Olympian Labs L-Theanine, 400 mg, 60 Capsules supplement bottle
Olympian Labs

L-Theanine, 400 mg, 60 Capsules

What We Researched
1 active ingredient analyzed · 3 inactive ingredients decoded · 2 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
100
Product Score Excellent
66
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Theanine 400 mg *
Bioavailability Excellent

Absorption Rating

  • L-Theanine Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose (Plant Fiber)
  • Rice Flour
  • Magnesium Stearate and Silica
Efficacy Excellent

Dosage Analysis

  • L-Theanine 400 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Theanine 400 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose (Plant Fiber) Safe

It is used as a filler, binder, and disintegrant.

Rice Flour Safe

Natural bulking agent to fill capsule space. Hypoallergenic.

Magnesium Stearate and Silica Generally_safe

It is used to improve powder flow and prevent sticking during manufacturing.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$34$33$32$31$30 Mar 12 $32.19
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
Olympian Labs

Founded 1992 · Phoenix, Arizona, United States · 85 products · olympianlabsshop.com/

Certifications

2 certifications
Consumerlab Verified Source
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source

Violation History

2 incidents
Prop 65 Lead2018-09-05Source
Lawsuit Allegations that the products 'Medi-Phen' and 'Herp-Eeze' were not safe or effective for their advertised purposes of weight loss and relief of Herpes simplex viruses, respectively.2002Source
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Frequently Asked Questions
Is Olympian Labs L-Theanine, 400 mg a good supplement?

Olympian Labs L-Theanine, 400 mg, 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 30 servings per container. Of the 3 inactive ingredients, 2 are rated safe and 0 are flagged for review. The manufacturer, Olympian Labs, holds a brand trust score of 66/100 with 2 verified certifications including Consumerlab, Fda Gmp Inspections.

What are the ingredients in Olympian Labs L-Theanine, 400 mg?

Olympian Labs L-Theanine, 400 mg contains 1 active ingredients: L-Theanine (400 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Olympian Labs L-Theanine, 400 mg safe to take?

Olympian Labs L-Theanine, 400 mg, 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 Olympian Labs a trustworthy supplement brand?

Olympian Labs receives a brand trust score of 66/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1992 and headquartered in Phoenix, Arizona, United States, the company offers 85 products in their lineup. They hold 2 verified certifications including Consumerlab, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Olympian Labs has 2 historical regulatory incidents on record, which are factored into the trust score.

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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.