NutriStack
Ashwagandha and L-Theanine, a synergy.
Both are studied for relaxation, perceived-stress, and calm-focus markers; direct combination evidence is limited.
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
- Ashwagandha and L-Theanine
- 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. Both are studied for relaxation, perceived-stress, and calm-focus markers; direct combination evidence is limited.
Mechanism. L-theanine has alpha-wave and glutamate-signaling research. Ashwagandha extracts have been studied for stress-related wellness markers, but cortisol effects vary by extract and population.
Recommendation. Use as a wellness-support pairing only. Do not present the combination as anxiety treatment, and use extra caution with sedatives or psychiatric medications.
Sources (2)
- Nobre AC et al. L-theanine, a natural constituent in tea, and its effect on mental state. Asia Pac J Clin Nutr. 2008
- Payne ER, Aceves-Martins M, Dubost J et al.. Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.. Nutrition Reviews. 2025. PMID 40314930
Stack Score
How this pair moves the number.
Effect on the composite score
If both Ashwagandha and L-Theanine 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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