Amino Acid
Phenylalanine
An essential amino acid that serves as a precursor to dopamine, norepinephrine, and other neurotransmitters.
KÖGN Health grades Phenylalanine as B+ (Moderate evidence) and rates it 3.9 out of 5.
Last reviewed · June 2026
Primary effects
- Improved mood
- Increased motivation
- Cognitive support
How it works
Supports neurotransmitter synthesis involved in mood, motivation, and cognitive function.
Overview
Phenylalanine is a dietary amino acid that contributes to the production of key neurotransmitters involved in alertness and mood regulation. Its cognitive effects are generally subtle and depend on individual nutritional status and metabolic needs. It is more effective as a foundational nutritional support compound rather than a targeted performance enhancer.
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.