{"formatVersion":"1.1","id":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp","path":"/library/major-depression-serotonin-5-htp","url":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp","title":"Major Depression Serotonin Precursors: 5-HTP","family":"Library detail","description":"Discover the benefits and risks of using 5-HTP to increase serotonin levels in the brain.","language":"en-US","access":{"audience":"public","indexable":true},"provenance":{"sourceUrl":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp","wordpressId":"5181","contentCompleteness":"complete","dateScope":"original-source"},"authors":[],"dates":{"datePublished":"2024-05-31T23:31:42Z","dateModified":"2026-05-14T19:35:10Z"},"content":{"html":"<nav aria-label=\"Breadcrumb\" class=\"breadcrumbs\"><ol><li><a href=\"https://www.mentalhealth.com/\">Home</a></li><li><a href=\"https://www.mentalhealth.com/library\">Library</a></li><li><a href=\"https://www.mentalhealth.com/library/depression\">Depression</a></li><li><span aria-current=\"page\">Major Depression Serotonin Precursors: 5-HTP</span></li></ol></nav><div class=\"article-page article-standard\" data-library-standard=\"\"><div class=\"article-main-grid\"><header class=\"article-heading\"><h1>Major Depression Serotonin Precursors: 5-HTP</h1><div class=\"article-dates\"><span>Published on <time datetime=\"2024-05-31T23:31:42Z\">May 31, 2024</time></span><span aria-hidden=\"true\"> · </span><span>Updated on <time datetime=\"2026-05-14T19:35:10Z\">May 14, 2026</time></span></div></header><div class=\"article-jumpbar\"></div><div class=\"article-layout\"><div class=\"article-reading\"><article class=\"prose\" id=\"article-content\"><h2 id=\"what-5-htp-is-and-how-it-relates-to-serotonin\">What 5-HTP is and how it relates to serotonin</h2><p>5-hydorxytryptophan (5-HTP) is a compound made from the amino acid (protein) tryptophan and is primarily found in the brain. 5-HTP is one of the basic building blocks for serotonin. </p><p>Serotonin itself can be manufactured in the laboratory, but when taken as a supplement, it cannot reach the brain (it does not have the ability to cross from general blood circulation into brain circulation, because of the blood-brain barrier; a selective membrane that only allows certain chemicals into the brain). </p>\n<p>Multiple research studies support the use of 5-HTP as a natural way to increase brain serotonin levels. Some research has also supported the use of 5-HTP for treating depression, but the studies are based on small groups of people, limiting the conclusions that can be drawn about the potential benefits of 5-HTP as a generalized depression treatment.</p><figure class=\"article-feature\"><img alt=\"A woman sits quietly on a sofa with her arms resting on her knees.\" decoding=\"async\" height=\"675\" loading=\"eager\" src=\"https://www.mentalhealth.com/assets/optimized/9f49b2f9d25dd2df9932a1bd.webp\" width=\"1200\"></figure><section aria-labelledby=\"key-takeaways\" class=\"article-takeaways\"><h2 id=\"key-takeaways\">Key takeaways</h2><ul><li>5-HTP is a serotonin precursor that has been investigated as a treatment for depression.</li><li>Small study samples limit confidence in its effectiveness as a general depression treatment.</li><li>Interactions with antidepressants and other safety concerns make professional guidance important before use.</li></ul></section><span id=\"safety-and-dosing-a-typical-dose-of-5-htp-is-between-150-300-mg-a-day-5-htp-must-not-be-used-with-any-other-antidepressant-medication-because-of-the-risk-of-serotonin-syndrome-or-serotonin-toxicity-that-produces-mental-confusion-agitation-headache-shivering-sweating-hypertension-high-blood-pressure-tachycardia-fast-heart-rate-and-other-symptoms-5-htp-also-may-interfere-with-lithium-a-medication-typically-used-for-bipolar-disorder\" class=\"section-anchor-alias\" data-section-alias=\"safety-and-dosing\" aria-hidden=\"true\"></span><h2 id=\"safety-and-dosing\">Safety and Dosing</h2><p>\nA typical dose of 5-HTP is between 150-300 mg a day. 5-HTP must not be used with any other antidepressant medication because of the risk of serotonin syndrome (or serotonin toxicity) that produces mental confusion, agitation, headache, shivering, sweating, hypertension (high blood pressure), tachycardia (fast heart rate), and other symptoms. 