At 200mg per capsule, you're getting the most commonly studied dose of **L-Theanine** for promoting calm without drowsiness. This sits right in the clinical sweet spot (100–250mg) used in trials on relaxation, stress response, and sleep quality — so one capsule daily covers you for all three goals.
**L-Theanine** works by boosting alpha brain waves, which are associated with a relaxed-but-alert mental state. If your main goal is better sleep, the research suggests taking it 30–60 minutes before bed. For daytime calm and focus — especially if you drink coffee — it pairs well with caffeine to smooth out jitteriness while keeping you sharp.
The one thing to know: evidence for theanine is moderate, not ironclad. Most studies are small and short-term. You'll likely notice a subtle calming effect rather than anything dramatic, and individual response varies.
California Gold Nutrition
L-Theanine 200 mg
Capsule · 60 servings · $0.17/serving
Supports
Score Breakdown
Ingredients (1)
Optimal dose
Label Nutrition Facts
Active Ingredients
From the label · % Daily Value
L-Theanine200 mg
Other Ingredients
Fillers, coatings, and additives
Silicon DioxideAnti-caking
Microcrystalline CelluloseBinder
Microcrystalline CelluloseBinder
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.