What is GHRP-6?
GHRP-6 (Growth Hormone Releasing Peptide-6) is a synthetic hexapeptide that was among the first compounds discovered to stimulate the pituitary gland to release endogenous growth hormone. It is not a hormone itself, but a "secretagogue"—an agent that signals the body's glands to work more actively.
In scientific research, GHRP-2 is often cited for its potency, but GHRP-6 remains the gold standard for studying the link between growth hormone release and hunger signaling.
⚗️ Key Research Facts
- Molecular Class: Hexapeptide
- Generation: First-generation GHS
- Primary Receptor: GHS-R1a (Ghrelin Receptor)
- Notable Side Effect: Intense Hunger (Acute)
Mechanism: The Ghrelin Receptor
GHRP-6 works by binding to the **Growth Hormone Secretagogue Receptor (GHS-R1a)**. This receptor is primarily found in two areas:
- Pituitary Gland: Directly triggers the exocytosis (release) of stored growth hormone into the blood.
- Hypothalamus: Activates the "feeding center" of the brain, mimicking the natural signals of the hormone ghrelin.
Appetite & Gastric Motility
The defining characteristic of GHRP-6 in research is its "orexigenic" effect. Within 20 minutes of administration, subjects typically experience intense hunger. This makes it an invaluable tool for researching **Cachexia** (muscle wasting) and conditions where caloric intake must be dramatically increased.
Gastric Emptying
Research shows GHRP-6 can accelerate the rate at which the stomach clears food, potentially aiding in studies of gastroparesis.
Anti-Inflammatory
Some studies suggest GHRP-6 may have protective effects on the liver and heart through non-GH mediated pathways.
GHRP-6 vs. GHRP-2
While similar, researchers choose between them based on specific goals:
| Feature | GHRP-6 | GHRP-2 |
|---|---|---|
| GH Potency | Strong | Stronger |
| Appetite Stim | Extreme | Moderate |
| Cortisol/Prolactin | Moderate Rise | Mild Rise |
| Best For | Wasting/Metabolism | GH/IGF-1 Output |
Research Protocols & Dosing
- Administration: Subcutaneous injection.
- Research Dose: 100 mcg to 300 mcg per administration.
- Frequency: 2–3 times daily.
- Side Effects: Intense hunger, water retention, and tingling in the extremities.
- Storage: Lyophilized powder in the freezer. Reconstituted solution in the refrigerator.
Frequently Asked Questions
Does it cause "GH Bleed"?
No. GHRP-6 causes a rapid pulse of growth hormone that returns to baseline within 2–3 hours. It does not cause a constant, non-pulsatile leak of hormone, which is why it's considered more physiological than synthetic HGH.
Can I eat immediately after?
In research, it is recommended to wait 30–60 minutes after injection before eating to ensure the GH pulse reaches its peak without being interrupted by the insulin response to food.
Where to buy GHRP-6 in Canada?
Nūmira Peptides offers high-purity GHRP-6 for scientific and laboratory research. Shop GHRP-6 →
