NOW Foods
Phosphatidylserine Review
FDA-qualified claim supplement for cognitive decline
Last updated: October 10, 2026 · Editorial review
About the score: the 9.6/10 and the stars are computed, not chosen — four axes worth ten points, every input printed on this page. The full breakdown is in How This Score Was Built below, and the method is on our About page. It is not a laboratory result and not an average of user ratings.
Quick Summary
Our Verdict
Pros
- ✓FDA-qualified health claim for cognitive decline
- ✓Multiple clinical trials in human subjects
- ✓Reduces cortisol — dual cognitive and stress benefits
- ✓NOW Foods is a highly trusted brand
Cons
- ✗Works best over long term (months)
- ✗Soy-derived (some prefer sunflower-derived)
- ✗Not a stimulant — won't give quick focus boost
Best For
Adults 40+ seeking evidence-based protection against age-related cognitive decline and memory loss.
What Is Phosphatidylserine?
Phosphatidylserine is a memory brain health supplement manufactured by NOW Foods. It's designed for adults 40+ seeking evidence-based protection against age-related cognitive decline and memory loss.
The formula is positioned as fda-qualified claim supplement for cognitive decline. In this comprehensive review, we examine each ingredient against the published clinical literature, evaluate the dosing accuracy, and provide an honest assessment of whether Phosphatidylserine is worth your investment in 2026.
Key Ingredients & Scientific Evidence
| Ingredient | Dose | Evidence | Effect |
|---|---|---|---|
| Phosphatidylserine (from soy) | 100mg | Strong | Memory, cognitive aging, cortisol reduction |
How Does Phosphatidylserine Work?
Phosphatidylserine works through multiple synergistic mechanisms targeting the primary cognitive domains it's designed to support. The formula from NOW Foods combines ingredients that work on neurotransmitter synthesis, cerebral blood flow, neuronal membrane health, and mitochondrial energy production.
The ingredient profile targets memory brain health via Phosphatidylserine (from soy) — compounds with established mechanisms in peer-reviewed literature. Full effects typically develop over 2-8 weeks of consistent daily use.
How This Score Was Built
9.6/10 = the four axes below, added up. Every input is printed on this page, so you can check the arithmetic.
1 of 1 actives carry their own numeric dose.
Per-ingredient evidence as rated in the table above: 1 strong.
$0.83 per serving against a category median of $1.33 across 19 products we list.
Names 3 specific risks or affected groups.
⛔ What this does not measure: whether the product works. We do not run assays and we do not dose people. The full method is on our About page →
Side Effects & Safety
Very safe. Rare: insomnia if taken late in day. Avoid if soy allergy (choose sunflower PS instead).
* Always consult a qualified healthcare provider before starting any supplement regimen, especially if you are pregnant, nursing, have a medical condition, or take prescription medications.
Who Should (and Shouldn't) Buy Phosphatidylserine?
✓ Good For
- •FDA-qualified health claim for cognitive decline
- •Multiple clinical trials in human subjects
- •Reduces cortisol — dual cognitive and stress benefits
- •NOW Foods is a highly trusted brand
✗ Not Ideal For
- •Works best over long term (months)
- •Soy-derived (some prefer sunflower-derived)
- •Not a stimulant — won't give quick focus boost
Price & Value for Money
At $0.83 per serving, Phosphatidylserine is very affordable in absolute terms. Against the memory brain health products we list, it scores 1.6 out of 2 on cost: $0.83 per serving against a category median of $1.33 across 19 products we list.
Phosphatidylserine vs. Competitors
| Metric | Phosphatidylserine(this) | Cognizin Citicoline | Bacopa Monnieri |
|---|---|---|---|
| Overall (computed) | 9.6/10★ | 8.8/10 | 8.9/10 |
| Dose transparency | 3/3 | 3/3 | 3/3 |
| Evidence | 3/3 | 3/3 | 3/3 |
| Cost rating | 1.6/2 | 1.8/2 | 1.9/2★ |
| Risk disclosure | 2/2★ | 1/2 | 1/2 |
| Monthly Cost | $24.99 | $19.99 | $12.99★ |
Our Final Verdict
Phosphatidylserine
NOW Foods Phosphatidylserine is one of the few supplements with an FDA-qualified health claim for cognitive decline. Essential for anyone over 40 concerned about long-term brain health.
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