watchAnecdotalFeb 24, 2026
Steroid stigma contrast
Public discussion often contrasts peptides with steroids and growth hormone, which can blur important legal, safety, and evidence distinctions.
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Source HGH
Somatropin · Human Growth Hormone · rHGH
Growth HormoneApprovedApprovedPrescriptionSubQIM
Popular for:Growth hormone deficiency, anti-aging, body composition
812
Registered Trials
946
Trial Publications
9,318
PubMed References
Approved
Evidence Level
Overview
Human Growth Hormone (HGH), also known as somatropin, is a 191-amino acid single-chain polypeptide produced by the anterior pituitary gland. The short version: people usually care about it for growth hormone deficiency, anti-aging, body composition, but the strength of the evidence depends heavily on indication and study type.
Human Growth Hormone (HGH), also known as somatropin, is a 191-amino acid single-chain polypeptide produced by the anterior pituitary gland. Recombinant human growth hormone (rhGH) is manufactured using recombinant DNA technology and is bioidentical to endogenous GH. It is FDA-approved for multiple growth and metabolic conditions and is one of the most extensively studied hormones in medicine.
> HGH (somatropin) is a CONTROLLED SUBSTANCE. Distribution without a valid prescription is a FEDERAL FELONY under 21 USC § 333(e). Penalties include up to 5 years imprisonment for distribution and up to 10 years for distribution to minors. This is NOT a grey-area research chemical — it is explicitly regulated by the FDA and DEA.
Research Snapshot
What the evidence says
ApprovedHGH currently shows 812 registered trials from ClinicalTrials.gov, 946 PubMed trial publications (552 RCT-tagged), and 9,318 PubMed references matching the stored source query. Treat PubMed references as literature surface area, not a count of clinical trials.
Known vs uncertain
Known signals
- 812 registered trials are tracked from ClinicalTrials.gov intervention records.
- 946 PubMed clinical-trial publications are indexed.
- 552 PubMed randomized controlled trial publications are indexed.
- 9,318 PubMed references are tracked separately from trial counts and can include animal, in-vitro, review, mechanism, or clinical records.
Open questions
- Evidence strength may vary by indication, route, formulation, and population.
- Public anecdotes can highlight interest or concern but do not establish clinical efficacy.
- Regulatory status and compounding access can change independently from the research literature.
Mechanism of Action
GH binds to the growth hormone receptor (GHR), activating the JAK2-STAT5 signaling pathway.
Key Research Benefits
Body composition: Reduces body fat (especially visceral fat) and increases lean body mass. Rudman et al. (1990, NEJM) landmark study showed 14.4% fat mass decrease and 8.8% lean mass increase in elderly men over 6 months.
Bone density: GH replacement increases bone mineral density over long-term use (12-18+ months). Particularly beneficial in GH-deficient adults.
Tissue repair and recovery: Enhances collagen synthesis, tendon and ligament repair, wound healing. Used clinically in burn recovery.
Sleep quality: GH replacement improves deep sleep quality (slow-wave sleep), which in turn supports further endogenous GH release.
Skin and hair: Improved skin thickness, elasticity, and hydration through collagen production. Often cited as an anti-aging benefit.
Cardiovascular: GH replacement in GH-deficient adults improves lipid profiles and may reduce cardiovascular risk markers.
Clinical Evidence Summary
Research Pipeline
Preclinical
Animal
Phase I
Phase II
Phase III
Approved
812
Registered Trials
946
Trial Publications
552
RCT Publications
9,318
PubMed References
ClinicalTrials.govPubMed ESearchCurated alias queryChecked May 3, 2026
Registered trials are ClinicalTrials.gov intervention records. Trial publications are PubMed records tagged as clinical trials or randomized controlled trials. PubMed references are broader source-query matches and can include animal studies, in-vitro work, reviews, mechanism papers, and trial publications.
812
Registered trials
946
Trial publications
552
RCT publications
9,318
PubMed references
977
Reviews
49
Meta-analyses
Registered trials source
Jun 1, 2026
somatropin
Uses curated ClinicalTrials.gov intervention aliases to avoid misleading registry matches.
View sourcePublication counts source
May 3, 2026
Human Growth Hormone, Somatropin, rHGH
Uses hormone and drug-name aliases instead of relying only on the HGH acronym.
