Premier Research Labs L-Theanine, 60 Capsules supplement bottle
Premier Research Labs

L-Theanine, 60 Capsules

What We Researched
1 active ingredient analyzed · 3 inactive ingredients decoded · 1 retailer compared · Last updated: Mar 2026
100
Product Score Excellent
62
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Theanine 200 mg *
Bioavailability Excellent

Absorption Rating

  • L-Theanine Good
Other Ingredients Excellent

Fillers & Additives

  • Organic Rice Concentrate
  • Plant source capsules (cellulose, water)
  • Organic rice bran
Efficacy Excellent

Dosage Analysis

  • L-Theanine 200 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Theanine 200 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Organic Rice Concentrate Generally_safe

It is used as a natural flow agent to prevent clumping and improve powder flow during manufacturing.

Plant source capsules (cellulose, water) Unknown
Organic rice bran Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$27$26$25$24$23 Mar 12 $25.14
Vitacost

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Premier Research Labs

· Austin, Texas, USA · 29 products · prlabs.com

Transparency

2 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source
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Frequently Asked Questions
Is Premier Research Labs L-Theanine, 60 Capsules a good supplement?

Premier Research Labs L-Theanine, 60 Capsules received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 60 servings per container. Of the 3 inactive ingredients, 0 are rated safe and 0 are flagged for review. The manufacturer, Premier Research Labs, holds a brand trust score of 62/100.

What are the ingredients in Premier Research Labs L-Theanine, 60 Capsules?

Premier Research Labs L-Theanine, 60 Capsules contains 1 active ingredients: L-Theanine (200 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Premier Research Labs L-Theanine, 60 Capsules safe to take?

Premier Research Labs L-Theanine, 60 Capsules has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Premier Research Labs a trustworthy supplement brand?

Premier Research Labs receives a brand trust score of 62/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. the company offers 29 products in their lineup.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.