GHRP-2 Dosage Guide: Research Protocols, Timing & Reconstitution

Standard Dosage Range

Research dosing range: 100–300 mcg per dose

Educational reference only

These dosage ranges are derived from preclinical research and community protocols. No human clinical dose-ranging trials have established therapeutic doses for most research peptides. Always consult a qualified healthcare provider before starting any peptide protocol.

Dosage by Use Case

Growth Hormone Stimulation

100–300 mcg2–3× daily

Duration

1–3 months

Administer subcutaneously. Commonly stacked with GHRH analogs like CJC-1295 or Mod GRF 1-29 for synergistic effect. Multiple daily doses optimize GH pulsatility.

Anti-Aging / Wellness

100–200 mcg1–2× daily

Duration

1–3 months

Subcutaneous injection. Focus on evening/pre-sleep dose to enhance nocturnal GH release. Benefits may take several weeks to manifest.

Muscle Growth / Recovery

200–300 mcg2–3× daily

Duration

1–3 months

Administer pre- or post-workout for enhanced GH release. Combine with adequate protein intake and resistance training. Ensure sufficient rest and recovery.

Timing & Frequency

Injections are typically administered 30 minutes before meals or on an empty stomach for optimal absorption. Spacing doses 3–4 hours apart helps maximize pulsatile GH release. Evening doses can improve sleep quality.

Cycle Guidance

Cycles typically run for 1–3 months, followed by a break of equal length to prevent desensitization of the pituitary gland. Prolonged continuous use may diminish GH response. Monitor for potential side effects like elevated prolactin or cortisol.

Reconstitution Reference

Quick reference for reconstituting GHRP-2. For custom vial sizes and concentrations, use the Reconstitution Calculator.

Common Vial Size	Typically 5 mg per vial
BAC Water Volume	2.5 mL bacteriostatic water for 2 mg/mL concentration
Concentration & Draw	At 2 mg/mL: 100 mcg = 0.05 mL (5 units on a 100-unit insulin syringe)
Storage	Refrigerate at 2–8°C after reconstitution. Keep lyophilized powder at room temperature or refrigerated.
Stability	Reconstituted solution stable up to 30 days refrigerated. Lyophilized powder stable 12-24 months per manufacturer specifications.

Use the Reconstitution Calculator → for precise injection volumes based on your exact vial size, water volume, and desired dose.

Frequently Asked Questions

What is the best time to inject GHRP-2?

Administer GHRP-2 on an empty stomach, 30 minutes before meals or snacks, to maximize absorption and GH release. Pre-workout or pre-sleep injections can be strategically timed based on individual goals.

Can I stack GHRP-2 with other peptides?

GHRP-2 is frequently stacked with GHRH analogs like CJC-1295 or Mod GRF 1-29 for a synergistic effect, amplifying GH release more than either peptide alone. Consult with a healthcare professional before combining peptides.

What are the potential side effects of GHRP-2?

Common side effects include elevated cortisol and prolactin levels, water retention, increased appetite, and transient dizziness or lightheadedness after injection. Monitor for any adverse reactions and adjust dosage accordingly.

How long should I cycle GHRP-2?

Cycles typically run for 1–3 months, followed by a break of equal length to allow the pituitary gland to recover and prevent desensitization. Long-term continuous use may diminish GH response.

How should I store GHRP-2?

Keep lyophilized powder at room temperature or refrigerated. After reconstitution with bacteriostatic water, store the solution refrigerated at 2–8°C. Reconstituted solution is stable up to 30 days refrigerated.