Titus Thorne

Last Updated April 1, 2022

Titus Thorne

 April 1, 2022

Researchers familiar with the potential benefits of tesamorelin may be looking for a more comprehensive tesamorelin review — including benefits, dosage, side effects and more. 

In this full tesamorelin review, we’ll give you an overview of this peptide and explain exactly what it is and how it works. We will also discuss tesamorelin’s legal status, safety profile, and how it has been dosed in past experiments. 

Researchers interested in pursuing tesamorelin research will find full details of a reliable, cost-effective tesamorelin vendor at the end of this guide. 

Let’s begin!

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What is Tesamorelin?

Tesamorelin acetate, also known by its trade name “Egrifta” or simply as “tesamorelin”, is a synthetic analogue of human growth hormone-releasing hormone (GHRH). It’s used to stimulate the manufacture (synthesis) and release of growth hormone (GH) in the human body [1].

As an analogue, tesamorelin has similar physical properties to GHRH (also known as growth hormone-releasing factor) but is actually a peptide. Peptides are chains of amino acids — the substances that make up proteins. They’re basically small proteins that do not have the 3D shape that proteins have. Tesamorelin is made up of a chain of 44 amino acids as well as a trans-3-hexenoic acid group [2]. The extra trans-3-hexenoic acid group helps make tesamorelin more stable and longer-lasting than natural GHRH.

Tesamorelin was developed by a Canadian company called Theratechnologies to treat a condition called lipodystrophy that’s common in patients with HIV who receive long-term antiretroviral therapy (ART) [3]. Lipodystrophy sufferers experience an increase in the amount of abdominal fat — a condition that tesamorelin helps improve.

Why does growth hormone (GH) matter?

Growth hormone is a powerful anabolic hormone and is one of the most important chemical signals for the body to build and repair tissue. It’s involved in many processes, from creating new muscle to repairing torn tissue and even breaking down fat. Serum levels of GH in the body are variable and are dependent on such factors as age, level of fitness, gender and body composition.

Because of its role in creating new tissue, GH is plentiful in the body during childhood and adolescence, but decreases with age. This can affect athletic performance, mobility and the length of time it takes to recover from an injury. Tesamorelin and other GHRH anaolgues stimulate the pituitary gland and encourage the synthesis and release of endogenous GH in the body [4].

While there is no scientific evidence that injecting biosynthetic forms of GH (tesamorelin included) increases athletic performance, all synthetic GHRH analogues and peptides are banned from sports, indicating that they are beneficial to that end [4].


Does Tesamorelin Actually Work?

Yes, tesamorelin has been evaluated by the United States Food & Drug Administration (FDA) and is an approved treatment for HIV-related lipodystrophy [1]. Numerous scientific studies have shown that tesamorelin is a safe and effective treatment for adults with HIV.

Tesamorelin’s research-backed benefits include its ability to increase lean muscle area and decrease muscle fat in adults with HIV [5], and its ability to lower levels of visceral adipose tissue (VAT) in patients with HIV-related lipodystrophy [6]. Studies have shown that tesamorelin is able to trigger lipolysis (fat burning) in lipohypertrophy patients [7].

Tesamorelin’s effectiveness in treating non-HIV patients has not been evaluated. There is no scientific evidence documenting an improvement in athletic performance following tesamorelin supplementation. However, it has been shown to decrease levels of an osmolyte linked to Alzheimer disease — MI (myo-inositol) — in healthy adults, while raising levels of GABA (Gamma aminobutyric acid) [8].

Is Tesamorelin Legal?

Researchers interested in working with tesamorelin may be curious about its legal status; is tesamorelin legal?

In short, yes.

Tesamorelin is available as a prescription medication for patients with HIV-related lipodystrophy and is available from registered pharmacies across the U.S. and worldwide [9].

While tesamorelin is not approved to be taken as a dietary supplement or for cosmetic use, researchers are free to buy tesamorelin online as a reference material.

We repeat: For research purposes, tesamorelin is an unregulated compound that is widely available.

Tesamorelin Before and After

What is the effect of tesamorelin before and after?
According to results from two well designed, 26-week clinical trials in patients with HIV-associated central fat accumulation, tesamorelin therapy was associated with “significant improvements in body composition measures such as waist circumference and trunk fat” [3].

In a separate study into the effects of tesamorelin on people living with HIV, researchers found that tesamorelin was “associated with significantly greater increases in density of four truncal muscle groups,” “in total area” and “in the lean muscle area,” compared to a placebo [5].

Although World Anti-Doping Agency (WADA) regulations prohibit the use of growth hormone-releasing hormones (GHRHs) such as tesamorelin in sports, we simply do not have the evidence that tesamorelin can build muscle, burn fat or enhance athletic performance in healthy individuals [10].

Tesamorelin Benefits and Uses

As tesamorelin has been approved by the FDA, there’s been lots of research on this peptide and we know quite a lot about it. Here’s what the research says about how tesamorelin might benefit subjects and how it may be used in an experimental setting.

