margin: 0 0 4px; font-size: .85rem; font-weight: bold; letter-spacing: .08em; text-transform: uppercase; color: #2b5040;\">Works well with<\/p>\n<p style=\"margin: 0 0 16px; font-size: .82rem; color: #888;\">L-Glutamine repairs the intestinal wall from the inside out. The supplements below enhance this recovery through additional pathways. <\/p>\n<div style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 12px;\">\n<div style=\"background: #f9fcf9; padding: 14px 16px; border-left: 3px solid #d5cd47;\">\n<p style=\"margin: 0 0 4px; font-weight: bold; color: #162920; font-size: .9rem;\"><a href=\"https:\/\/www.ngdcare.nl\/en\/product\/veterinary-health\/orthomolecular-supplements\/liposomal-humic-and-fulvic-acid\/\">Gut Barrier Support<\/a><\/p>\n<p style=\"margin: 0; font-size: .83rem; color: #555;\">L-Glutamine repairs the intestinal wall from the inside out via tight junctions. Gut Barrier Support strengthens the barrier from the outside via humic acid and removes toxins via fulvic acid. Together the most complete intestinal wall repair available.  <\/p>\n<\/div>\n<div style=\"background: #f9fcf9; padding: 14px 16px; border-left: 3px solid #d5cd47;\">\n<p style=\"margin: 0 0 4px; font-weight: bold; color: #162920; font-size: .9rem;\"><a href=\"https:\/\/www.ngdcare.nl\/en\/product\/veterinary-health\/orthomolecular-supplements\/liposomal-glutathione\/\">Glutathione<\/a><\/p>\n<p style=\"margin: 0; font-size: .83rem; color: #555;\">Glutamine is the direct precursor of glutathione. Co-supplementing provides both exogenous glutathione and increased endogenous production. The strongest combination for liver detoxification and cell protection.  <\/p>\n<\/div>\n<div style=\"background: #f9fcf9; padding: 14px 16px; border-left: 3px solid #d5cd47;\">\n<p style=\"margin: 0 0 4px; font-weight: bold; color: #162920; font-size: .9rem;\"><a href=\"https:\/\/www.ngdcare.nl\/en\/product\/veterinary-health\/orthomolecular-supplements\/liposomal-vitamin-b-complex\/\">Active Vit B-Complex<\/a><\/p>\n<p style=\"margin: 0; font-size: .83rem; color: #555;\">L-Glutamine repairs the intestinal epithelium so that B vitamins are better absorbed. B vitamins support the energy production that enterocytes need for recovery. Together phase 2 of the Bowel Protocol.  <\/p>\n<\/div>\n<div style=\"background: #f9fcf9; padding: 14px 16px; border-left: 3px solid #d5cd47;\">\n<p style=\"margin: 0 0 4px; font-weight: bold; color: #162920; font-size: .9rem;\"><a href=\"https:\/\/www.ngdcare.nl\/en\/product\/veterinary-health\/orthomolecular-supplements\/prebiotics\/\">Prebiotic Fibers<\/a><\/p>\n<p style=\"margin: 0; font-size: .83rem; color: #555;\">L-Glutamine gives enterocytes a healthy substrate. Prebiotic Fibers feeds the good bacteria that grow on that restored intestinal wall. Together structure and microbiome for complete intestinal recovery.  <\/p>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"border: 1px solid #c8dbc8; padding: 18px 22px; margin: 28px 0; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;\">\n<div>\n<p style=\"margin: 0 0 4px; font-weight: bold; color: #2b5040; font-size: .95rem;\">Want to know more about the science behind this supplement?<\/p>\n<p style=\"margin: 0; color: #666; font-size: .88rem;\">Stefan Veenstra DVM explains how glutamine repairs the intestinal wall and why it is conditionally essential in sick and convalescent animals.<\/p>\n<\/div>\n<p><a style=\"display: inline-block; background: #2b5040; color: #fff; padding: 9px 20px; font-weight: bold; font-size: .85rem; text-decoration: none; white-space: nowrap; letter-spacing: .04em;\" href=\"https:\/\/www.ngdcare.nl\/en\/blog-en\/l-glutamine\/\">Read the blog<\/a><\/p>\n<\/div>\n<div style=\"border-top: 2px solid #eaf4ea; padding-top: 20px; margin-top: 28px; display: flex; align-items: center; gap: 16px;\">\n<div style=\"background: #2b5040; color: #fff; width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 1.1rem; flex-shrink: 0;\">SV<\/div>\n<p style=\"margin: 0; font-size: .88rem; color: #555;\">Developed and clinically substantiated by <strong style=\"color: #2b5040;\">Stefan Veenstra DVM<\/strong>, integrative veterinarian and founder of NGD Care. <a style=\"color: #2b5040;\" href=\"https:\/\/www.stefanveenstra.nl\" target=\"_blank\" rel=\"noopener\">More about Stefan \u2192<\/a><\/p>\n<\/div>\n<p style=\"font-size: .78rem; color: #999; font-style: italic; margin-top: 24px; padding-top: 16px; border-top: 1px solid #eee;\">This information is educational in nature and does not replace a veterinary consultation. In case of severe or persistent complaints, always consult a veterinarian. <\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Recurring diarrhea, a leaky gut or an animal that just doesn&#8217;t get stronger after illness? L-Glutamine is the main fuel for the cells of the intestinal wall and helps to repair them from the inside out. Part of phase 2 of the NGD Care Bowel Protocol.  <\/p>\n","protected":false},"featured_media":21429,"comment_status":"closed","ping_status":"closed","template":"","meta":{"wds_primary_product_brand":0,"wds_primary_product_cat":0,"wds_primary_merken":0},"product_brand":[],"product_cat":[192,8543],"product_tag":[149,1026,8584,463,8579,8580,8582,1003],"merken":[],"class_list":["post-19391","product","type-product","status-publish","has-post-thumbnail","product_cat-orthomolecular-supplements","product_cat-veterinary-health","product_tag-bowels","product_tag-giardia-en","product_tag-hyperpermeable-intestine","product_tag-leaky-gut-en","product_tag-old-age","product_tag-oncology","product_tag-operation","product_tag-skin","infinite-scroll-item","sales-flash-overlay","woocommerce-text-align-center","woocommerce-image-align-center","do-quantity-buttons","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"meta_box":[],"_links":{"self":[{"href":"https:\/\/www.ngdcare.nl\/en\/wp-json\/wp\/v2\/product\/19391","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ngdcare.nl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.ngdcare.nl\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ngdcare.nl\/en\/wp-json\/wp\/v2\/comments?post=19391"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ngdcare.nl\/en\/wp-json\/wp\/v2\/media\/21429"}],"wp:attachment":[{"href":"https:\/\/www.ngdcare.nl\/en\/wp-json\/wp\/v2\/media?parent=19391"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.ngdcare.nl\/en\/wp-json\/wp\/v2\/product_brand?post=19391"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.ngdcare.nl\/en\/wp-json\/wp\/v2\/product_cat?post=19391"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.ngdcare.nl\/en\/wp-json\/wp\/v2\/product_tag?post=19391"},{"taxonomy":"merken","embeddable":true,"href":"https:\/\/www.ngdcare.nl\/en\/wp-json\/wp\/v2\/merken?post=19391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}