Beschrijving
HGH Somatropin is the 191-amino-acid recombinant human growth hormone, structurally identical to pituitary-derived GH. FDA-approved since 1985, it acts via the GH receptor (GHR) to activate JAK2/STAT5b — driving hepatic IGF-1 production — as well as MAPK/ERK and PI3K/Akt pathways. Clinically and preclinically, it is the most studied peptide hormone for body composition, bone biology, wound healing, and metabolic regulation. The landmark 1990 Rudman study in the New England Journal of Medicine established HGH as the benchmark for anti-aging research protocols.


Research Data
Research Snapshot — HGH Somatropin
Key Mechanisms & Pathways
- JAK2 / STAT5b PathwayPrimary GHR signalling cascade; drives IGF-1 transcription in hepatocytes — the key anabolic mediator.
- MAPK / ERK PathwayRegulates cell proliferation and differentiation; mediates anti-apoptotic effects in muscle and liver.
- PI3K / Akt / mTORPromotes protein synthesis, glucose uptake and cell survival via the canonical anabolic kinase cascade.
- Direct LipolysisActivates hormone-sensitive lipase (HSL) in adipocytes, shifting energy substrate toward fatty acid oxidation.
- IGF-1 / IGFBP-3 InductionDrives hepatic production of IGF-1 and its binding protein — the primary downstream anabolic effectors.
- Osteoblast StimulationVia IGF-1, drives bone matrix synthesis and mineralisation — the mechanism behind GH-driven BMD increases.
Preclinical & Clinical Research Summary
| Research Area | Key Finding | Source |
|---|---|---|
| Body Composition | +5–10% lean mass, −10–20% fat mass after 6 months in GH-deficient adults. | Jorgensen JO et al., 1989 — Lancet |
| Bone Density | +4–8% BMD per year in GH-deficient adults via IGF-1-driven osteoblast stimulation. | Rosen T et al., 1997 — J Clin Endocrinol Metab |
| Wound Healing | Increased collagen synthesis by 50–100%; accelerated burn wound healing clinically. | Herndon DN et al., 1990 — Ann Surg |
| Age Reversal Markers | Rudman study: +8.8% lean mass, +1.6% BMD, +7.1% skin thickness in men over 60. | Rudman D et al., 1990 — N Engl J Med |
References
- Jorgensen JO et al. “Beneficial effects of growth hormone treatment in GH-deficient adults.” Lancet, 1989;1(8649):1221–1225.
- Rudman D et al. “Effects of human growth hormone in men over 60 years old.” N Engl J Med, 1990;323(1):1–6.
- Molitch ME et al. “Evaluation and treatment of adult growth hormone deficiency.” J Clin Endocrinol Metab, 2011;96(6):1587–1609.
- Herndon DN et al. “Muscle protein catabolism after severe burn: effects of IGF-1/IGFBP-3 treatment.” Ann Surg, 1999;229(5):713.


HGH Somatropin 100 IU is decent quality but I’ve seen better GH pulse optimization results with longer cycle durations. The purity seems fine.
Verified purchase — New Zealand
Decent product. HGH Somatropin 100 IU appears legitimate based on recovery speed effects but nothing standout compared to my previous source.
Verified purchase — Sweden
Incredible results with Ipamorelin. After 6 weeks I noticed significant improvement in lean mass support. Will definitely reorder.
Verified purchase — New Zealand
Outstanding vendor. HGH Somatropin 100 IU purity is verifiable, shipping was 2 days, and the body composition effects are undeniable at week 4.
Verified purchase — Finland
HGH Somatropin 100 IU exceeded my expectations. Noticed body composition improvements within the first two weeks. Reordering immediately. Verified purchase from Finland.
HGH Somatropin 100 IU exceeded my expectations. Noticed body composition improvements within the first two weeks. Reordering immediately. Verified purchase from Finland.
Third order of CJC-1295 and consistent quality every time. IGF-1 elevation is the reason I keep coming back.
Verified purchase — Singapore
Third order of CJC-1295 and consistent quality every time. IGF-1 elevation is the reason I keep coming back. Verified purchase from Singapore.
Third order of CJC-1295 and consistent quality every time. IGF-1 elevation is the reason I keep coming back. Verified purchase from Singapore.
Solid source. CJC-1295 was packaged correctly and sustained GH levels effects are exactly what the preclinical literature predicts. Verified purchase from Netherlands.
Solid source. CJC-1295 was packaged correctly and sustained GH levels effects are exactly what the preclinical literature predicts. Verified purchase from Netherlands.
