Amino Acid
Glycine
An amino acid that supports sleep quality, relaxation, and cognitive recovery.
KÖGN Health grades Glycine as B (Moderate evidence) and rates it 3.8 out of 5.
Last reviewed · June 2026
Primary effects
- Improved sleep
- Relaxation
- Cognitive recovery
How it works
Acts as an inhibitory neurotransmitter, promoting relaxation and improved sleep.
Overview
Glycine plays a role in regulating the nervous system and improving sleep quality, which directly impacts cognitive performance. It is often used before bed to enhance recovery and next-day mental clarity. While it does not provide direct cognitive stimulation, its role in recovery makes it valuable for sustained performance.
Related ingredients
Graded entries that target the same cognitive goals.
Categories
Educational information, not medical advice. The evidence grade is KÖGN’s editorial assessment of published research, not a health claim. Speak to a qualified clinician before changing what you take.