Tesamorelin
Shop TesamorelinAlso called: Egrifta, LN18178 (TesNor®), TH9507
Tesamorelin is a lab-made copy of a natural body chemical that tells the brain's pituitary gland to release growth hormone. It is a short chain of building blocks called amino acids, made in a lab. Some companies sell it online as a "research product." It is often talked about by people interested in fat loss, especially fat around the belly organs. In studies, tesamorelin works by mimicking the body's own growth-hormone-releasing signal.
This causes the pituitary to release growth hormone in natural pulses. Growth hormone then helps the body break down stored fat, especially the deep belly fat called visceral fat. Researchers study it mainly for this fat-reducing effect, and one blog guide describes it as a "stabilized" version of the natural signal that lasts longer in the body. There is still a lot that is not known.
Human evidence for belly-fat reduction exists from HIV-related studies, but the FDA warned one seller in 2026 that tesamorelin sold online is an unapproved drug. Products sold as "research chemicals" may be impure, mislabeled, or not sterile, and a scientist quoted in news coverage warned about wrong doses, contamination, and lack of sterilization. Self-injecting these products carries real risks, so anyone considering treatment should talk to a doctor.
Benefits
What Tesamorelin Helps With
The main themes across 50 research studies, in plain language.
Glycemic & metabolic
Liver fat reduction
50/100Rated 50/100Source typeUnclassified sourceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 30 underlying claimsStudies indicate potential for decreasing liver fat content and improving markers of fatty liver disease.
Lipid profile improvement
50/100Rated 50/100Source typeUnclassified sourceIndependent sources5Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 21 underlying claimsEvidence points to improvements in cholesterol and triglyceride levels.
Insulin sensitivity
60/100Rated 60/100Source typeSpecialist communityIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 7 underlying claimsResearch suggests a neutral or positive effect on blood sugar regulation.
Tissue repair & regeneration
50/100Rated 50/100Source typeUnclassified sourceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 7 underlying claimsEvidence indicates support for cellular repair and nerve regeneration.
Lean body mass support
72/100Rated 72/100Source typeEstablished referenceIndependent sources4Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 21 underlying claimsResearch suggests support for muscle growth, density, and body composition.
Inflammation reduction
72/100Rated 72/100Source typeEstablished referenceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 9 underlying claimsEvidence suggests a decrease in systemic inflammatory markers.
Immune modulation
60/100Rated 60/100Source typeSpecialist communityIndependent sources2Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 2 underlying claimsResearch suggests potential modulation of immune system activity.
Anti-fibrotic effects
95/100Rated 95/100Source typePeer-reviewed studyIndependent sources4Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 5 underlying claimsResearch suggests potential to slow tissue scarring, particularly in the liver.
Visceral fat reduction
72/100Rated 72/100Source typeEstablished referenceIndependent sources12Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 48 underlying claimsResearch suggests a reduction in deep abdominal fat, particularly in HIV-associated conditions.
Cardiovascular risk factors
50/100Rated 50/100Source typeUnclassified sourceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 8 underlying claimsResearch points to potential improvements in markers of heart health.
Cognitive function support
40/100Rated 40/100Source typeVendor / seller pageIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 20 underlying claimsStudies suggest potential benefits for memory, executive function, and brain structure.
Body image & well-being
85/100Rated 85/100Source typePeer-reviewed studyIndependent sources4Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 10 underlying claimsResearch indicates improvements in self-perception of body image and quality of life.
Growth hormone axis stimulation
50/100Rated 50/100Source typeUnclassified sourceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 29 underlying claimsResearch indicates it stimulates the natural release of growth hormone and IGF-1.
Sleep & recovery support
40/100Rated 40/100Source typeVendor / seller pageIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 8 underlying claimsStudies suggest support for sleep quality and physical recovery processes.
Mitochondrial & energy support
95/100Rated 95/100Source typePeer-reviewed studyIndependent sources2Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 3 underlying claimsStudies suggest improvements in cellular energy production.
Research examples
- Improves mitochondrial function (ATP production)
- Increased hepatic expression of oxidative phosphorylation genes
- Reduces fatigue
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How People Use It
1 reported routine — each line links to the source it came from.
From published sources
Routines as reported in peer-reviewed papers, clinical guidance, or vetted media — each linked to the source it came from.
SubQ
- Tesamorelin 1–1.4 mg + Ipamorelin 100–200 mcg 95/100Rated 95/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ source
mg vs mcg: one milligram (mg) equals 1,000 micrograms (mcg) — multiply by 1,000 going from mg to mcg, divide by 1,000 going from mcg to mg. Mixing the two up is a thousand-fold dosing error: 1 mg taken instead of 1 mcg is a 1,000× overdose; 1 mcg instead of 1 mg is a 1,000× underdose. Always double-check the unit label and the decimal place.
Honest expectations
What Tesamorelin doesn’t do
What the sourced research says it doesn’t do — as notable as what it does.
- Maintains neutral glycemic profile without increasing insulin resistance 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↵ source
Safety
Known Side Effects
Adverse effects reported in the research and by community use.
