FGL-S

FGL-S, also known as the FGL peptide or FG Loop peptide, is a synthetic peptide designed to mimic functional motifs in neural cell adhesion molecules. It functions by enhancing neuronal growth and synaptic plasticity, which are crucial for learning and memory processes. FGL-S first drew attention for its potential role in neuroregeneration and neuroprotection. Researchers have been particularly interested in its ability to interact with specific receptors in the brain, facilitating improved cognitive function. It is also being studied for its effects on long-term potentiation and neuronal repair. Today, it is primarily studied for its effects on:

• Neuroprotection
• Cognitive enhancement
• Neuronal growth

Studies are ongoing to explore its role in neurodegenerative disease models.

PeptideSource editorial · Updated Jul 19, 2026