Increasing growth hormone

Tesamorelin has been found to be very effective at increasing the rate at which growth hormone is synthesized and released in the body [4]. Studies have shown that it can increase lean muscle tissue in HIV-positive adults [5].

Fat loss

One of the primary uses of tesamorelin is to treat HIV-afflicted individuals that suffer from lipodystrophy, a condition that causes the accumulation of fat in the upper back and around the stomach [11]. This increase in body fat can cause body image issues as well as increase the risk of heart attack and other cardiovascular diseases.

While its exact mechanism of action is unclear, tesamorelin has been shown to trigger lipolysis (fat loss) in individuals with this condition. In HIV-infected patients with lipodystrophy and excess body fat around the abdomen, tesamorelin was found to significantly decrease subcutaneous adipose tissue (body fat) by 15 percent [12]. In contrast, the control group participants had a 5 percent increase in body fat. Tesamorelin was also found to improve insulin resistance and cholesterol.

More importantly, patients’ scores on body image improved significantly in the tesamorelin group, with subjects perceiving their bodies as more attractive following treatment [12].
These results are not isolated; they’ve been confirmed by a review of 4 randomized controlled trials [13]. The research suggests that tesamorelin is actually 4 times more effective in reducing adipose tissue (body fat) than all other treatments combined [14].

Nerve damage

Injury, surgery and even diabetes can cause peripheral nerve damage and result in the loss of motor and sensory function in various parts of the body. Typically, there is very little that can be done about this; nerve cells are very difficult to regenerate.

However, some research has shown that tesamorelin and other GHRH secretagogues may actually be able to improve the extent to which nerves can regenerate themselves. Tesamorelin is currently being tested for this and is one of the more promising treatment options [15].

Improved cognitive function

There is also some promising research about the role that GHRH analogues, including tesamorelin, may play in improving cognitive function for individuals. A large control trial out of Washington state found evidence that tesamorelin may increase levels of some neurotransmitters in the brain that are associated with better cognitive function [8]. More research is needed to confirm these findings.

review tesamorelin

Tesamorelin Side Effects

Adverse side effects are rare with tesamorelin in adults with HIV, but as with most peptides, there is a possibility of side effects. The risk of tesamorelin side effects appears to increase in line with dosage.

Some of the more commonly reported side effects include:

  • Swelling and itching at or around the injection site
  • Muscular aches and pain
  • Diarrhea
  • Sweating

Less common but more serious side effects include:

  • Diarrhea with fever and dehydration
  • Congestive heart failure
  • Shortness of breath
  • Muscle or joint pain
  • Numbness, tingling, swelling in arms or legs

One side effect of tesamorelin is that it may cause glucose intolerance and increase the risk of type 2 diabetes mellitus. The drug is contraindicated during pregnancy [11].
There is a possibility of allergic reactions to all medications. Patients or research subjects who experience any persisting or serious side effects after taking tesamorelin should contact their primary care physician immediately.

Tesamorelin Dosage Guide

Tesamorelin, like all drugs, should be used under the guidance of a qualified health professional such as a doctor or a medical researcher. Patients who are prescribed tesamorelin should follow the directions of their doctor to administer tesamorelin properly and at the right dose.

For the treatment for HIV-related lipodystrophy, tesamorelin is typically dosed as follows:

  • One subcutaneous injection, daily
  • At least 90 minutes after eating
  • Preferably at night, before sleep.
  • Each injection dosed at 2 mg
  • Five days per week

Despite strong research interest in the application of tesamorelin to improve athletic performance, there is no evidence that growth hormone supplementation improves athletic performance, lean muscle gain or fat loss in healthy individuals. According to J G Macintyre, “anecdotal reports (of GH use) have been equivocal, with some individuals reporting spectacular results while others report no change.” [4].

Where to Buy Tesamorelin Online? | 2022 Guide

Tesamorelin is legally available for researchers to buy online.

The main challenge facing researchers is finding a reliable vendor that sells high-quality tesamorelin at reasonable prices. Our recommended vendor is Peptide Sciences. They publish independent, third-party test results for all of these products, which offers clarity and transparency about the purity of their peptides.

In addition to that, Peptide Sciences also:

  • Manufactures their product in the US. Peptide Sciences works with a variety of suppliers to offer their customers the highest possible quality of peptides. 
  • Offers convenient shipping. Orders within the US are received within 2 to 3 days. International orders can take up to 10 days;
  • Accepts a range of secure, convenient payment methods. Researchers can use all major credit and debit cards when they place an order with this vendor. Peptide Sciences also accepts most cryptocurrencies including Bitcoin and Ethereum.
  • Offers great customer service. In the rare event that researchers experience any problems with their orders or just want to ask a question, Peptide Sciences can be contacted via phone or email.

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How to Order Tesamorelin | Country By Country

Patients with a prescription for tesamorelin can buy this drug from any pharmacy. Researchers can pay significantly less for tesamorelin by ordering online through Peptide Sciences. The beauty of Peptide Science is that they deliver internationally. No matter where in the world researchers are located, they can order tesamorelin online from Peptide Sciences.

