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HGH vs Tesamorelin: What the Research Shows

HGH and Tesamorelin side by side: what they are, how they are regulated and what is still unknown.

Medically reviewed by Juan Pablo Frías, MD · · DisclosureUpdated
Recombinant growth hormoneFDA approved (prescription only)HGHRecombinant human growth hormone, FDA-approved by prescription; in a randomized trial, 4 weeks of supraphysiological dosing did not improve power output or oxygen uptake.[14]Growth hormone+39% searchesGHRH analogFDA approved (Egrifta)TesamorelinFDA-approved GHRH analog (Egrifta) for excess abdominal fat in HIV-associated lipodystrophy; visceral fat fell 15.2% versus a 5.0% rise with placebo in a randomized trial.[15]Growth hormone+188% searches
Quick verdict

Where the research points

Summary of studies, not a recommendation

Consider HGH if…

  • you want products with an FDA label: Genotropin (somatropin) is indicated for children with growth failure from inadequate growth hormone secretion[3]
  • you want randomized data on lean mass in older men: Lean body mass increased with GH alone and with GH plus testosterone versus placebo; total body fat decreased only with the combination.[16]

Consider Tesamorelin if…

  • you want a product with an FDA label: Egrifta is indicated to reduce excess abdominal fat in HIV-infected adults with lipodystrophy and is not indicated for weight loss management[9]
  • you want randomized data in HIV-associated lipodystrophy: Visceral adipose tissue fell 15.2% with tesamorelin and rose 5.0% with placebo by the end of treatment.[15]

What they have in common

  • Growth hormone is prohibited by WADA at all times, in and out of competition[2]
  • WADA prohibits GHRH and its analogues at all times; its list names CJC-1295, sermorelin and tesamorelin[2]
Both are prohibited in tested sport (WADA). Status labels come from public FDA and WADA records; see the sources below.
Side by side

Spec comparison

Showing 10 of 13 fields where the two differ. Category, PCAC vote, Jul 2026, Evidence strength are the same or both unknown.

FieldHGHTesamorelin
ClassRecombinant growth hormoneGHRH analog
Also calledGH, growth hormone, generic HGH, IUtesa, Egrifta
FDA statusFDA approved (prescription only)FDA approved (Egrifta)
WADAProhibited by WADA (S2.2.3)Growth hormone and its analogues and fragments are prohibited at all times (S2.2.3).Prohibited by WADA (S2.2.4)Tesamorelin is named as a GHRH analogue in S2.2.4 (growth hormone releasing factors), prohibited at all times. Tesamorelin is also an FDA-approved medicine; an athlete would need a therapeutic use exemption.
Anti-doping detectionNone reportedanti-doping literature, as of 2 Oct 2026
  • A urine assay detects CJC-1295 and other GHRH analogues at very low concentrations.PMID 35298973
  • Labs expect GHRH analogues like CJC-1295 to be hard to find because of tiny urine concentrations; the study reports no detections in routine anti-doping samples.PMID 34665524
Half-life0.4 hours IV; 3.0 hours subcutaneousintravenous (normal adults); subcutaneous (GHD adults), Genotropin · FDA label (Genotropin)11 minutessubcutaneous (EGRIFTA WR 1.28 mg) · FDA label (Egrifta WR)
Human studies we summarised13 human (13 randomized or controlled) of 20 summarised11 human (11 randomized or controlled) of 12 summarised
Typical study doses
US searches per month74,000 · +39% searches165,000 · +188% searches
Named in FDA warning letters, 2026Not in the letters we trackYes (24 Aug 2026)

Bracketed values are pending a sourced figure. Legal data reflects the regulatory events in our tracker.

Taken together?

HGH and Tesamorelin together

People also search for this pair as a stack. The stack page covers timing and interaction questions as they are sourced. Evidence for the combination: No studies tested these together (PubMed search: 7 results, 2 Oct 2026).

