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Head-to-head evidence comparison — which supplement is right for you?
L-Theanine and Lavender are closely matched across evidence, studies, and safety.
Verdict
Likely helps
4 of 5 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
Shared outcomes (2)
Outcomes where both L-Theanine and Lavender have evidence — compare verdict strength side-by-side.
100-200mg
Morning with coffee for focus, Evening for relaxation, As needed for stress
Suntheanine® capsules or powder
80 mg oral Silexan daily OR aromatherapy inhalation 30–60 min sessions
Evening before bed for sleep and anxiety, Acute use before stressful procedures or events
Oral Silexan capsule (80 mg) for systemic/psychiatric use
30-60 minutes
30-60 minutes
30-60 minutes
Varies
1–4 weeks
1–3 weeks
4–8 weeks
Acute to 2 weeks
The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis
Sleep medicine reviews (2025) · Meta analysis · n=897
The findings indicate the potential use of L-theanine in the management of sleep disturbances; however, the lack of studies on "pure" L-theanine warrants further investigation.
Efficiency of Different Supplements in Alleviating Symptoms of ADHD with or Without the Use of Stimulants: A Systematic Review
Nutrients (2025) · Systematic review
The evidence revealed the potential use of supplements as complementary ADHD treatments under clinical guidance.
Analysis of the Effects of Known Sleep-Support Supplements in Relation to Life Habits, Sleep Conditions, and Sleep Problems
Nutrients (2023) · Rct · n=160
All the tested supplements were found to ameliorate sleep problems significantly (Analysis 1).
Effects of lavender on anxiety: A systematic review and meta-analysis.
Phytomedicine : international journal of phytotherapy and phytopharmacology (2019) · Meta analysis
Meta-analysis confirmed significant anxiolytic effects of lavender across multiple administration routes
Efficacy of Silexan in patients with anxiety disorders: a meta-analysis of randomized, placebo-controlled trials.
European archives of psychiatry and clinical neuroscience (2023) · Meta analysis
Silexan 80 mg/day was significantly superior to placebo in reducing Hamilton Anxiety Rating Scale (HAMA) total scores
Efficacy of Silexan in subthreshold anxiety: meta-analysis of randomised, placebo-controlled trials.
European archives of psychiatry and clinical neuroscience (2019) · Meta analysis
Silexan 80 mg/day significantly reduced HAMA scores compared to placebo in subthreshold anxiety
Meta-analysis (n=897) and multiple RCTs support sleep benefits. Studies often used L-theanine in combination with other compounds, limiting pure L-theanine effect attribution. Effects include reduced sleep onset latency and improved subjective sleep quality.
AI-estimated from published studies. Interpret as directional guidance.
Both L-Theanine and Lavender are closely matched — the best choice depends on your specific health goals.
For reduce anxiety & stress, Lavender has a higher relevance score (90 vs 85).
No known interactions between L-Theanine and Lavender have been documented in our database. However, always consult a healthcare provider before combining supplements.