Phosphatidylserine
Scored by the Formulate Research Team · Last reviewed May 2026
Overview: Thorne Phosphatidylserine
Promotes healthy brain function, supports memory and focus, and modulates cortisol during stress* Thorne's Phosphatidylserine contains phosphatidylserine (PS), the primary phospholipid in brain cell membranes. PS improves cell communication to support memory and focus and helps regulate cortisol during stress.*
Score Breakdown
Formulate scores every product across six weighted dimensions. Each dimension is graded independently — hover or tap to see what drove each component.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| Phosphatidylserine Isolate | 300 mg |
Certifications & Testing
Other Ingredients
Cellulose Powder, Hypromellose Capsule, Microcrystalline Cellulose, Silicon Dioxide
Recommended Use
Take 1 capsule two to three times daily or as recommended by your health-care practitioner.
Warnings
ALLERGY WARNING This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients. PREGNANCY If pregnant, consult your health-care practitioner before using this product. INTERACTIONS There are no known adverse interactions or contraindications at publication date.
Frequently Asked Questions
What is Thorne Phosphatidylserine's Formulate score?
Thorne Phosphatidylserine scores 98 out of 100 (grade A) on Formulate's ingredient-level rubric, which weighs evidence quality, dose accuracy, bioavailability, transparency, safety, and manufacturing practices.
Is Thorne Phosphatidylserine worth it?
Thorne Phosphatidylserine scores 98/100 (grade A). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence, and it carries credible third-party testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Thorne Phosphatidylserine?
Each serving contains Phosphatidylserine Isolate (300 mg). Serving size: 1 Capsule. 60 servings per container.
How do I take phosphatidylserine?
Take 1 capsule two to three times daily or as recommended by your health-care practitioner.
Who makes Phosphatidylserine?
Phosphatidylserine is made by Thorne. See Formulate's full grade and product lineup for Thorne on its brand page.
Is Thorne Phosphatidylserine third-party tested?
Thorne lists the following certifications and testing for this product: NSF Certified, Gluten Free, Dairy Free, Thorne Verified, Natural Flavors, Natural Colors, GMP Certified.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.