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Head-to-head evidence comparison — which supplement is right for you?
L-Theanine vs Shatavari: L-Theanine has the stronger overall evidence (6 vs 5/10); they're alternatives for reduce anxiety & stress — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
L-Theanine wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
4 of 5 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
5 of 5 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both L-Theanine and Shatavari 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
500-1000mg root extract, 1-2x daily
With meals, Morning and evening
Root extract standardized to saponins
30-60 minutes
30-60 minutes
30-60 minutes
Varies
4-12 weeks
4-8 weeks
1-2 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).
Oral galactagogues (natural therapies or drugs) for increasing breast milk production in mothers of non-hospitalised term infants
The Cochrane database of systematic reviews (2020) · Meta analysis · n=20
Only one study (metoclopramide) reported on the outcome of infant weight, finding little or no difference (mean difference (MD) 23.0 grams, 95% confidence interval (CI) -47.71 to 93.71; 1 study, 20 participants; low-certainty evidence).
Modulation of Various Pharmacological Pathways by Asparagus Saponins: Special Emphasis on Shatavarin-IV
Chemistry & biodiversity (2026) · Review
Shatavarin-IV is regarded as the most important steroidal saponin responsible for most of the pharmacological effects of Shatavari.
Shatavari (Asparagus racemosus Willd) root extract for postpartum lactation: A randomised, double-blind, placebo-controlled study
Journal of obstetrics and gynaecology : the journal of the Institute of Obstetrics and Gynaecology (2025) · Rct · n=113
Maternal satisfaction with lactation was higher in the SHT group (52.63% vs. 25.00%, p = 0.008).
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.
Based on single RCT (n=113) showing improved maternal satisfaction (52.63% vs 25%). Meta-analysis notes limitations in galactagogue studies including small sample sizes and poor blinding methods.
AI-estimated from published studies. Interpret as directional guidance.
L-Theanine has a higher evidence score (6/10 vs 5/10) and wins in 2 of 3 categories.
For reduce anxiety & stress, L-Theanine has a higher relevance score (85 vs 32).
No known interactions between L-Theanine and Shatavari have been documented in our database. However, always consult a healthcare provider before combining supplements.
The honest tier list — proven staples vs situational vs mostly marketing. The hub the other guides feed into.
Caffeine+L-theanine works; bacopa needs weeks; most "brain pills" are hype. The honest tier list.
Ashwagandha, L-theanine, magnesium, saffron — what actually helps stress, and the safety caveats.
Melatonin, magnesium, glycine, L-theanine — tiered by evidence, plus a wind-down timeline.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.