Nature's Life L-Theanine, 60 Vegetarian Capsules supplement bottle
Nature's Life

L-Theanine, 60 Vegetarian Capsules

What We Researched
2 active ingredients analyzed · 2 inactive ingredients decoded · 1 brand certification checked · 1 retailer compared · Last updated: Mar 2026
81
Product Score Good
66
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Theanine 400 mg *
Green Tea (Camellia sinensis) (leaf) 200 mg *
Bioavailability Very Good

Absorption Rating

  • L-Theanine Good
  • Green Tea (Camellia sinensis) (leaf) Fair
Other Ingredients Excellent

Fillers & Additives

  • Vegetable Cellulose Capsule
  • Cellulose and organic rice extract blend
Efficacy Fair

Dosage Analysis

  • L-Theanine 400 mg Effective
  • Green Tea (Camellia sinensis) (leaf) 200 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
L-Theanine 400 mg *
Green Tea (Camellia sinensis) (leaf) 200 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Vegetable Cellulose Capsule Safe

Vegetarian/vegan capsule shell.

Cellulose and organic rice extract blend Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$20$19$18$17$16 Mar 12 $18.00
iHerb

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

Brand Trust Report
Nature's Life

Founded 1975 · Ogden, Utah, USA · 129 products · natureslife.com/

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source
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Frequently Asked Questions
Is Nature's Life L-Theanine, 60 Vegetarian Capsules a good supplement?

Nature's Life L-Theanine, 60 Vegetarian Capsules received a product quality score of 81/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 2 active ingredients with 30 servings per container. Of the 2 inactive ingredients, 1 are rated safe and 0 are flagged for review. The manufacturer, Nature's Life, holds a brand trust score of 66/100 with 1 verified certifications including Fda Gmp Inspections.

What are the ingredients in Nature's Life L-Theanine, 60 Vegetarian Capsules?

Nature's Life L-Theanine, 60 Vegetarian Capsules contains 2 active ingredients: L-Theanine (400 mg), Green Tea (Camellia sinensis) (leaf) (200 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature's Life L-Theanine, 60 Vegetarian Capsules safe to take?

Nature's Life L-Theanine, 60 Vegetarian 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 Nature's Life a trustworthy supplement brand?

Nature's Life receives a brand trust score of 66/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1975 and headquartered in Ogden, Utah, USA, the company offers 129 products in their lineup. They hold 1 verified certifications including Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. No regulatory violations or FDA warning letters were found in our research.

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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.