Performance Category
FGL-L
THE SYNAPSE ENHANCER
Neural Cell Adhesion Molecule-derived FGL peptide
FGL-L is a synthetic peptide that mimics neural cell adhesion molecule (NCAM), a protein crucial for brain cell communication and plasticity. It activates growth factor receptors to promote synapse formation, enhance memory, and protect neurons.
FGL-L Evidence Snapshot
How these guides are reviewed- Regulatory status
- Not FDA approved · research use only
- Dosing guidance
- Reviewed by our clinical team
- Linked evidence
- Sources pending
- Content updated
- Aug 28, 2026
Dose and schedule recommendations shown below come from The Peptide App Clinical Team. Research links are provided so readers can inspect the supporting evidence directly.
Quick Answers About FGL-L
Is FGL-L FDA approved?
No. This profile records FGL-L as not FDA approved and for research use only.
More context
Review the regulatory and source details on this page for the current context.
What dose does The Peptide App Clinical Team recommend for FGL-L?
Dose: Research dosing varies.
More context
No established human protocol. Schedule: daily. Cycle: As needed for research. This is clinical-team guidance for reference and does not replace individualized instructions from a licensed clinician.
What research supports this FGL-L guide?
No linked research sources are currently available on this guide.
More context
Treat the profile as provisional until supporting sources are published.
What are the side effects of FGL-L?
Reported side effects of FGL-L include Injection site irritation and Occasional nausea at higher doses.
More context
They are reported or occasional reactions, not a prediction of what any one person will experience.
Is FGL-L safe?
FGL-L has an editorial safety grade of B (Good Safety).
More context
Generally well-tolerated in preclinical studies. Limited human data. Safety depends on dose, sourcing, health history and medical supervision, so this page does not call it safe for personal use.
Studied Effects & Mechanisms
FGFR Activation
Activates fibroblast growth factor receptors for brain growth
Synapse Strengthening
Increases AMPA receptor availability for stronger connections
Neuroprotection
Protects neurons from damage and degeneration
Who is this for
Those with memory concerns · Researchers studying neuroplasticity · Students or professionals needing mental performance
FGL-L price snapshot
In-stock prices from 2 vendors, checked Oct 14, 2026.
- Vendors
- 2
- Listings
- 4
- Observed range
- $36–$100
Market evidence
FGL-L product testing and COAs
We found certificates from some of the FGL-L vendors we track. Based on the certificates our crawler found; vendors may publish more than we index. Research on this page describes the molecule. Vendor certificates concern particular market samples or batches; they do not change the research evidence or establish clinical safety, sterility, or suitability for use.
The clinic network
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