Cognitive
Cyclic Glycine-Proline
Longevity
0
Amino acids
Molecular weight
Peptide
Type
Endogenous cyclic dipeptide found in plasma, breast milk, and cerebrospinal fluid. Functions as metabolite of IGF-1, regulating its bioavailability through competitive binding to IGFBP-3. Demonstrates neuroprotective, cognitive-enhancing, and cardioprotective properties supported by clinical trials.
Top researched benefits
Overview of Cyclic Glycine-Proline
Competes with IGF-1 for IGFBP-3 binding, normalizing bioavailable IGF-1 levels. Acts as positive allosteric modulator of AMPA and GABA-A receptors. Increases BDNF levels via Akt/MDM2-p53 pathway activation.
Neurological
- Higher cGP levels correlate with improved memory retention in elderly populations
- Protects neural stem cells from oxidative stress; efficacy demonstrated in stroke models
- Mouse studies show reduced amyloid plaque load and improved spatial memory
- Clinical study showed increased CSF cGP and reduced anxiety/depression scores
Metabolic
- Clinical trial improved vascular complications and normalized HbA1c%
- Demonstrated systolic blood pressure reduction in clinical observations
Recovery
- Higher cGP/IGF-1 ratios associated with favorable clinical outcomes
- Maintained ratios correlate with preserved cognitive function with age
Storage
Room temperature in sealed container, protected from moisture and light
Frequency
Once daily, preferably in the morning
Typical Dose
20-100 μg daily (or 300mg blackcurrant extract 2x daily)
Cycle Duration
4-12 weeks
No visual available
Due to this peptide having no amino acids, there is no molecular chain to display.
Chemical Makeup
Key benefits
Neuroprotection and cognitive enhancement
IGF-1 optimization
Cardiovascular support
Metabolic health improvement
Blood-brain barrier penetration
Convenient oral administration
Community interest
This peptide is still gaining traction in the community.
IGF-1 Bioavailability Regulator & Neuroprotective Peptide
This overview is informational and based on aggregated descriptions from studies and user reports.
Was it helpful?YesCyclic Glycine-Proline Molecular Information
View the scientifc details of Cyclic Glycine-Proline.
Molecular Weight
154.17DaChain Length
0Amino AcidsType
PeptideCyclic Glycine-Proline Protocols
Preferred route with excellent bioavailability and blood-brain barrier crossing.
| Goal | Dosage | Frequency | Route |
|---|---|---|---|
| General cognitive support | 20 | 1 week range | Oral capsule |
| Neuroprotection/anti-aging | 40 | 1 week range | Oral capsule |
| Metabolic/cardiovascular support | 40 | 1 week range | Oral capsule |
| Via blackcurrant extract | 300 | 2 week range | Oral capsule |
Cyclic Glycine-Proline Cycle
The Cyclic Glycine-Proline Cycle section explains how long a typical cycle lasts and what to expect during each phase. Over time, your body can become less responsive with continuous use.
Taking breaks between cycles may help maintain effectiveness and support better overall results.
- Week 1-2
- Possible subtle improvements in mental clarity
- Week 2-4
- Enhanced cognitive function and focus may become noticeable
- Week 4-8
- Neuroprotective and metabolic benefits accumulating
- Week 8-12
- Optimal IGF-1 regulation and sustained cognitive support
Dosing tools
Cyclic Glycine-Proline Peptide Dosage Calculator
Calculate peptide doses with our visual syringe guide.
0.3mL / 30 units
5 units
0.050 mL
1 mL
2 mL
3 mL
5 mL
Custom
Conversion: 1,000 mcg = 1 mg
Injection Results
Based on your vial and dilution inputs.
Safe concentration range
Cyclic Glycine-Proline
SINGLE COMPOUNDVolume per injection
0.05
mL
Concentration
10.00
mg/mL
Doses per vial
20
doses
Total injections per vial
20 injections
How it works
Based on a 10 mg Cyclic Glycine-Proline vial diluted with 1 mL of bacteriostatic water, each 500 mcg injection equals 0.05 mL.
Research Purposes Only
These calculators are provided for educational and research purposes only. Always verify calculations and consult with qualified professionals. The information provided is not medical advice. Peptides should only be used in accordance with applicable laws and regulations.
