Is FGL legal?
FGL is not FDA approved as a finished drug. For drug-tested athletes it is not on the WADA prohibited list. Not prescribed in conventional medicine.. Legal status depends on your country and changes over time. This reflects US status at the time of writing and is not legal or medical advice.
Regulatory status
- FDA: Not FDA approved. Pre-clinical.
- WADA: Not listed
- Prescription: Not prescribed in conventional medicine.
References
- A synthetic NCAM-derived peptide, FGL, protects hippocampal neurons from ischemic insult both in vitro and in vivo — Skibo GG, Lushnikova IV, Voronin KY, Dmitrieva O, Novikova T, Klementiev B, Vaudano E, Berezin VA, Bock E. European Journal of Neuroscience, 2005
- The neural cell adhesion molecule-derived peptide, FGL, attenuates lipopolysaccharide-induced changes in glia in a CD200-dependent manner — Cox FF, Berezin V, Bock E, Lynch MA. Neuroscience, 2013
Pepdex is an editorial reference, not medical advice. Peptides vary in legal and approval status by country, many are research compounds without full human safety data. Talk to a qualified clinician before starting anything.
More on FGL
Last updated 2026-06-06.