Open the stack page
StackHGH + Tesamorelin, taken as separate injectionsStack page

Sources

  1. 1FDA warning letters to five research-peptide sellersFDA warning letter (NuScience Peptides; 1 of 5) · 2026fda.govAccessed 2 Oct 2026
  2. 2World Anti-Doping Code International Standard Prohibited List 2026World Anti-Doping Agency · 2026wada-ama.orgAccessed 2 Oct 2026
  3. 3GENOTROPIN (SOMATROPIN) KIT [PFIZER LABORATORIES DIV PFIZER INC]FDA label (Genotropin), DailyMed · current labeldailymed.nlm.nih.govAccessed 2 Oct 2026
  4. 4Effect of growth hormone on aging connective tissue in muscle and tendon: gene expression, morphology, and function following immobilization and rehabilitation.Journal of applied physiology (Bethesda, Md. : 1985) · 2014PMID 24235105Accessed 2 Oct 2026
  5. 5Impact of GH replacement therapy on sleep in adult patients with GH deficiency of pituitary origin.European journal of endocrinology · 2013PMID 23447518Accessed 2 Oct 2026
  6. 6Local administration of growth hormone stimulates tendon collagen synthesis in elderly men.Journal of applied physiology (Bethesda, Md. : 1985) · 2012PMID 22961272Accessed 2 Oct 2026
  7. 7An antibody-free, ultrafiltration-based assay for the detection of growth hormone-releasing hormones in urine at low pg/mL concentrations using nanoLC-HRMS/MS.Journal of pharmaceutical and biomedical analysis · 2022PMID 35298973Accessed 2 Oct 2026
  8. 8Advances in the detection of growth hormone releasing hormone synthetic analogs.Drug testing and analysis · 2021PMID 34665524Accessed 2 Oct 2026
  9. 9EGRIFTA WR (TESAMORELIN) KIT [THERATECHNOLOGIES INC.]FDA label (Egrifta WR), DailyMed · current labeldailymed.nlm.nih.govAccessed 2 Oct 2026
  10. 10The effect of growth hormone-releasing hormone on cognition and brain connectivity in adults with cognition ranging from normal to mild cognitive impairment.eNeurologicalSci · 2026PMID 42382101Accessed 2 Oct 2026
  11. 11Effects of tesamorelin on non-alcoholic fatty liver disease in HIV: a randomised, double-blind, multicentre trial.The lancet. HIV · 2019PMID 31611038Accessed 2 Oct 2026
  12. 12The Growth Hormone Releasing Hormone Analogue, Tesamorelin, Decreases Muscle Fat and Increases Muscle Area in Adults with HIV.The Journal of frailty & aging · 2019PMID 31237318Accessed 2 Oct 2026
  13. 13PubMed search: (somatropin[tiab] OR "recombinant human growth hormone"[tiab] OR "recombinant growth hormone"[tiab] OR rhGH[tiab] OR "growth hormone therapy"[tiab] OR "growth hormone treatment"[tiab] OR "growth hormone replacement"[tiab] OR "growth hormone administration"[tiab] OR "GH therapy"[tiab] OR "GH treatment"[tiab] OR "GH replacement"[tiab] OR "GH administration"[tiab] OR "growth hormone injection"[tiab] OR "growth hormone injections"[tiab] OR "growth hormone supplementation"[tiab]) AND (tesamorelin[tiab] OR Egrifta[tiab] OR TH9507[tiab] OR "TH-9507"[tiab])PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  14. 14Short-term administration of supraphysiological recombinant human growth hormone (GH) does not increase maximum endurance exercise capacity in healthy, active young men and women with normal GH-insulin-like growth factor I axes.The Journal of clinical endocrinology and metabolism · 2005PMID 15784718Accessed 2 Oct 2026
  15. 15Metabolic effects of a growth hormone-releasing factor in patients with HIV.The New England journal of medicine · 2007PMID 18057338Accessed 2 Oct 2026
  16. 16The effects of growth hormone and/or testosterone in healthy elderly men: a randomized controlled trial.The Journal of clinical endocrinology and metabolism · 2006PMID 16332938Accessed 2 Oct 2026

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