Hexarelin and tesamorelin are injectable peptides that make the pituitary gland release more of the body’s own growth hormone (GH). The hexarelin peptide is not an FDA-approved drug for any use. Tesamorelin (Egrifta) is a prescription medicine approved for one condition: excess abdominal fat in adults with HIV-associated lipodystrophy. Neither has proven performance benefits, and both are prohibited at all times under the World Anti-Doping Code. [1,2,3,4]
Key takeaways
- Both peptides raise the body’s own growth hormone; that is the hormonal effect consistently documented in humans. [2,5,6]
- The performance benefits claimed online for these peptides are unproven, and GH itself did not improve strength or exercise capacity in fit young adults. [4,7]
- Tesamorelin’s approved use is visceral belly fat in HIV-associated lipodystrophy; hexarelin has no FDA-approved product and no FDA-reviewed safety data. [1,2]
- Both are named on the 2026 WADA Prohibited List (S2.2.4) and prohibited in and out of competition; a prescription is not an exemption. [3,8]
Important for competitive athletes
If you are tested under the World Anti-Doping Code, at elite, junior or masters level, hexarelin and tesamorelin are prohibited at all times, and a prescription does not make them permitted. Check any medication on GlobalDRO.com before you use it. [3,8]
What are hexarelin and tesamorelin? Growth hormone secretagogues explained
Hexarelin and tesamorelin are growth hormone secretagogues: synthetic peptides that signal the pituitary gland to release GH, which in turn raises insulin-like growth factor 1 (IGF-1), the protein that carries most of GH’s effects on bone and muscle. They are not growth hormone itself, and both are given by injection. [2,5,8]
Tesamorelin is a synthetic analogue of growth hormone-releasing hormone (GHRH). [2] Hexarelin is a GH-releasing peptide (GHRP), grouped with GHRP-2, GHRP-6 and ipamorelin among the growth hormone secretagogues. A 2026 review of these peptides lists blood-sugar disturbances among their reported adverse effects and describes concerns about tumor growth as biologically plausible but unproven. [4] Background: sermorelin vs HGH and IGF-1.
Hexarelin peptide: is it really a strength builder? What the research shows
No. No human study shows that the hexarelin peptide builds muscle, increases strength, burns fat or speeds recovery. Human research consists of small hormone-release studies; in the longest one, 16 weeks of twice-daily injections did not change body fat, lean mass or bone density, while the GH response to each dose weakened. [5]
- It raises GH after each dose, and it does so by intravenous, subcutaneous, intranasal and oral routes in healthy people. [5]
- It can raise prolactin and cortisol, adverse effects reported across this class of peptides. [4]
- The GH response fades. Over 16 weeks the GH released by a test injection fell from 19.1 to 10.5 micrograms per liter per hour, recovered four weeks after stopping, and IGF-1 never changed. [5]
A 2026 review of GH-axis peptides sold as research compounds, hexarelin included, found the performance and body-recomposition benefits claimed online unproven and the products carrying endocrine, metabolic and product-quality risks. [4]
Tesamorelin: a fat buster? What it is approved for
Tesamorelin, sold as Egrifta SV, is FDA-approved for one use: reducing excess abdominal fat in HIV-infected adults with lipodystrophy. The label states it is not indicated for weight loss because its effect is weight neutral. [2]
- In 412 people with HIV, 26 weeks of daily tesamorelin cut visceral fat, the deep fat around the organs, by 15.2 percent versus a 5.0 percent rise on placebo; triglycerides fell 50 mg/dL and IGF-1 rose 81 percent. [6]
Three limits apply outside the approved group: the effect is specific to visceral fat and does not reduce weight; the label says long-term cardiovascular safety has not been established and treatment should be reconsidered if visceral fat has not fallen; and no trial has studied athletes or lean adults, so body-composition use in that group is off-label and untested. [2] See why only FDA-approved peptides belong in a treatment plan.
Does tesamorelin help build muscle?
Not in any way shown to matter for performance. Its pivotal trial was designed around visceral fat, lipids and IGF-1, not muscle or strength, and the muscle and performance benefits promoted online for GH-axis peptides remain unproven. [4,6]
Because both peptides act by raising GH, trials of GH in fit people are the closest evidence. A systematic review of 27 study samples (303 GH recipients, mean age 27) found lean mass up 2.1 kg but no apparent gain in strength or exercise capacity, plus more swelling and fatigue, and concluded that claims that GH enhances physical performance are not supported by the scientific literature. [7] Tesamorelin bodybuilding protocols are marketed for lean muscle, but a 2026 review comparing online self-administration protocols with the clinical evidence found their performance and recomposition benefits unproven. [4]
Hexarelin vs tesamorelin: how they compare (and where sermorelin and ipamorelin fit)
The two differ in mechanism, regulatory status and evidence, but share the same anti-doping status and the same lack of proven performance benefit. [3,4]
| Hexarelin | Tesamorelin | |
|---|---|---|
| Drug class | GH-releasing peptide (secretagogue) [4] | GHRH analogue [2] |
| FDA status | No approved product [1] | Approved (Egrifta SV) for excess abdominal fat in HIV-associated lipodystrophy [2] |
| Human efficacy evidence | Short-term GH release only; no body-composition change in 16 weeks [5] | Randomized trial in HIV: visceral fat down 15.2% vs up 5.0% on placebo over 26 weeks [6] |
| WADA 2026 | Prohibited at all times, S2.2.4 (as examorelin) [3] | Prohibited at all times, S2.2.4 [3] |
Is hexarelin better than ipamorelin, or sermorelin better than hexarelin? There is no evidence base for choosing on results: a 2026 review places sermorelin, ipamorelin and hexarelin among the GH-axis peptides common in online self-administration protocols, with unproven performance benefits, and all of them sit in the same prohibited class S2.2.4 of the WADA list. See sermorelin therapy and the ipamorelin and CJC-1295 compounding restrictions. [3,4]
Can athletes benefit from hexarelin or tesamorelin? What WADA and USADA rules say
For a tested athlete, no. The 2026 WADA Prohibited List names tesamorelin among the GHRH analogues and hexarelin (as examorelin) among the GH-releasing peptides in class S2.2.4, growth hormone releasing factors. Everything in class S2 is prohibited at all times, in and out of competition, and is a non-Specified Substance. [3]
So are peptides banned in sports? For this class, yes. A clinic prescription is not a defense: USADA states that growth hormone releasing factors are prohibited at all times, that some wellness clinics prescribe drugs that make the body release more GH, many of them investigational drugs not approved by the FDA, and that athletes should check any prescribed medication on GlobalDRO.com. It also notes that the GH rules apply to elite, junior and masters-level athletes alike. [8] College and professional leagues run their own testing programs, so check the rules of every organization you compete under.