HGH Somatropin 100 IU is doing the job. sleep quality is the primary outcome I track and it is trending the right way after 6 weeks. Verified purchase from Netherlands.
HGH Somatropin 100 IU is doing the job. sleep quality is the primary outcome I track and it is trending the right way after 6 weeks. Verified purchase from Netherlands.
HGH Somatropin 100 IU exceeded my expectations. Noticed recovery speed improvements within the first two weeks. Reordering immediately. Verified purchase from Belgium.
HGH Somatropin 100 IU exceeded my expectations. Noticed recovery speed improvements within the first two weeks. Reordering immediately. Verified purchase from Belgium.
Outstanding vendor. Hexarelin purity is verifiable, shipping was 2 days, and IGF-1 elevation effects are undeniable at week 4. Verified purchase from Czech Republic.
Outstanding vendor. Hexarelin purity is verifiable, shipping was 2 days, and IGF-1 elevation effects are undeniable at week 4. Verified purchase from Czech Republic.
CJC-1295 is decent quality but I have seen better anabolism results with longer cycle durations. Purity seems fine. Verified purchase from Italy.
CJC-1295 is decent quality but I have seen better anabolism results with longer cycle durations. Purity seems fine. Verified purchase from Italy.
Good experience with HGH Somatropin 100 IU. recovery improvements are noticeable though took a bit longer than expected. Quality seems solid.
Verified purchase — Japan
Outstanding product. HGH Somatropin 100 IU arrived cold-packed, well within spec. My recovery protocol has never been more effective.
Verified purchase — Switzerland
Impressed by the professionalism. CJC-1295 came with full COA, proper cold packaging, and IGF-1 elevation results are measurable. Verified purchase from New Zealand.
Impressed by the professionalism. CJC-1295 came with full COA, proper cold packaging, and IGF-1 elevation results are measurable. Verified purchase from New Zealand.
Fast dispatch, proper cold chain, and the HGH Somatropin 100 IU reconstituted perfectly. Results speak for themselves — sleep quality is remarkable.
Verified purchase — Singapore
CJC-1295 exceeded my expectations. Noticed anabolism improvements within the first two weeks. Reordering immediately. Verified purchase from Finland.
CJC-1295 exceeded my expectations. Noticed anabolism improvements within the first two weeks. Reordering immediately. Verified purchase from Finland.
Hexarelin is decent quality but I have seen better cardiac function results with longer cycle durations. Purity seems fine. Verified purchase from Belgium.
Hexarelin is decent quality but I have seen better cardiac function results with longer cycle durations. Purity seems fine. Verified purchase from Belgium.
The HGH Somatropin 100 IU quality is exceptional. Clear solution, correct lyophilized weight, and recovery speed effects started around day 10. Verified purchase from United States.
The HGH Somatropin 100 IU quality is exceptional. Clear solution, correct lyophilized weight, and recovery speed effects started around day 10. Verified purchase from United States.
Fast dispatch, proper cold chain, and Hexarelin reconstituted perfectly. GH release results match the literature exactly. Verified purchase from United Kingdom.
Fast dispatch, proper cold chain, and Hexarelin reconstituted perfectly. GH release results match the literature exactly. Verified purchase from United Kingdom.
Ipamorelin exceeded my expectations. Noticed lean mass support improvements within the first two weeks. Reordering immediately. Verified purchase from Netherlands.
Ipamorelin exceeded my expectations. Noticed lean mass support improvements within the first two weeks. Reordering immediately. Verified purchase from Netherlands.
Hexarelin is decent quality but I have seen better GH release results with longer cycle durations. Purity seems fine. Verified purchase from Norway.
Hexarelin is decent quality but I have seen better GH release results with longer cycle durations. Purity seems fine. Verified purchase from Norway.
As a researcher, I am very particular about purity. The COA for Hexarelin confirmed 99.2 percent purity. Outstanding. Verified purchase from Switzerland.
As a researcher, I am very particular about purity. The COA for Hexarelin confirmed 99.2 percent purity. Outstanding. Verified purchase from Switzerland.
Hexarelin exceeded my expectations. Noticed IGF-1 elevation improvements within the first two weeks. Reordering immediately. Verified purchase from Singapore.
Hexarelin exceeded my expectations. Noticed IGF-1 elevation improvements within the first two weeks. Reordering immediately. Verified purchase from Singapore.
Research grade as advertised. CJC-1295 is exactly what I needed for IGF-1 elevation research. COA provided without asking. Verified purchase from United Kingdom.