5-HTP also may interfere with lithium (a medication typically used for <a href=\"https://www.mentalhealth.com/library/bipolar-disorder\" class=\"article-inline-link\" data-context-link=\"353\">bipolar disorder</a>).\n</p><h2 id=\"side-effects-and-cautions\">Side effects and cautions</h2><p>The side effects of 5-HTP include: agitation, drowsiness, flushing, headache, mild stomach upset, and tachycardia (fast heart rate). There is a small risk of developing liver toxicity when using 5-HTP. L-tryptophan, a closely related chemical, was pulled from shelves in 1989 when it was associated with liver failure in a few people taking the supplement. </p><p>While it appears that 5-HTP does not cause this problem, it is best to check with your health practitioner before starting any new medication, especially if you currently have (or have a history of) liver problems.</p><p><strong>WARNING:</strong> Any substance that increases serotonin carries with it the risk of causing a manic episode in people with Bipolar Disorder (manic <a href=\"https://www.mentalhealth.com/library/depression\" class=\"article-inline-link\" data-context-link=\"353\">depression</a>). While the use of 5-HTP hasn't been linked to manic episodes, caution is still warranted. Consult your health care provider before taking 5-HTP if you suspect you might have bipolar disorder.</p><section aria-label=\"Subject matter expert\" class=\"article-expert article-expert-inline\" data-expert-kind=\"related\" data-expert-layout=\"standard\"><p class=\"article-bio-role\">Subject matter expert</p><div class=\"article-expert-identity\"><img alt=\"\" height=\"64\" loading=\"lazy\" src=\"https://www.mentalhealth.com/assets/optimized/5ffe249a46895c9a14f6074b.jpg\" width=\"64\" decoding=\"async\"><h2><a href=\"https://www.mentalhealth.com/people/simone-hoermann\">Simone Hoermann <span class=\"expert-credentials\">Ph.D.</span></a></h2></div><p class=\"article-expert-focus\">Personality disorders, anxiety, and depression</p><a class=\"profile-experience-link experience-button\" href=\"https://www.mentalhealth.com/people/simone-hoermann\">View experience</a></section></article><div class=\"article-endmatter\"><section class=\"article-about article-panel\"><h2 id=\"about-mentalhealth-com\">About MentalHealth.com</h2><p>MentalHealth.com helps people understand themselves, build healthier relationships, and access the right care. We bring together mental health education, diagnostics, and care management to support well-being throughout every phase of life.</p><div class=\"article-contributors\"></div></section><section aria-label=\"Related community\" class=\"article-topic-community article-topic-community-end\"><img alt=\"\" class=\"topic-community-banner\" height=\"675\" loading=\"lazy\" src=\"https://www.mentalhealth.com/assets/optimized/91211a50ddeaa7fa8b3e0af9.webp\" width=\"1200\" decoding=\"async\" srcset=\"/assets/responsive/a4f14d631a3c579a02f683c8.webp 800w, /assets/optimized/91211a50ddeaa7fa8b3e0af9.webp 1200w\" sizes=\"(min-width: 961px) 236px, calc(100vw - 80px)\"><p class=\"topic-community-label\">Related community</p><h2>Depression</h2><p>A place for understanding depression and sharing perspectives on its impact on daily life.</p><a href=\"https://www.mentalhealth.com/community/depression\">Explore community</a></section></div></div><aside aria-label=\"Article navigation and related information\" class=\"article-sidebar\" data-bounded-rail=\"\" tabindex=\"0\"><details class=\"article-contents\" data-expanded=\"false\" data-scrolled-past=\"false\" data-section-preview=\"3\" open=\"\"><summary><strong>Table of contents</strong><span aria-hidden=\"true\"></span><small data-current-section=\"\">Choose a section</small></summary><nav aria-label=\"Article contents\"><ol id=\"article-section-list\"><li><a href=\"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#what-5-htp-is-and-how-it-relates-to-serotonin\" aria-label=\"What 