Reference Guide
Dosing Cycle
- Peptide
- Cyclic Glycine-Proline
- Dosing
- 20-100 μg daily (or 300mg blackcurrant extract 2x daily)
- Dosing Frequency
- Once daily, preferably in the morning
- Cycle Duration
- 4-12 weeks
- Storage
- Room temperature in sealed container, protected from moisture and light
Note: Triple agonist; microdose for fewer side effects
Reconstitution Tips
- Use bacteriostatic water (BAC) — contains 0.9% benzyl alcohol for preservation
- Inject water slowly — aim down the vial wall, not directly onto powder
- Never shake — gently swirl or roll the vial until dissolved
- Store properly — refrigerate at 2-8°C after reconstitution
- Use within 28 days — most reconstituted peptides remain stable for about 4 weeks
- Keep sterile — always clean vial tops with alcohol before drawing
Peptide Interactions
Research suggestions of Cyclic Glycine-Proline interactions with other common peptides and substances.
Healing
bpc
Longevity
BPC-157
COMPATIBLE
Different pathways; BPC-157 promotes tissue repair, cGP modulates IGF-1
Cognitive
sel
Longevity
Selank
COMPATIBLE
Complementary cognitive effects; Selank addresses anxiety, cGP optimizes IGF-1
Cognitive
sema
Longevity
Semax
COMPATIBLE
Both offer neuroprotection and nootropic effects through distinct pathways
Side effects
Contraindications
Consult healthcare provider if taking IGF-1 or growth hormone medications
Limited long-term human data available
Not studied in pregnancy
Stop signs
Allergic reactions (rash, difficulty breathing, swelling)
Unexpected blood glucose changes
Unusual fatigue or weakness
Bad signs
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Frequently asked questions
What benefits can peptides offer in research?
Peptides can support cellular repair, immune function, metabolic health, and tissue regeneration. Research suggests they may help with recovery, sleep quality, skin health, and cognitive function, depending on the specific peptide and its mechanism of action.
What are some exciting applications of peptides in modern science?
Current research explores peptides for longevity, muscle recovery, wound healing, metabolic disorders, and neuroprotection. Scientists are also investigating peptide-based drug delivery and targeted therapies that could offer more precise treatment options.
How do peptides influence health and wellness?
Peptides work by binding to receptors on cells and triggering specific biological responses. Depending on the peptide, they may promote growth hormone release, support collagen production, modulate inflammation, or influence neurotransmitter activity—each with different implications for health and wellness.
Where can I find the latest studies on peptide applications?
Peer-reviewed journals such as Nature, Science, and specialized publications like Peptides and the Journal of Peptide Science publish ongoing research. PubMed and Google Scholar are useful for searching studies by peptide name or condition.
Are there any guidelines for using peptides in research?
Research use of peptides typically follows institutional review board (IRB) protocols and regulatory guidelines. Dosage, administration route, and safety monitoring should align with published literature and applicable regulations in your jurisdiction.
What is the difference between peptides and proteins?
Peptides are short chains of amino acids (typically under 50), while proteins are longer chains that fold into complex structures. Peptides are often more stable, easier to synthesize, and can cross cell membranes more readily, making them attractive for therapeutic applications.
How should peptides be stored?
Most peptides require refrigeration (2–8°C) and protection from light. Reconstituted peptides often have shorter stability and may need to be used within days or weeks. Always follow the manufacturer's or research protocol's storage instructions.
Can peptides be taken orally?
Some peptides are bioavailable orally, but many are broken down by digestive enzymes before reaching the bloodstream. Subcutaneous injection, nasal administration, or other routes are often used in research to improve bioavailability. The optimal route depends on the specific peptide.
Cyclic Glycine-ProlineResearch References
Cyclic Glycine-Proline is a moderate research compound
Cyclic Glycine-Proline
Cyclic Glycine-Proline is a moderate research compound
IGF-1 Homeostasis Regulation Study
cGP regulates IGF-1 bioavailability through IGFBP-3 competitive binding
n.d.
Alzheimer's Mouse Model Study
Significantly improved spatial memory; reduced hippocampal plaques 42.3→14.5 per mm²
n.d.
Parkinson's Disease Clinical Study
Blackcurrant supplementation increased CSF cGP 74%; reduced anxiety/depression
n.d.
Stroke Recovery & Cognitive Function Review
Higher cGP/IGF-1 ratios associated with favorable stroke outcomes
n.d.