NatureBell L-Tryptophan Complex supplement bottle
NatureBell

L-Tryptophan Complex Review

What We Researched
3 active ingredients analyzed · 4 inactive ingredients decoded · 1 brand certification checked · Page generated: Sep 2026
95
Product Score Excellent
60
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
Proprietary Tryptophan Complex Blend 1500 mg —
L-Tryptophan 1300 mg —
L-Theanine 200 mg —
Bioavailability Very Good

Absorption Rating

  • Proprietary Tryptophan Complex Blend Fair
  • L-Tryptophan Good
  • L-Theanine Good
Other Ingredients Excellent

Fillers & Additives

  • Magnesium Stearate
  • Gelatin
  • Rice Flour
  • Silicon Dioxide
Efficacy Excellent

Dosage Analysis

  • L-Tryptophan 1300 mg Effective
  • L-Theanine 200 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Proprietary Tryptophan Complex Blend 1500 mg
L-Tryptophan 1300 mg
L-Theanine 200 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Rice Flour Safe

Natural bulking agent to fill capsule space. Hypoallergenic.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Brand Trust Report
NatureBell

Founded 2017 · 4951 Holt Blvd Ste C, Montclair, CA 91763, USA · naturebell.com

Certifications

1 certification
USDA Organic Supporting evidence unavailable

Transparency

3 claims
Third Party Testing Claim — Claimed Brand claim; evidence unavailable
Contains Proprietary Blend — True Brand claim; evidence unavailable

Violation History

2 incidents
Prop 65 Prop 65 Violation2025-09-18 Source available Primary source
Prop 65 Prop 65 Violation2020-10-06 Source available Primary source
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Frequently Asked Questions
Is NatureBell L-Tryptophan Complex a good supplement?

NatureBell L-Tryptophan Complex received a product quality score of 95/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 3 active ingredients with 100 servings per container. All 4 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, NatureBell, holds a brand trust score of 60/100.

What are the ingredients in NatureBell L-Tryptophan Complex?

NatureBell L-Tryptophan Complex contains 3 active ingredients: Proprietary Tryptophan Complex Blend (1500 mg), L-Tryptophan (1300 mg), L-Theanine (200 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is NatureBell L-Tryptophan Complex safe to take?

GoodSupp reviewed the inactive-ingredient data available for NatureBell L-Tryptophan Complex. 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 NatureBell a trustworthy supplement brand?

NatureBell receives a brand trust score of 60/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2017 and headquartered in 4951 Holt Blvd Ste C, Montclair, CA 91763, USA, Note: NatureBell 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 — 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.