What is GHRP-2?
GHRP-2 is a second-generation growth hormone-releasing peptide (GHRP). It is a hexapeptide (a chain of six amino acids) that has been extensively studied for its ability to correct growth hormone deficiencies and muscle wasting. Unlike GHRH analogues (like CJC-1295), which work through the GHRH receptor, GHRP-2 works through a completely different pathway: the **Growth Hormone Secretagogue Receptor (GHS-R)**.
In research settings, GHRP-2 is noted for its ability to produce a significant increase in GH levels with a relatively low potential for desensitization compared to first-generation peptides.
⚗️ Key Research Facts
- Molecular Formula: C45H55N9O6
- Pharmaceutical Name: Pralmorelin
- Primary Receptor: Ghrelin Receptor (GHS-R)
- Key Effect: Rapid pulsatile GH release
Mechanism: Ghrelin Receptor Agonism
GHRP-2 mimics the action of **Ghrelin**, the "hunger hormone." When it binds to GHS-R in the hypothalamus and pituitary, it signals the body to release growth hormone through two ways:
- Direct Stimulation: Telling the pituitary to release GH immediately.
- Somatostatin Inhibition: It suppresses somatostatin, the body's natural "brake" that prevents GH release. This results in a massive, clean pulse of growth hormone.
Pulsatile GH Release Patterns
Research indicates that GHRP-2 produces a "spike" in growth hormone that peaks within 15–30 minutes after administration. This spike then slowly returns to baseline over 2–3 hours. This **pulsatile** release is considered more physiological (natural) than the constant elevation provided by long-acting analogues or synthetic HGH.
Appetite & Metabolic Effects
Because it activates the ghrelin receptor, GHRP-2 research often observes a significant increase in **appetite** and caloric intake in subjects. This makes it a primary subject for researchers studying "cachexia" (muscle wasting) in cancer or HIV patients, where stimulating hunger is a critical therapeutic goal.
Orexigenic Effect
Significantly increases hunger signaling, supporting weight gain research in wasting models.
Deep Sleep Support
GH pulses are linked to improved Stage 3 (Deep) sleep quality in research subjects.
Research Protocols & Dosing
- Administration: Subcutaneous injection.
- Research Dose: 100 mcg to 300 mcg per administration.
- Frequency: Typically administered 2–3 times per day to maintain consistent GH pulses.
- Side Effects: Increased hunger, mild water retention, and slight increases in cortisol/prolactin at very high doses.
- Storage: Lyophilized powder in the freezer. Reconstituted solution in the refrigerator.
Frequently Asked Questions
Is it better than GHRP-6?
In research, GHRP-2 is considered "cleaner" and more potent than GHRP-6. It provides a larger GH spike and typically causes less intense hunger than GHRP-6, which is famous for causing extreme, immediate food cravings.
Does it help with injury repair?
By increasing growth hormone and downstream IGF-1, research indicates it can accelerate the repair of collagen and muscle tissue, though it is often used in combination with BPC-157 for these goals.
Where to buy GHRP-2 in Canada?
Nūmira Peptides offers high-purity GHRP-2 for scientific and laboratory research. Shop GHRP-2 →