The process of ordering tesamorelin online is simple. Researchers need a valid email address, a shipping address, and an accepted method of payment such as a debit or credit card. Adding personal data and payment information to Peptide Sciences’ secure website takes just a few moments and orders are generally dispatched within 24 hours.

While there are other vendors that offer tesamorelin, we’ve found that Peptide Science offers the best value for money and reliable, cost-effective delivery times. When ordering tesamorelin online for the first time, researchers should place a small test order to establish whether the vendor ships an authentic product without fillers or additives.

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Tesamorelin Review | Verdict

Researchers are very excited about tesamorelin.

Tesamorelin is an FDA-approved lipodystrophy treatment that has been proven to help HIV patients reduce stubborn belly fat. Several high-quality, randomized, placebo-controlled studies have reported that subjects lose significant amounts of fat when they take this peptide.

While studies into tesamorelin effect in healthy individuals are lacking, this drug’s clear impact on lipid metabolism makes it an ideal candidate for further research. Researchers are advised to contact Peptide Sciences before placing an order for tesamorelin.

Buy Tesamorelin from our #1 recommended vendor...


  1. Grunfeld C, Dritselis A, Kirkpatrick P. Tesamorelin. Nat Rev Drug Discov. 2011 Feb;10(2):95-6. doi: 10.1038/nrd3362. PMID: 21283099.
  2. Food and Drug Administration (2010). Chemistry Reviews: Application 22-505. https://www.accessdata.fda.gov/drugsatfda_docs/nda/2010/022505Orig1s0
  3. Dhillon S. Tesamorelin: a review of its use in the management of HIV-associated lipodystrophy. Drugs. 2011 May 28;71(8):1071-91. doi: 10.2165/11202240-000000000-00000. PMID: 21668043.
  4. Macintyre JG. Growth hormone and athletes. Sports Med. 1987 Mar-Apr;4(2):129-42. doi: 10.2165/00007256-198704020-00004. PMID: 3299611.
  5. Adrian, S., Scherzinger, A., Sanyal, A. et al. The Growth Hormone Releasing Hormone Analogue, Tesamorelin, Decreases Muscle Fat and Increases Muscle Area in Adults with HIV. J Frailty Aging 8, 154–159 (2019). https://doi.org/10.14283/jfa.2018.45
  6. Dhillon, S. Tesamorelin. Drugs 71, 1071–1091 (2011). https://doi.org/10.2165/11202240-000000000-00000
  7. Clinical Review Report: Tesamorelin (Egrifta) [Internet]. Ottawa (ON): Canadian Agency for Drugs and Technologies in Health; 2016 Aug. Executive Summary. Available from: https://www.ncbi.nlm.nih.gov/books/NBK539124/
  8. Friedman SD, Baker LD, Borson S, et al. Growth Hormone–Releasing Hormone Effects on Brain γ-Aminobutyric Acid Levels in Mild Cognitive Impairment and Healthy Aging. JAMA Neurol. 2013;70(7):883–890. doi:10.1001/jamaneurol.2013.1425
  9. Egrifta Prices, Coupons & Patient Assistance Programs – Drugs.com. (2021). Retrieved 14 May 2021, from https://www.drugs.com/price-guide/egrifta
  10. Knoop A, Thomas A, Fichant E, Delahaut P, Schänzer W, Thevis M. Qualitative identification of growth hormone-releasing hormones in human plasma by means of immunoaffinity purification and LC-HRMS/MS. Anal Bioanal Chem. 2016 May;408(12):3145-53. doi: 10.1007/s00216-016-9377-3. Epub 2016 Feb 15. PMID: 26879649; PMCID: PMC4830873.
  11. Patel, Akash et al. “Tesamorelin: A hope for ART-induced lipodystrophy.” Journal of pharmacy & bioallied sciences vol. 3,2 (2011): 319-20. doi:10.4103/0975-7406.80763
  12. Falutz J, Allas S, Blot K, Potvin D, Kotler D, Somero M, Berger D, Brown S, Richmond G, Fessel J, Turner R, Grinspoon S. Metabolic effects of a growth hormone-releasing factor in patients with HIV. N Engl J Med. 2007 Dec 6;357(23):2359-70. doi: 10.1056/NEJMoa072375. PMID: 18057338.
  13. Canadian Agency for Drugs and Technologies in Health (2016). Clinical review report: Tesamorelin (Egrifta). https://www.ncbi.nlm.nih.gov/books/NBK539124/
  14. Mangili, A., Falutz, J., Mamputu, J. C., Stepanians, M., & Hayward, B. (2015). Predictors of treatment response to tesamorelin, a growth hormone-releasing factor analog, in HIV-infected patients with excess abdominal fat. PloS one, 10(10).
  15. Tuffaha, S. H., Singh, P., Budihardjo, J. D., Means, K. R., Higgins, J. P., Shores, J. T., … & Brandacher, G. (2016). Therapeutic augmentation of the growth hormone axis to improve outcomes following peripheral nerve injury. Expert opinion on therapeutic targets, 20(10), 1259-1265.

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