5-HTP is and how it relates to serotonin\" title=\"What 5-HTP is and how it relates to serotonin\">What 5-HTP is and how it relates to serotonin</a></li><li><a href=\"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#safety-and-dosing\" aria-label=\"Safety and Dosing\" title=\"Safety and Dosing\">Safety and Dosing</a></li><li><a href=\"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#side-effects-and-cautions\" aria-label=\"Side effects and cautions\" title=\"Side effects and cautions\">Side effects and cautions</a></li></ol><button aria-controls=\"article-section-list\" aria-expanded=\"false\" class=\"article-sections-toggle\" data-sections-toggle=\"\" hidden=\"\" type=\"button\">View more</button></nav></details></aside></div></div></div>","text":"Home Library Depression Major Depression Serotonin Precursors: 5-HTP Major Depression Serotonin Precursors: 5-HTP Published on May 31, 2024 · Updated on May 14, 2026 What 5-HTP is and how it relates to serotonin 5-hydorxytryptophan (5-HTP) is a compound made from the amino acid (protein) tryptophan and is primarily found in the brain. 5-HTP is one of the basic building blocks for serotonin. Serotonin itself can be manufactured in the laboratory, but when taken as a supplement, it cannot reach the brain (it does not have the ability to cross from general blood circulation into brain circulation, because of the blood-brain barrier; a selective membrane that only allows certain chemicals into the brain). Multiple research studies support the use of 5-HTP as a natural way to increase brain serotonin levels. Some research has also supported the use of 5-HTP for treating depression, but the studies are based on small groups of people, limiting the conclusions that can be drawn about the potential benefits of 5-HTP as a generalized depression treatment. Key takeaways 5-HTP is a serotonin precursor that has been investigated as a treatment for depression. Small study samples limit confidence in its effectiveness as a general depression treatment. Interactions with antidepressants and other safety concerns make professional guidance important before use. Safety and Dosing A typical dose of 5-HTP is between 150-300 mg a day. 5-HTP must not be used with any other antidepressant medication because of the risk of serotonin syndrome (or serotonin toxicity) that produces mental confusion, agitation, headache, shivering, sweating, hypertension (high blood pressure), tachycardia (fast heart rate), and other symptoms. 5-HTP also may interfere with lithium (a medication typically used for bipolar disorder). Side effects and cautions The side effects of 5-HTP include: agitation, drowsiness, flushing, headache, mild stomach upset, and tachycardia (fast heart rate). There is a small risk of developing liver toxicity when using 5-HTP. L-tryptophan, a closely related chemical, was pulled from shelves in 1989 when it was associated with liver failure in a few people taking the supplement. While it appears that 5-HTP does not cause this problem, it is best to check with your health practitioner before starting any new medication, especially if you currently have (or have a history of) liver problems. WARNING: Any substance that increases serotonin carries with it the risk of causing a manic episode in people with Bipolar Disorder (manic depression). While the use of 5-HTP hasn't been linked to manic episodes, caution is still warranted. Consult your health care provider before taking 5-HTP if you suspect you might have bipolar disorder. Subject matter expert Simone Hoermann Ph.D. Personality disorders, anxiety, and depression View experience About MentalHealth.com MentalHealth.com helps people understand themselves, build healthier relationships, and access the right care. We bring together mental health education, diagnostics, and care management to support well-being throughout every phase of life. Related community Depression A place for understanding depression and sharing perspectives on its impact on daily life. Explore community Table of contentsChoose a section What 5-HTP is and how it relates