Pure Encapsulations L-Tryptophan supplement bottle
Pure Encapsulations

L-Tryptophan Review

What We Researched
2 active ingredients analyzed · 2 inactive ingredients decoded · 4 brand certifications checked · Page generated: Sep 2026
93
Product Score Excellent
81
Brand Score Good

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
Vitamin B6 (as Pyridoxal 5-Phosphate) 6.7 mg 394%
TryptoPure L-Tryptophan 1000 mg †
Bioavailability Very Good

Absorption Rating

  • Vitamin B6 (as Pyridoxal 5-Phosphate) Fair
  • TryptoPure L-Tryptophan Good
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Water
Efficacy Excellent

Dosage Analysis

  • Vitamin B6 (as Pyridoxal 5-Phosphate) 6.7 mg Effective
  • TryptoPure L-Tryptophan 1000 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin B6 (as Pyridoxal 5-Phosphate) 6.7 mg 394%
TryptoPure L-Tryptophan 1000 mg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Water Safe

Dissolves and carries water-soluble ingredients.

Brand Trust Report
Pure Encapsulations

Founded 1991 · Sudbury, Massachusetts, United States · 228 products · pureencapsulations.com

Certifications

4 certifications
Fda Gmp Inspections Source available Primary evidence
Nsf Gmp Source available Primary evidence
NSF Certified Supporting evidence unavailable
Gluten-Free Certified Supporting evidence unavailable

Transparency

4 claims
Third Party Testing Claim — Verified Evidence available Evidence
Testing Lab Disclosure — Verified Evidence available Evidence
Contains Proprietary Blend — True Brand claim; evidence unavailable
Related Supplements
Frequently Asked Questions
Is Pure Encapsulations L-Tryptophan a good supplement?

Pure Encapsulations L-Tryptophan received a product quality score of 93/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 2 active ingredients with 90 servings per container. All 2 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Pure Encapsulations, holds a brand trust score of 81/100.

What are the ingredients in Pure Encapsulations L-Tryptophan?

Pure Encapsulations L-Tryptophan contains 2 active ingredients: Vitamin B6 (as Pyridoxal 5-Phosphate) (6.7 mg), TryptoPure L-Tryptophan (1000 mg). Notable high-dose ingredients include Vitamin B6 at 394% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Pure Encapsulations L-Tryptophan safe to take?

GoodSupp reviewed the inactive-ingredient data available for Pure Encapsulations L-Tryptophan. All 2 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 Pure Encapsulations a trustworthy supplement brand?

Pure Encapsulations receives a brand trust score of 81/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1991 and headquartered in Sudbury, Massachusetts, United States, the company offers 228 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.