- Injection-site reactions (erythema, pruritus, haematomas)Mild 90/100Rated 90/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ peptidedosage.org
- Sore arms, legs, or musclesMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
- Severe Allergic ReactionsLifeThreatening 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
- CancerLifeThreatening 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
- High Blood SugarModerate 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
- Nausea or vomitingMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
- DizzinessMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
- Swelling of face, lips, mouth, tongue, or throatLifeThreatening 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
- Itching, skin rash, or hivesModerate 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
- Stomach crampsMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ webmd.com
- Arthralgia (joint pain) and myalgiaMild 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ excelmale.com
- Injection-site reactions and erythemaMild 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ excelmale.com
- Transient paresthesiaMild 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ excelmale.com
- Arthralgia and myalgia (Joint and muscle pain)Mild 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ excelmale.com
- Injection-site reactions (Erythema/Skin irritation)Mild 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ excelmale.com
- Paresthesia (Transient tingling/numbness)Mild 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ excelmale.com
- Paresthesias (tingling sensations)Mild 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ peptidepedia.org
- Carpal tunnel syndrome symptomsModerate 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ peptidepedia.org
- FlushingMild 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ peptidepedia.org
- Arthralgia (tesamorelin)Moderate 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ excelmale.com
- Injection site reactions (tesamorelin)Mild 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ excelmale.com
- Peripheral edema (tesamorelin)Moderate 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ excelmale.com
- Tesamorelin: arthralgia, injection site reactions, pain in extremity, peripheral edema, myalgiaMild 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ excelmale.com
Reported in research and community sources — not exhaustive. Discontinue use and consult a healthcare professional if side effects occur.
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Technical Details (sequence & mechanism — click to expand)
Mechanism of Action
Tesamorelin is an N-terminally modified synthetic analog of growth hormone releasing hormone (GHRH) that stimulates pituitary GH release, raising IGF-1 and selectively mobilizing visceral adipose tissue. It is FDA-approved (Egrifta) to reduce excess visceral abdominal fat in HIV-associated lipodystrophy.
Evidence
Research Citations (8)
Every claim above traces back to a source you can check — here are 8 of them.
- Source
Spotlight on tesamorelin in HIV-associated lipodystrophy.
Review2011 Key study 88/100Rated 88/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Egrifta (tesamorelin) prescribing information
Guideline2020 90/100Rated 90/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
PubChem - Compound - Tesamorelin
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Tesamorelin: a review of its use in the management of HIV-associated lipodystrophy.
2011 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Non-clinical pharmacology and safety evaluation of TH9507, a human growth hormone-releasing factor analogue.
2007 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Tesamorelin: A hope for ART-induced lipodystrophy.
2011 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Effects of tesamorelin, a growth hormone-releasing factor, in HIV-infected patients with abdominal fat accumulation: a randomized placebo-controlled trial with a safety extension.
2010 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Tesamorelin - an overview | ScienceDirect Topics
72/100Rated 72/100Source typeEstablished referenceIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
Timeline
History & Milestones
Key moments in Tesamorelin’s research and regulatory timeline — sourced and dated.
- Spotlight on tesamorelin in HIV-associated lipodystrophyPublicationDec 1, 2011Related:Tesamorelin
News
Latest on Tesamorelin
Dated, sourced reporting that mentions Tesamorelin.
New York Times sorts peptide-therapy hype from evidence across skincare, muscle-building, and longevity
A November 2025 New York Times explainer takes a skeptical consumer lens to the peptide-therapy craze, separating the few uses with reasonable evidence (topical GHK-Cu and Matrixyl-type peptides in skincare) from the largely unproven injectable and "biohacking" market (BPC-157, TB-500, epitalon, semax, selank). Dermatologists frame cosmetic peptides as "sidekicks, not hero ingredients," while endocrinologists warn that growth-hormone-releasing peptides like sermorelin and tesamorelin carry the same long-term risks as HGH — diabetes, certain cancers, and acromegaly. The piece notes that most longevity claims rest on cell-culture or animal data only, and that "research-grade" products have no quality controls.
NuScience Peptides LLC
The FDA issued a warning letter to NuScience Peptides LLC for marketing unapproved injectable peptide drugs, including GLP-1/GLP-2/GLP-3 products and other peptides, on its website. The agency determined these products are unapproved new drugs under the FD&C Act. FDA warned that failure to correct the violations could lead to seizure or injunction.
Revive Rx LLC dba Revive Rx Pharmacy (Houston, TX) 483 issued 02/07/2025
FDA's Dallas district office inspected Revive Rx LLC (Houston, TX) between January 27 and February 7, 2025 and issued a Form 483 citing sterile-failure observations — products exposed to sub-ISO 5 air and microbial contamination (mold and spore-forming bacteria) in production areas. The 483's product list includes Hexarelin 6 mg per Vial for Injection among the drugs the compounding pharmacy produced, alongside sermorelin and tesamorelin. The document is inspectional observations, not a final agency determination.
Peak Performance Peptides
The FDA issued a warning letter to Peak Performance Peptides, an online seller, for marketing unapproved injectable peptide drugs including retatrutide, semaglutide, PT-141, tesamorelin, and SS-31 via its website. The agency stated these products are unapproved new drugs under the FD&C Act and warned of possible seizure or injunction if violations are not corrected. The letter highlights ongoing FDA scrutiny of grey-market peptide sellers.
TXP Innovations LLC dba Tex Peptides
The FDA issued a warning letter to TXP Innovations LLC (dba Tex Peptides) after reviewing its website in July 2026 and finding it marketed unapproved injectable peptide drugs, including semaglutide, tirzepatide, retatrutide, SS-31 (elamipretide), tesamorelin, and PT-141 (bremelanotide). The agency deemed these unapproved new drugs under section 505(a) of the FD&C Act. The letter warns that continued violations could trigger seizure or injunction. It underscores FDA's ongoing crackdown on unapproved peptide products sold directly to consumers online.
Wondering how Tesamorelin pricing compares across suppliers? Our original market data shows the full picture.
See the State of the Peptide Market 2026 →Related on The Health Stacks
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