to serotonin Safety and Dosing Side effects and cautions View more","wordCount":514},"schema":{"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://www.mentalhealth.com/#organization","name":"MentalHealth.com","url":"https://www.mentalhealth.com/","publishingPrinciples":"https://www.mentalhealth.com/publishing/editorial-policy"},{"@type":"WebSite","@id":"https://www.mentalhealth.com/#website","url":"https://www.mentalhealth.com/","name":"MentalHealth.com","inLanguage":"en-US","publisher":{"@id":"https://www.mentalhealth.com/#organization"}},{"@type":"BreadcrumbList","@id":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://www.mentalhealth.com/"},{"@type":"ListItem","position":2,"name":"Library","item":"https://www.mentalhealth.com/library"},{"@type":"ListItem","position":3,"name":"Depression","item":"https://www.mentalhealth.com/library/depression"},{"@type":"ListItem","position":4,"name":"Major Depression Serotonin Precursors: 5-HTP","item":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp"}]},{"@type":"ImageObject","@id":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#primaryimage","url":"https://www.mentalhealth.com/assets/optimized/9f49b2f9d25dd2df9932a1bd.webp","contentUrl":"https://www.mentalhealth.com/assets/optimized/9f49b2f9d25dd2df9932a1bd.webp","width":1200,"height":675,"encodingFormat":"image/webp","caption":"A woman sits quietly on a sofa with her arms resting on her knees."},{"@type":"Article","@id":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#article","url":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp","headline":"Major Depression Serotonin Precursors: 5-HTP","description":"Discover the benefits and risks of using 5-HTP to increase serotonin levels in the brain.","wordCount":404,"mainEntityOfPage":{"@id":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#webpage"},"publisher":{"@id":"https://www.mentalhealth.com/#organization"},"articleSection":"Depression","inLanguage":"en-US","image":{"@id":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#primaryimage"},"about":{"@type":"Thing","@id":"https://www.mentalhealth.com/library/depression#topic","name":"Depression"},"citation":[],"datePublished":"2024-05-31T23:31:42Z","dateModified":"2026-05-14T19:35:10Z"},{"@type":"MedicalWebPage","@id":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#webpage","url":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp","name":"Major Depression Serotonin Precursors: 5-HTP","description":"Discover the benefits and risks of using 5-HTP to increase serotonin levels in the brain.","inLanguage":"en-US","isPartOf":{"@id":"https://www.mentalhealth.com/library/depression#webpage"},"breadcrumb":{"@id":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#breadcrumb"},"mainEntity":{"@id":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#article"},"relatedLink":["https://www.mentalhealth.com/library/treatment-for-major-depression","https://www.mentalhealth.com/library/major-depression-and-omega-3","https://www.mentalhealth.com/library/self-help-for-major-depression","https://www.mentalhealth.com/library/current-understandings-of-major-depression","https://www.mentalhealth.com/library/causes-of-depression","https://www.mentalhealth.com/people/simone-hoermann"],"publisher":{"@id":"https://www.mentalhealth.com/#organization"},"medicalAudience":{"@type":"MedicalAudience","audienceType":"General public"},"primaryImageOfPage":{"@id":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#primaryimage"},"image":{"@id":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#primaryimage"},"about":{"@type":"Thing","@id":"https://www.mentalhealth.com/library/depression#topic","name":"Depression"},"citation":[],"datePublished":"2024-05-31T23:31:42Z","dateModified":"2026-05-14T19:35:10Z"}]},"representations":{"html":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp","json":"https://www.mentalhealth.com/data/library/major-depression-serotonin-5-htp.json","jsonLd":"https://www.mentalhealth.com/data/library/major-depression-serotonin-5-htp.ld.json"},"$schema":"https://www.mentalhealth.com/data/page.schema.json","images":[{"url":"https://www.mentalhealth.com/assets/optimized/9f49b2f9d25dd2df9932a1bd.webp","alt":"A