NutriStack
L-Theanine and L-Tyrosine, a synergy.
L-Tyrosine supports catecholamine production for alertness under stress while L-theanine promotes calm focus, so the pair tends to deliver activated attention without as much of the jittery edge of stimulation alone.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- L-Theanine and L-Tyrosine
- Pair type
- Synergy
- Evidence (highest tier)
- Emerging
- Source citations
- 2 sources
- Stack Score effect
- +2 to your Stack Score (per scored synergy row).
- Scope
- Supplement × Supplement
- Last verified
- May 30, 2026
Synergy · Emerging evidence
Synergy
What is happening. L-Tyrosine supports catecholamine production for alertness under stress while L-theanine promotes calm focus, so the pair tends to deliver activated attention without as much of the jittery edge of stimulation alone.
Mechanism. L-Tyrosine is the precursor for dopamine and noradrenaline (activating), whereas L-theanine increases alpha brain-wave activity and modulates glutamate and GABA tone (calming), giving balanced catecholaminergic arousal.
Recommendation. Reasonable nootropic stack for focus under stress. A common pairing is L-tyrosine 500mg to 2000mg with L-theanine 100mg to 200mg taken earlier in the day.
Sources (2)
- Jongkees BJ et al. Effect of tyrosine supplementation on clinical and healthy populations under stress or cognitive demands. Journal of Psychiatric Research. 2015
- Nobre AC et al. L-theanine, a natural constituent in tea, and its effect on mental state. Asia Pacific Journal of Clinical Nutrition. 2008
Stack Score
How this pair moves the number.
Effect on the composite score
If both L-Theanine and L-Tyrosine are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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