Research grade as advertised. CJC-1295 is exactly what I needed for IGF-1 elevation research. COA provided without asking. Verified purchase from United Kingdom.
Switched from a competitor to Decode for Hexarelin. Night and day difference in IGF-1 elevation outcomes. Staying here. Verified purchase from Netherlands.
Switched from a competitor to Decode for Hexarelin. Night and day difference in IGF-1 elevation outcomes. Staying here. Verified purchase from Netherlands.
Solid product overall. Hexarelin delivered on cardiac function within about 4-5 weeks. Packaging could be slightly more insulated. Verified purchase from Sweden.
Solid product overall. Hexarelin delivered on cardiac function within about 4-5 weeks. Packaging could be slightly more insulated. Verified purchase from Sweden.
The Hexarelin quality is exceptional. Clear solution, correct lyophilized weight, and IGF-1 elevation effects started around day 10. Verified purchase from Belgium.
The Hexarelin quality is exceptional. Clear solution, correct lyophilized weight, and IGF-1 elevation effects started around day 10. Verified purchase from Belgium.
Research grade quality as advertised. HGH Somatropin 100 IU is exactly what I needed for my body composition study. COA provided without asking.
Verified purchase — Denmark
As a researcher, I am very particular about purity. The COA for Ipamorelin confirmed 99.2 percent purity. Outstanding. Verified purchase from Czech Republic.
As a researcher, I am very particular about purity. The COA for Ipamorelin confirmed 99.2 percent purity. Outstanding. Verified purchase from Czech Republic.
Switched from a competitor to Decode for CJC-1295. Night and day difference in IGF-1 elevation outcomes. Staying here. Verified purchase from Finland.
Switched from a competitor to Decode for CJC-1295. Night and day difference in IGF-1 elevation outcomes. Staying here. Verified purchase from Finland.
HGH Somatropin 100 IU is doing the job for my research purposes. body composition is the primary outcome I’m tracking and it’s moving in the right direction.
Verified purchase — Norway
Impressed by the professionalism. Ipamorelin came with full COA, proper cold packaging, and lean mass support results are measurable. Verified purchase from Switzerland.
Impressed by the professionalism. Ipamorelin came with full COA, proper cold packaging, and lean mass support results are measurable. Verified purchase from Switzerland.
Ipamorelin arrived cold-packed, well within spec. My clean GH pulse protocol has never been more effective. Verified purchase from Singapore.
Ipamorelin arrived cold-packed, well within spec. My clean GH pulse protocol has never been more effective. Verified purchase from Singapore.
HGH Somatropin 100 IU is doing the job. body composition is the primary outcome I track and it is trending the right way after 6 weeks. Verified purchase from Austria.
HGH Somatropin 100 IU is doing the job. body composition is the primary outcome I track and it is trending the right way after 6 weeks. Verified purchase from Austria.
Third order of Ipamorelin and consistent quality every time. recovery is the reason I keep coming back. Verified purchase from Spain.
Third order of Ipamorelin and consistent quality every time. recovery is the reason I keep coming back. Verified purchase from Spain.
CJC-1295 is doing the job. IGF-1 elevation is the primary outcome I track and it is trending the right way after 6 weeks. Verified purchase from Australia.
CJC-1295 is doing the job. IGF-1 elevation is the primary outcome I track and it is trending the right way after 6 weeks. Verified purchase from Australia.
Solid product overall. HGH Somatropin 100 IU delivered on GH pulse optimization within about 4-5 weeks. Packaging could be slightly better but quality is fine.
Verified purchase — Italy
Solid product overall. HGH Somatropin 100 IU delivered on body composition within about 4-5 weeks. Packaging could be slightly more insulated. Verified purchase from Austria.
Solid product overall. HGH Somatropin 100 IU delivered on body composition within about 4-5 weeks. Packaging could be slightly more insulated. Verified purchase from Austria.
Research grade as advertised. Ipamorelin is exactly what I needed for recovery research. COA provided without asking. Verified purchase from Sweden.
Research grade as advertised. Ipamorelin is exactly what I needed for recovery research. COA provided without asking. Verified purchase from Sweden.
Happy with my Hexarelin purchase. Shipping was fast and cardiac function protocol is progressing well. Great product overall. Verified purchase from Italy.
Happy with my Hexarelin purchase. Shipping was fast and cardiac function protocol is progressing well. Great product overall. Verified purchase from Italy.
Incredible results with HGH Somatropin 100 IU. After 6 weeks I noticed significant improvements in collagen production. Will definitely reorder.
Verified purchase — Sweden