RESEARCH CATEGORY
Anabolic Pathway Research Compounds.
FOR IN VITRO RESEARCH USE ONLY · NOT FOR HUMAN CONSUMPTION · NOT EVALUATED BY FDA
Lyophilized GHRH analogs and growth hormone secretagogues referenced in literature on anabolic signaling pathways in cellular research models.
Understanding the GH axis.
The GH axis is the research shorthand for the growth-hormone signaling system, the cellular pathway that published literature has studied most heavily in the context of pulsatile growth-hormone secretion and downstream IGF-1. Two receptors anchor it: the pituitary GHRH receptor, where growth-hormone-releasing hormone analogs act, and the ghrelin receptor (GHS-R), where ghrelin mimetics act. Research peptides in this category are classified by which of these receptors they engage, from single-receptor GHRH analogs and ghrelin mimetics through to combined blends that pair both.
That receptor target is the single most useful way to read a GH-axis compound. A GHRH analog acts on the GHRH receptor, a ghrelin mimetic acts on the GHS-R, and a combined blend acts on both at once. The compounds most referenced in current research literature map cleanly onto that ladder, which is why researchers comparing them tend to start with the receptor pathway rather than the molecule name.
Compounds studied across the GH axis
| Compound class | Receptor target | Studied for |
|---|---|---|
| GHRH analogs (Sermorelin, Tesamorelin, CJC-1295) | GHRH receptor | Pituitary GHRH-receptor signaling |
| Ghrelin mimetics / GHRPs (Ipamorelin, GHRP-2, GHRP-6, Hexarelin) | Ghrelin receptor (GHS-R) | Selective ghrelin-receptor signaling |
| Tesamorelin (GHRH analog) | GHRH receptor | Pituitary GHRH-receptor signaling for pulsatile GH |
Receptor targets reflect how each compound class is characterized in published research literature. Listed for in vitro research context only.
Tesamorelin, the GHRH analog
Tesamorelin sits at the GHRH-analog end of the ladder. It is referenced in literature as a stabilized analog of growth-hormone-releasing hormone that acts on the pituitary GHRH receptor, the configuration researchers study for pulsatile growth-hormone signaling and downstream IGF-1. NLL supplies it as a lyophilized research compound at 99.6 percent average HPLC purity, third-party US lab tested, with a certificate of analysis tied to the lot number on every vial.
GH-axis research, common questions
What is the GH axis, or anabolic pathway, in peptide research?
The GH axis is the research shorthand for the growth-hormone signaling system, studied in literature for pulsatile GH secretion and downstream IGF-1. Two receptors anchor it: the pituitary GHRH receptor, where GHRH analogs act, and the ghrelin receptor (GHS-R), where ghrelin mimetics act. Research compounds are characterized by which receptors they bind, from single-receptor analogs and mimetics to combined blends.
What is the difference between a GHRH analog and a ghrelin mimetic (GHRP)?
A GHRH analog, such as sermorelin, tesamorelin, or CJC-1295, is referenced for acting on the pituitary GHRH receptor. A ghrelin mimetic or GHRP, such as ipamorelin, GHRP-2, GHRP-6, or hexarelin, is studied as a selective ghrelin-receptor agonist on the GHS-R. The distinction researchers draw is which receptor each compound engages. Combined blends pair both so the two pathways are studied together.
Are these GH research peptides third-party tested?
Yes. Every GH-axis compound is independently HPLC tested by Finnrick before it ships, at 99 percent or higher average purity. The lot number on each vial maps to that batch's own COA. If an independent test does not match the published COA for that lot, NLL refunds the order in full and you keep the vial.
Are these compounds for human use?
No. Every compound here is intended for in vitro laboratory and research use only. It is not for human consumption, is not a drug or supplement, and these statements have not been evaluated by the FDA. The products are not intended to diagnose, treat, cure, or prevent any condition.
Where can I buy GH or anabolic research peptides in the US?
Next Level Labs ships across the continental United States. Most orders ship within 1 to 2 business days via UPS 2nd Day Air in discreet, unbranded packaging, flat 10 dollar shipping and free over 200 dollars. Payment is by card, Apple Pay, Google Pay, Venmo Business, Zelle, or bank transfer, and every order is backed by a COA-match guarantee.
GROWTH FACTOR RESEARCH
IGF1-LR3
Long-arginine IGF-1 analog with reduced binding-protein affinity, used in cell signaling work.
COA on request
$89.99/vial
For in vitro research use only. Not for human consumption. Not evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent any condition. US shipping only.