DaVinci Laboratories L-Theanine, 200 mg, 120 Capsules supplement bottle
DaVinci Laboratories

L-Theanine, 200 mg, 120 Capsules

What We Researched
1 active ingredient analyzed · 3 inactive ingredients decoded · 3 brand certifications checked · 3 retailers compared · Last updated: Mar 2026
100
Product Score Excellent
82
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Theanine Suntheanine® brand) 200 mg *
Bioavailability Excellent

Absorption Rating

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

Fillers & Additives

  • Microcrystalline Cellulose
  • Vegetable Cellulose (Capsule)
  • Vegetarian Leucine
Efficacy Excellent

Dosage Analysis

  • L-Theanine Suntheanine® brand) 200 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Theanine Suntheanine® brand) 200 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Vegetable Cellulose (Capsule) Safe

It is used as a material for making vegetarian capsules.

Vegetarian Leucine Safe

It provides a source of the essential amino acid leucine.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$87$78$70$61$53 Mar 12 $80.20$59.00
iHerb
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
DaVinci Laboratories

Founded 1973 · Williston, VT, US · 192 products · davincilabs.com/

Certifications

3 certifications
Consumerlab Verified Source
Fda Gmp Inspections Verified Source
Nsf Gmp Verified Source

Transparency

3 claims
Third Party Testing Claim — Verified Source
In House Testing — Verified Source

Violation History

2 incidents
Recall Amyloid Complete2024-05-08Source
Recall Dim Plex2019-07-11Source
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Frequently Asked Questions
Is DaVinci Laboratories L-Theanine, 200 mg a good supplement?

DaVinci Laboratories L-Theanine, 200 mg, 120 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 120 servings per container. All 3 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, DaVinci Laboratories, holds a brand trust score of 82/100 with 3 verified certifications including Consumerlab, Fda Gmp Inspections, Nsf Gmp.

What are the ingredients in DaVinci Laboratories L-Theanine, 200 mg?

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

Is DaVinci Laboratories L-Theanine, 200 mg safe to take?

DaVinci Laboratories L-Theanine, 200 mg, 120 Capsules has been analyzed for ingredient safety across all its components. All 3 inactive ingredients — including capsule materials, fillers, and binders — are rated safe based on regulatory data and published safety research. This is a clean formulation with no controversial additives. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is DaVinci Laboratories a trustworthy supplement brand?

DaVinci Laboratories receives a brand trust score of 82/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1973 and headquartered in Williston, VT, US, the company offers 192 products in their lineup. They hold 3 verified certifications including Consumerlab, Fda Gmp Inspections, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: DaVinci Laboratories 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.