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Sports Research L-Theanine, 200 mg supplement bottle
Sports Research

L-Theanine, 200 mg Review

What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 11 brand certifications checked · Page generated: Sep 2026
100
Product Score Excellent
100
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Theanine (Suntheanine®) 200 mg †
Bioavailability Excellent

Absorption Rating

  • L-Theanine (Suntheanine®) Good
Other Ingredients Excellent

Fillers & Additives

  • Gelatin
  • Vegetable Glycerin
  • Beeswax
  • Purified Water
Efficacy Excellent

Dosage Analysis

  • L-Theanine (Suntheanine®) 200 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Theanine (Suntheanine®) 200 mg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Vegetable Glycerin Safe

Helps form softgel capsule shells and acts as a humectant.

Beeswax Safe

Used as a coating and to help form softgel capsules.

Purified Water Safe

Dissolves and carries water-soluble ingredients.

Brand Trust Report
Sports Research

Founded 1980 · San Pedro, California, United States · 135 products · sportsresearch.com/

Certifications

11 certifications
Consumerlab Source available Primary evidence
Informed Sport Source available Primary evidence
Non Gmo Project Source available Primary evidence
Nsf Certified For Sport Source available Primary evidence
Gluten Free Gfco Source available Primary evidence
Usda Organic Source available Primary evidence
NSF Certified for Sport Supporting evidence unavailable
NSF Contents Certified Supporting evidence unavailable
Informed Choice Supporting evidence unavailable
IGEN Non-GMO Tested Supporting evidence unavailable
Vegan Action Certified Supporting evidence unavailable

Transparency

5 claims
Third Party Testing Claim — Verified Evidence available Evidence
Coa Availability — Claimed Brand claim; evidence unavailable
Testing Lab Disclosure — True Brand claim; evidence unavailable
Contains Proprietary Blend — True Brand claim; evidence unavailable

Violation History

4 incidents
Prop 65 Lead2024-11-15 Source available Primary source
Lawsuit False and misleading claims of "weight management" and "appetite suppression" on Garcinia Cambogia product.2024 Source available Primary source
Prop 65 Lead2021-10-25 Source available Primary source
Lawsuit False and misleading claims on the labeling of Premium MCT Oil and Turmeric Curcumin C3 Complex products.2020 Source available Primary source
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Frequently Asked Questions
Is Sports Research L-Theanine, 200 mg a good supplement?

Sports Research L-Theanine, 200 mg 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 120 servings per container. All 4 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Sports Research, holds a brand trust score of 100/100.

What are the ingredients in Sports Research L-Theanine, 200 mg?

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

Is Sports Research L-Theanine, 200 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for Sports Research L-Theanine, 200 mg. All 4 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Sports Research a trustworthy supplement brand?

Sports Research receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1980 and headquartered in San Pedro, California, United States, the company offers 135 products in their lineup. Note: Sports Research has 4 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 — read our methodology. 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.