Thorne Phosphatidylserine 100 mg supplement bottle
Thorne

Phosphatidylserine 100 mg Review

What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 10 brand certifications checked · Last updated: Aug 2026
100
Product Score Excellent
98
Brand Score Excellent

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
Phosphatidylserine Isolate 100 mg *
Bioavailability Excellent

Absorption Rating

  • Phosphatidylserine Isolate Good
Other Ingredients Excellent

Fillers & Additives

  • Hypromellose (Derived from Cellulose) Capsule
  • Microcrystalline Cellulose
  • Silicon Dioxide
  • Leucine
Efficacy Excellent

Dosage Analysis

  • Phosphatidylserine Isolate 100 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Phosphatidylserine Isolate 100 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hypromellose (Derived from Cellulose) Capsule Safe

It is used to encapsulate supplement ingredients.

Microcrystalline Cellulose Safe

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

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Leucine Safe

It is used for its potential muscle-building and recovery benefits.

Brand Trust Report
Thorne

Founded 1984 · New York, NY, United States · 204 products · thorne.com

Certifications

10 certifications
Nsf Certified For Sport Verified Source
Nsf Gmp Verified Source
Fda Gmp Inspections Verified Source
NSF Certified for Sport Verified
NSF Contents Certified Verified
Informed Choice Verified
Informed Sport Verified
Eurofins Certified Supplement Verified
Eurofins Clean Sport Verified
NSF Certified Verified

Transparency

4 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source

Violation History

2 incidents
Recall Captomer, Captomer-2502014-06-12Source
Prop 65 Lead2013-12-13Source
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Frequently Asked Questions
Is Thorne Phosphatidylserine 100 mg a good supplement?

Thorne Phosphatidylserine 100 mg 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 All 4 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Thorne, holds a brand trust score of 98/100 with 10 verified certifications including Nsf Certified For Sport, Nsf Gmp, Fda Gmp Inspections, NSF Certified for Sport.

What are the ingredients in Thorne Phosphatidylserine 100 mg?

Thorne Phosphatidylserine 100 mg contains 1 active ingredients: Phosphatidylserine Isolate (100 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Thorne Phosphatidylserine 100 mg safe to take?

Thorne Phosphatidylserine 100 mg has been analyzed for ingredient safety across all its components. All 4 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 Thorne a trustworthy supplement brand?

Thorne receives a brand trust score of 98/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1984 and headquartered in New York, NY, United States, the company offers 204 products in their lineup. They hold 10 verified certifications including Nsf Certified For Sport, Nsf Gmp, Fda Gmp Inspections, NSF Certified for Sport. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Thorne 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.