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Walgreens L-Theanine 200 mg supplement bottle
Walgreens

L-Theanine 200 mg Review

What We Researched
1 active ingredient analyzed · 7 inactive ingredients decoded · 1 brand certification checked · Page generated: Sep 2026
97
Product Score Excellent
65
Brand Score Fair

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 200 mg —
Bioavailability Excellent

Absorption Rating

  • L-Theanine Good
Other Ingredients Excellent

Fillers & Additives

  • Polyethylene Glycol Low
  • Sodium Lauryl Sulfate Low
  • Dicalcium Phosphate
  • Gelatin
  • Magnesium Stearate
  • Acetic acid
  • Silicon Dioxide
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.

Polyethylene Glycol Caution

It is used as a binder, coating agent, or to improve solubility.

Sodium Lauryl Sulfate Caution

It is used to help mix oil and water-based ingredients.

Dicalcium Phosphate Safe

Serves as both a filler and a supplemental source of calcium and phosphorus.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Acetic acid Unknown
Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Brand Trust Report
Walgreens

· 38 products · walgreens.com/

Certifications

1 certification
Non-GMO Project Verified Supporting evidence unavailable

Transparency

2 claims
Third Party Testing Claim — True Brand claim; evidence unavailable
Testing Lab Disclosure — True Brand claim; evidence unavailable
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Frequently Asked Questions
Is Walgreens L-Theanine 200 mg a good supplement?

Walgreens L-Theanine 200 mg received a product quality score of 97/100 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 7 inactive ingredients, 4 are rated safe and 2 ingredients are flagged for review. The manufacturer, Walgreens, holds a brand trust score of 65/100.

What are the ingredients in Walgreens L-Theanine 200 mg?

Walgreens L-Theanine 200 mg 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 Walgreens L-Theanine 200 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for Walgreens L-Theanine 200 mg. Of 7 inactive ingredients, 4 are rated safe. 2 ingredients are flagged for review: Polyethylene Glycol, Sodium Lauryl Sulfate. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. 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 Walgreens a trustworthy supplement brand?

Walgreens receives a brand trust score of 65/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. the company offers 38 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 — 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.