IGF-1 LR3 vs Hexarelin at a glance
| IGF-1 LR3 | Hexarelin | |
|---|---|---|
| Also known as | Long R3 Insulin-like Growth Factor 1 | potent GHRP |
| Category | Growth Hormone & Muscle | Growth Hormone & Muscle |
| Format | SubQ / IM | SubQ |
| Research level | Advanced | Advanced |
| Research sizes | 1 mg vial | 2 mg vial, 5 mg vial |
| In one line | A long-acting IGF-1 analog studied as one of the most anabolic research peptides. | The most potent GHRP in the catalog, studied for strong growth-hormone release. |
What is IGF-1 LR3?
IGF-1 LR3 is a modified, long-acting analog of insulin-like growth factor 1, with an 83-amino-acid structure and a reduced affinity for binding proteins that gives it an extended active half-life in research models.
IGF-1 LR3 research focuses on IGF-1-receptor activation driving cell proliferation, nutrient partitioning, and anabolic signaling. Its extended half-life is the defining research feature versus native IGF-1.
What is Hexarelin?
Hexarelin is a synthetic hexapeptide and one of the most potent growth-hormone-releasing peptides studied in research, with reported activity beyond GH release including cardiovascular-tissue signaling.
Hexarelin strongly activates the GH-secretagogue receptor. Research notes desensitization with continuous exposure and increases in prolactin and cortisol, so cycled study designs are common.
Key research differences
The two are best understood by what each is studied for. IGF-1 LR3: Where GHRPs and GHRH analogs stimulate endogenous GH, IGF-1 LR3 supplies a downstream IGF signal directly, making it a distinct and more advanced research tool. Hexarelin: Hexarelin is the most potent GHRP studied here but with the most off-target signaling and desensitization, contrasting with the gentler Ipamorelin.
How researchers choose between them
Because IGF-1 LR3 and Hexarelin both sit in the growth hormone & muscle category, the choice is a research-design question: match the compound to the exact signal or endpoint your model targets, and in many protocols the two are studied in parallel or in sequence rather than as either/or. Whichever you select, compare on verified quality: both are third-party tested to a 99%+ purity target with a COA on request.
Frequently asked questions
What is the difference between IGF-1 LR3 and Hexarelin?
IGF-1 LR3 is a long-acting IGF-1 analog studied as one of the most anabolic research peptides, while Hexarelin is the most potent GHRP in the catalog, studied for strong growth-hormone release. Both sit in the growth hormone & muscle research category. Both are research-use-only.
Can IGF-1 LR3 and Hexarelin be studied together?
Yes - within the same category they are often studied in parallel or sequence to compare or combine effects. Any combination work is laboratory research only. IGF-1 LR3: Where GHRPs and GHRH analogs stimulate endogenous GH, IGF-1 LR3 supplies a downstream IGF signal directly, making it a distinct and more advanced research tool.
Which is better, IGF-1 LR3 or Hexarelin?
Neither is universally "better" - the right choice depends on the research question. Match the compound to your model's target signal, and compare suppliers on verifiable third-party purity, not sticker price. Hexarelin: Hexarelin is the most potent GHRP studied here but with the most off-target signaling and desensitization, contrasting with the gentler Ipamorelin.
What sizes are IGF-1 LR3 and Hexarelin supplied in?
IGF-1 LR3 is supplied in 1 mg research sizes and Hexarelin in 2 mg and 5 mg, both as lyophilized (freeze-dried) powder in sealed vials that are reconstituted in the lab before use in a liquid research model. A Certificate of Analysis tied to the tracked lot is available on request for either compound.
Are IGF-1 LR3 and Hexarelin FDA approved?
No. The research-grade IGF-1 LR3 and Hexarelin supplied here are not FDA-approved drug products; they are sold strictly for laboratory and in-vitro research. Where an approved pharmaceutical form of either compound exists, it is a separate prescription product made to clinical standards. Research material is not for human or animal consumption.
All comparisons · IGF-1 LR3 · Hexarelin · IGF-1 LR3 cost
External references: Peptide (Wikipedia) · U.S. Food and Drug Administration