Gonadorelin vs Leuprolide
Both peptides act on the GnRH receptor. Gonadorelin is the synthetic copy of the native decapeptide and is cleared within minutes. Leuprolide is a modified nonapeptide built to resist breakdown, so it persists far longer.
Synthetic gonadotropin-releasing hormone
Choose Gonadorelin if
- ✓ You need a reference for the native GnRH sequence
- ✓ You are modelling pulsatile receptor exposure
Synthetic GnRH receptor agonist
Choose Leuprolide if
- ✓ Your question is about stable GnRH analogues
- ✓ You are studying receptor desensitisation under sustained exposure
Side-by-side specification
| Compare | Gonadorelin Synthetic gonadotropin-releasing hormone | Leuprolide Synthetic GnRH receptor agonist |
|---|---|---|
| Class | GnRH receptor agonist (native sequence) | GnRH receptor agonist |
| Research area | Neuroendocrine | Neuroendocrine |
| Receptor targets | GnRH receptor | GnRHR |
| Length | 10 amino acids (pyroglutamyl N-terminus, amidated C-terminus) | 9 amino acids |
| Molecular mass | ≈ 1.18 kDa | ≈ 1.21 kDa |
| Origin | Synthetic copy of the human hormone | Synthetic GnRH analogue |
| Evidence level | 3/5 Early human trials | 5/5 Approved drug, phase 3 trials |
| Regulatory status | Diagnostic use in some regions | Approved prescription medicine |
| Nordapep from | Not listed | Not listed |
| Best price per mg | Not listed | Not listed |
| View Gonadorelin at Nordapep → | View Leuprolide at Nordapep → |
What separates them
For research, gonadorelin is the natural-signal reference. Leuprolide is the stable analogue to reach for when the question is how a long-lasting receptor signal differs from a brief one.
Read the full guides for Gonadorelin and Leuprolide, or add a third compound in the comparison tool.
FAQ
Which has the longer half-life?
Leuprolide, by a wide margin, because of its D-amino acid substitution and modified C-terminus.
Are they interchangeable in experiments?
No. Their different stability means they produce different exposure patterns, which is the whole point of comparing them.
Are Gonadorelin and Leuprolide approved medicines?
Gonadorelin: Diagnostic use in some regions. Leuprolide: Approved prescription medicine. Research-grade material of either is not a medicine and is supplied for in vitro research only.
Where can I buy Gonadorelin and Leuprolide?
Nordapep lists compounds with a Certificate of Analysis matched to the batch reference. Check each compound page for current availability.
More comparisons
Where to buy
Why we send researchers to Nordapep
Comparing compounds is only half the job. The other half is knowing the vial contains what the label says. Nordapep publishes batch documentation for every compound it sells.
Browse the Nordapep catalogue →Each batch reference on the label matches its CoA, so you can check what is in the vial.
Enter the batch reference from your vial into Nordapep's batch-verification tool.
Purity is reported by RP-HPLC, the standard method for peptides of this size.
Bundled stacks for common comparisons, plus tiered pricing for volume orders.