Is tesamorelin FDA approved? Is hexarelin legal?
Tesamorelin is FDA-approved only as Egrifta SV, a prescription medicine for excess abdominal fat in adults with HIV-associated lipodystrophy. Hexarelin is not FDA-approved for any use and has no product listed on DailyMed. USADA notes that many compounds advertised to raise GH are investigational drugs not yet approved by the FDA. [1,2,8]
Peptides sold online as “research compounds” come from unregulated supply chains, and their actual composition and dose are uncertain. [4] More in regulatory oversight and controlled-substance classification.
Safety first: side effects, risks and who should not use these peptides
Both peptides raise GH and IGF-1, so they carry the side effects of a stimulated GH axis: fluid retention, joint and muscle pain, carpal tunnel syndrome, higher blood sugar and injection-site reactions. Tesamorelin has an FDA label listing contraindications and warnings; hexarelin has no FDA-reviewed safety information at all. [1,2,4]
Tesamorelin side effects
The most common adverse reactions in the Egrifta trials, each in more than 5 percent of patients, were joint pain, injection-site redness and itching, pain in the arms or legs, swelling of the legs and feet, and muscle pain. The label warns of fluid retention including carpal tunnel syndrome, glucose intolerance or diabetes, hypersensitivity reactions such as rash and hives, an increased risk of tumor growth, and increased mortality in acute critical illness. IGF-1 rose above the normal range in 47 percent of patients after 26 weeks, and the effects of prolonged elevation are unknown. [2] In the pivotal trial, overall adverse events did not differ significantly from placebo, but more tesamorelin patients withdrew because of an adverse event. [6]
Hexarelin side effects
With no regulatory review, hexarelin’s profile comes only from small studies and its drug class. In the longest human study, the GH response weakened with repeated dosing. [5] Reviews of this class list prolactin and cortisol elevations, appetite changes, blood-sugar disturbances, fluid retention, muscle and joint pain and injection-site reactions, and warn that the composition and dose of products from unregulated suppliers are uncertain. [4]
Is tesamorelin safe? Does it cause cancer?
The trials, up to 52 weeks long, did not show that tesamorelin causes cancer, but they were not designed to answer that question. The label treats it as a real concern: GH is described as a known growth factor, tesamorelin is contraindicated in active cancer, people with a cancer history should start only after careful evaluation, and treatment should stop at any sign of recurrence. The label also states that the effects of prolonged IGF-1 elevation are unknown and calls for IGF-1 monitoring. [2] A 2026 review describes the cancer concern with GH-axis peptides as biologically plausible but unproven. [4]
Who should not use them
The tesamorelin label lists four contraindications: a disrupted hypothalamic-pituitary axis (after pituitary surgery, pituitary tumor, hypopituitarism, head irradiation or head trauma), active cancer, known allergy to tesamorelin or its ingredients, and pregnancy, because the drug could harm the fetus. The label also advises against breastfeeding during treatment. [2] Hexarelin has no contraindication list because it has never been reviewed; the same cautions apply, and the absence of data is itself a reason not to use it. Tested athletes should use neither.
Monitoring and the prescription requirement
Tesamorelin is a prescription medicine, and any peptide therapy must be prescribed and monitored by a licensed clinician after an evaluation with lab work. The label requires glucose to be evaluated before and during treatment, IGF-1 to be monitored with discontinuation considered if it stays persistently high, and the benefit of continuing to be reconsidered if visceral fat has not fallen. If a rash, hives or other sign of an allergic reaction follows an injection, stop the drug and seek medical attention immediately. [2]
Evidence-based options for athletes instead of unapproved peptides
For strength, body composition or recovery, hormones are not the evidence-based route. GH itself, the hormone these peptides raise, increased lean mass in fit young adults without improving strength or exercise capacity, and it caused more swelling and fatigue. [7] Training, nutrition and recovery remain the foundation.
If you suspect a genuine hormone problem, the right step is testing, not self-prescribing: adult growth hormone deficiency from pituitary disease, radiation or trauma is a recognized condition with approved treatment, and even then USADA says an athlete needs a Therapeutic Use Exemption. [8] Learn what growth hormone (HGH) testing involves, see our overview of peptides for recovery and muscle growth, and if you have symptoms of low testosterone read about TRT and sports performance, checking any hormone treatment on GlobalDRO.com before use in sport.
Ready to level up? Talk to a clinician first
At Advanced TRT Clinic, we believe the best version of you starts with the facts. If you are curious about growth hormone peptides, the right first step is a medical evaluation with lab work: a clinician can check whether there is a real hormone problem to treat, explain which options are FDA-approved, and tell you what any treatment would mean for your sport. Book a consultation or explore our services.
