Source Naturals L-Tryptophan 500 mg supplement bottle
Source Naturals

L-Tryptophan 500 mg

What We Researched
1 active ingredient analyzed · 1 brand certification checked · 1 retailer compared · Last updated: Mar 2026
87
Product Score Good
66
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Tryptophan 1.5 g
Bioavailability Excellent

Absorption Rating

  • L-Tryptophan Good
Other Ingredients Fair

Fillers & Additives

No inactive ingredient data available.

Efficacy Excellent

Dosage Analysis

  • L-Tryptophan 1.5 g Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Tryptophan 1.5 g

Price Comparison

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

Brand Trust Report
Source Naturals

Founded 1982 · Scotts Valley, CA, USA · 837 products · sourcenaturals.com/

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source
Related Supplements
Frequently Asked Questions
Is Source Naturals L-Tryptophan 500 mg a good supplement?

Source Naturals L-Tryptophan 500 mg received a product quality score of 87/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 1 active ingredients with 66 servings per container. The manufacturer, Source Naturals, holds a brand trust score of 66/100 with 1 verified certifications including Fda Gmp Inspections.

What are the ingredients in Source Naturals L-Tryptophan 500 mg?

Source Naturals L-Tryptophan 500 mg contains 1 active ingredients: L-Tryptophan (1.5 g). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Source Naturals L-Tryptophan 500 mg safe to take?

Source Naturals L-Tryptophan 500 mg 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 Source Naturals a trustworthy supplement brand?

Source Naturals receives a brand trust score of 66/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1982 and headquartered in Scotts Valley, CA, USA, the company offers 837 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.

Scan Any Supplement Instantly

Download GoodSupp to scan barcodes, check ingredient safety, and find the best supplements for your needs.

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.