View source- Rudman et al. (1990) — Landmark NEJM study. 12 elderly men received GH for 6 months. 14.4% decrease in fat mass, 8.8% increase in lean mass, 1.6% increase in vertebral bone density. Catalyzed the anti-aging GH movement.
- Liu et al. (2007) — Systematic review of 31 RCTs (Ann Intern Med). GH in healthy elderly increased lean mass by ~2 kg and decreased fat mass by ~2 kg, but increased edema, arthralgia, carpal tunnel, and glucose impairment.
- FDA-approved indications include: adult GH deficiency, pediatric GH deficiency, Turner syndrome, Prader-Willi syndrome, chronic renal insufficiency, SGA (small for gestational age), idiopathic short stature, short bowel syndrome, and HIV-associated wasting.
- KIMS database — Largest long-term GH replacement safety registry with data on >20,000 adults. No increased cancer incidence observed with replacement-dose GH.
Key PubMed References
9,318 PubMed references · showing top 22 by relevance
View all on PubMedRecombinant human growth hormone and brain neoplasm association: a pharmacovigilance and Mendelian randomization analysis based on US FAERS, Japanese JADER, and Canadian CVARD.
Review
Huang L, Zhang M, Li F, et al. · Frontiers in pharmacology · 2025
PMID: 40799818[Safety considerations for the clinical application of recombinant human growth hormone].
Review
Pan H, DU HW · Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics · 2024
PMID: 38802902Spectroscopic analysis of recombinant human growth hormone in the presence of sucrose and trehalose.
In Vitro
Kamrani S, Yaghmaei P, Nikkhah M, et al. · Biotechnology and applied biochemistry · 2023
PMID: 36807340Growth patterns and outcomes of growth hormone therapy in patients with acrodysostosis.
Human Study
Ertl DA, Mantovani G, de Nanclares GP, et al. · Journal of endocrinological investigation · 2023
PMID: 36749450Efficacy and Safety of Weekly Somatrogon vs Daily Somatropin in Children With Growth Hormone Deficiency: A Phase 3 Study.
Human Study
Deal CL, Steelman J, Vlachopapadopoulou E, et al. · The Journal of clinical endocrinology and metabolism · 2022
PMID: 35405011Anecdotes & Sentiment
Public discussion, not clinical evidence
This section summarizes what people are talking about in public sources. It can be useful for spotting questions, hype cycles, and recurring concerns, but it is separate from the evidence sections above.
Side Effects & Safety
> GH side effects are dose-dependent.
> GH side effects are dose-dependent. Low-dose replacement (1-2 IU) carries significantly less risk than high-dose performance use (4-8+ IU).
Common: Water retention/edema, joint pain (arthralgia), carpal tunnel syndrome, numbness/tingling in extremities, headache, elevated fasting glucose
Serious: Insulin resistance/type 2 diabetes, acromegaly-like symptoms (jaw/hand growth at high chronic doses), increased cancer risk (IGF-1 promotes cell proliferation), intracranial hypertension
Bodybuilding-specific: 'GH gut' (visceral organ growth at sustained high doses), gynecomastia when combined with androgens, hypothyroidism (GH increases T4→T3 conversion)
Contraindications: Active malignancy, diabetic retinopathy, acute critical illness, closed epiphyses in pediatric patients (for growth), Prader-Willi syndrome with severe respiratory impairment
Drug interactions: Glucocorticoids (antagonize GH), insulin (GH causes insulin resistance — may need dose adjustment), thyroid hormones, oral estrogen (reduces IGF-1 response)
Known Interactions
No curated interaction entry is live for HGH yet.
Until the interaction table is fully populated, use the interaction checker and related peptides below to explore adjacent compounds and likely research pairings.
Comparison Pages
Comparison pages
AllNo comparison page is linked yet.
Frequently Asked Questions
Research Disclaimer
This page is for research and educational purposes only. The information presented is based on published scientific literature and does not constitute medical advice, diagnosis, or treatment recommendations. Regulatory status can vary by compound, formulation, indication, and jurisdiction. Check official labeling, registry records, and qualified professional guidance before making any health-related decision. The studies referenced are linked to their original PubMed sources for verification.