woman sits quietly on a sofa with her arms resting on her knees.","width":1200,"height":675},{"url":"https://www.mentalhealth.com/assets/optimized/5ffe249a46895c9a14f6074b.jpg","alt":"","width":64,"height":64},{"url":"https://www.mentalhealth.com/assets/optimized/91211a50ddeaa7fa8b3e0af9.webp","alt":"","width":1200,"height":675}],"sections":[{"id":"what-5-htp-is-and-how-it-relates-to-serotonin","title":"What 5-HTP is and how it relates to serotonin","level":2,"url":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#what-5-htp-is-and-how-it-relates-to-serotonin"},{"id":"key-takeaways","title":"Key takeaways","level":2,"url":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#key-takeaways"},{"id":"safety-and-dosing","title":"Safety and Dosing","level":2,"url":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#safety-and-dosing"},{"id":"side-effects-and-cautions","title":"Side effects and cautions","level":2,"url":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#side-effects-and-cautions"}],"references":[],"relatedReading":[],"links":[{"url":"https://www.mentalhealth.com/","label":"Home"},{"url":"https://www.mentalhealth.com/library","label":"Library"},{"url":"https://www.mentalhealth.com/library/depression","label":"Depression"},{"url":"https://www.mentalhealth.com/library/bipolar-disorder","label":"bipolar disorder"},{"url":"https://www.mentalhealth.com/library/depression","label":"depression"},{"url":"https://www.mentalhealth.com/people/simone-hoermann","label":"Simone Hoermann Ph.D."},{"url":"https://www.mentalhealth.com/people/simone-hoermann","label":"View experience"},{"url":"https://www.mentalhealth.com/community/depression","label":"Explore community"},{"url":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#what-5-htp-is-and-how-it-relates-to-serotonin","label":"What 5-HTP is and how it relates to serotonin"},{"url":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#safety-and-dosing","label":"Safety and Dosing"},{"url":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp#side-effects-and-cautions","label":"Side effects and cautions"}],"seo":{"title":"Major Depression Serotonin Precursors: 5-HTP | MentalHealth.com","description":"Discover the benefits and risks of using 5-HTP to increase serotonin levels in the brain.","canonical":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp","robots":"index,follow","socialImage":{"url":"https://www.mentalhealth.com/assets/optimized/ec9b0cb47c0207d45e88634d.png","width":1200,"height":630,"alt":"MentalHealth.com — Library","type":"image/png","sitemapGroup":"library"}},"breadcrumbs":[{"name":"Home","url":"https://www.mentalhealth.com/"},{"name":"Library","url":"https://www.mentalhealth.com/library"},{"name":"Depression","url":"https://www.mentalhealth.com/library/depression"},{"name":"Major Depression Serotonin Precursors: 5-HTP","url":"https://www.mentalhealth.com/library/major-depression-serotonin-5-htp"}],"subjectMatterExpert":{"name":"Simone Hoermann, Ph.D.","url":"/people/simone-hoermann","profileId":"6419","topic":"mood","focus":"Personality disorders, anxiety, and depression","selectionBasis":"Documented expertise in the existing published profile","reviewAttribution":false},"keyTakeaways":["5-HTP is a serotonin precursor that has been investigated as a treatment for depression.","Small study samples limit confidence in its effectiveness as a general depression treatment.","Interactions with antidepressants and other safety concerns make professional guidance important before use."],"navigation":[{"label":"What 5-HTP is and how it relates to serotonin","href":"#what-5-htp-is-and-how-it-relates-to-serotonin","heading":"What 5-HTP is and how it relates to serotonin"},{"label":"Safety and Dosing","href":"#safety-and-dosing","heading":"Safety and Dosing"},{"label":"Side effects and cautions","href":"#side-effects-and-cautions","heading":"Side effects and cautions"}],"relatedCommunity":{"community":"/community/depression","basis":"topic match"},"reviewer":null,"introduction":null,"collections":[]}