FGL
Also known as: FGL peptide, NCAM mimetic
Fibroblast Growth Factor-Like peptide, an NCAM (Neural Cell Adhesion Molecule) mimetic that enhances neural plasticity. Promotes learning, memory, and neuroprotection.
Beginner Basics
Plain-English guide to FGL
What it does
FGL helps your brain cells communicate better and form stronger connections, which researchers study for improving memory, learning, and protecting brain cells from damage. It works by mimicking a natural brain messenger that supports how your brain adapts and learns new information.
Typical dose
Researchers typically use 1-5 mg once daily by injecting under the skin, usually starting at the lowest dose and gradually increasing based on how your body responds.
When to inject
Any time of day works fine-pick a time you'll remember consistently and stick with it.
Storage
Keep the dry powder in the freezer at -20°C (around 0°F). After mixing with liquid, store in the fridge at 2-8°C (35-46°F) and keep it away from direct light.
First-timer tip
Start at 1 mg to see how your body tolerates it before moving to higher doses, and keep detailed notes on how you feel and perform to track any changes.
On This Page
Research Status
Early Research
For research purposes only. Not approved for human use. Not medical advice.
Research Areas
Side Effects
Typically resolve within 24-48 hours. Rotate injection sites to minimize recurrence. Apply ice if swelling occurs. Ensure proper injection technique and sterile handling.
May occur in the first 1-2 weeks as the brain adjusts to enhanced neural signaling. Usually self-resolving. Stay hydrated and consider starting at a lower dose (1 mg) before titrating upward.
Enhanced neural activity may affect sleep in sensitive individuals. Consider injecting in the morning rather than evening. Typically resolves within 1-2 weeks as tolerance develops.
May occur if dose is too high or if injected too rapidly. Reduce dose and inject more slowly over 5 seconds. Ensure adequate hydration.
Uncommon with subcutaneous administration. If occurs, take with food or reduce dose. Discontinue if severe and consult a healthcare provider.
Develops with repeated injections in the same area. Prevent by rotating injection sites systematically with each dose. Maintain at least 1 inch spacing between injection points. Lipodystrophy may be reversible if site rotation is implemented early.
Discontinue immediately and seek medical attention if signs of allergic reaction develop (difficulty breathing, facial swelling, severe rash). FGL is a research compound with limited safety data in humans — monitor closely for any unusual reactions.
Dosing Reference
| Parameter | Value |
|---|---|
| Dose range | 1-5 mg |
Frequency, timing and route - members only | |
Research disclaimer
Figures drawn from published research literature and community logs. Not clinical recommendations. Consult a qualified professional. Research use only.
Reconstitution Guide
Do not use saline or bacteriostatic saline, use only bacteriostatic water for reconstitution
Do not shake the vial vigorously; gentle swirling prevents peptide degradation
Discard immediately if the solution appears cloudy, discolored, or contains visible particles
Use within 30 days of reconstitution when stored at 2-8°C
Do not freeze the reconstituted solution; freezing may denature the peptide
Use the PeptideVolt reconstitution calculator for your exact concentration
Molecular and Pharmacological Data
FGL is a synthetic peptide that mimics Neural Cell Adhesion Molecule (NCAM) and activates fibroblast growth factor receptors (FGFR) in the brain. This activation promotes synaptic plasticity, enhances long-term potentiation (LTP), and supports neuronal survival and growth. By mimicking NCAM signaling, FGL enhances learning and memory formation while providing neuroprotection against excitotoxic and inflammatory damage.
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Recent Research
Cholinergic Neuron Targeting Nanosystem Delivering Hybrid Peptide for Combinatorial Mitochondrial Therapy in Alzheimer's Disease.
Pharmacological approach for targeting dysfunctional brain plasticity: Focus on neural cell adhesion molecule (NCAM).
Age-related changes in the hippocampus (loss of synaptophysin and glial-synaptic interaction) are modified by systemic treatment with an NCAM-derived peptide, FGL.
Source: PubMed / NCBI. Updated daily. Articles are listed for research reference only.
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View all peptidesResearch Use Only. All content on this page is provided for informational and educational purposes related to scientific research. FGL is not approved for human use by the FDA or any equivalent regulatory body. This is not medical advice. Do not use any substance discussed here for therapeutic, diagnostic, or preventative purposes. Consult a qualified healthcare professional before making any health-related decisions. The Peptide Volt does not endorse the use of any research chemicals. 18+ only.