Not medical advice. Talk to your provider before using any peptide.
Full disclaimerPeptide Schedule Research TeamReviewed Apr 20267 Citations
Cyclic glycine-proline (cGP) is your body's built-in IGF-1 regulator. At just 154 Da, this oral cyclic dipeptide crosses the blood-brain barrier and may support neuroprotection, memory, and blood pressure. Research is preclinical; no placebo-controlled human RCTs exist for this compound yet.
0.04mcg · Daily
Summary: Add 0mL BAC water to your 5mg vial. Draw to < 0.1 units on a U-100 syringe for a 0.04mcg dose. This vial will last 0 doses.
View side effects and safety warnings →
| Level | Dose / Injection | Frequency |
|---|---|---|
| Beginner | 0.04mg | Daily |
| Moderate | 0.04mg | 2x Daily |
| Aggressive | 0.08mg | Daily |
You don't inject cGP. One capsule a day, that's it. The commercial product (cGPMAX) delivers 40 mcg per capsule. Some people take two capsules (80 mcg total) for more pronounced cognitive decline or post-concussion recovery. No reconstitution math applies here since cGP is an oral capsule product. If you're sourcing raw cGP powder instead, you'll need an analytical balance with 0.001 mg resolution. Standard milligram-calibrated scales can't measure 40 mcg accurately. Honestly, raw powder dosing at this scale is impractical for most people. The biggest thing beginners miss: cGP works on an accumulation model. You won't feel anything for weeks. The manufacturer says 90 days minimum before you can reasonably assess whether it's working. Most people who quit early leave before the compound had any chance of reaching effective tissue concentrations. Consistency matters more than timing; take it morning, evening, with food, without food, just don't skip days. Store capsules at room temperature away from light and moisture. No refrigeration needed.
Dosing based on Preclinical data only: no human dosing established — 12 published references.View all sources →
Cross-check your Cyclic Glycine-Proline (cGP) reconstitution math with AI
Pricing updated 2026-04-09
Prices are estimates and vary by source, location, and prescription status.Full pricing breakdown →
Disclaimer: This curve is a simplified first-order exponential decay model. Actual pharmacokinetics vary based on injection site, individual metabolism, body composition, and other factors. Half-life values are approximate and based on available preclinical and clinical literature. Many research peptides lack formal human pharmacokinetic studies. This is for educational purposes only — not medical advice.
Cyclic glycine-proline (cGP) is your body's built-in IGF-1 regulator. At just 154 Da, this oral cyclic dipeptide crosses the blood-brain barrier and may support neuroprotection, memory, and blood pressure. Research is preclinical; no placebo-controlled human RCTs exist for this compound yet.