Everything DoseRank tracks on the l-theanine shelf — L-Theanine and Lemon Balm. The category itself is never ranked: 156 products get scored the moment you say what you want them to do.
How to read the scores
This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →
Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.
A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.
Questions
Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value — computed for the goal you picked, across this category's products. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.
Start with a goal, not a brand
Browsing l-theanine supplements without a goal makes no sense — different products do different jobs, and “best” flips depending on which job you're hiring for. These are the 45 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Calmness or relaxationReduced tension and greater sense of calm.124 rankedStrong
Attention and concentrationAbility to sustain and direct focus.124 rankedModerate-strong
Anxiety symptomsWorry, tension, fear, or related anxiety manifestations.126 rankedStrong
Sleep qualityOverall restfulness and perceived quality of sleep.138 rankedModerate-strong
Reaction timeSpeed of physical or cognitive response to a stimulus.10 rankedStrong
Sleep latencyTime needed to fall asleep.21 rankedStrong
Blood pressureArterial pressure; direction of benefit depends on baseline status.131 rankedModerate-strong
Perceived exertionSubjective difficulty of physical effort.9 rankedStrong
Fat oxidationUse of fat as an energy source.35 rankedModerate-strong
PCOS symptom burdenClinical burden of polycystic ovary syndrome symptoms.19 rankedModerate-strong
Menstrual regularityMore predictable and regular menstrual cycles.16 rankedStrong
OvulationOccurrence and quality of ovulatory cycles.16 rankedStrong
Fasting insulinBaseline insulin concentration.16 rankedStrong
Insomnia severityDegree of difficulty initiating or maintaining sleep.17 rankedStrong
Premenstrual symptom severityBurden of PMS-related mood or physical symptoms.28 rankedModerate-strongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best l-theanine supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 156 products against that goal's trials.