Does phosphatidylserine improve memory?

The supplied evidence does not show a consistent overall benefit. Two randomized soy PS trials found no overall advantage, although one reported a lower-baseline subgroup signal (PMID:11842880; PMID:21103034).

What phosphatidylserine doses were studied?

Trials examined 100, 300, and 600 mg/day across 12 weeks to six months. These are research details, not personal dosing recommendations (PMID:11842880; PMID:21103034; PMID:23723695).

Is phosphatidylserine proven for ADHD?

No. A small pediatric trial tested differing PS and DHA formulations, and the higher-dose combination finding cannot be attributed to PS alone or generalized to adults (PMID:42345137).

Are all phosphatidylserine products equivalent?

No. Research involved soy PS, PS/DHA combinations, and a multi-ingredient formula, so results cannot be transferred automatically between products (PMID:39317299; PMID:42345137).

Supplement guide Nootropics

Phosphatidylserine

Human research on phosphatidylserine, largely soy-derived, is mixed and limited. Larger placebo-controlled trials in older adults with memory complaints found no overall cognitive advantage, while some subgroup and preliminary findings require cautious interpretation (PMID:11842880, PMID:21103034, PMID:23723695).

At a glance

Snapshot

Primary goal: Review research context rather than expect established cognitive effects.
Dosage range: Research evaluated soy PS at 100, 300, or 600 mg/day; these are study doses, not personal instructions (PMID:11842880, PMID:21103034, PMID:23723695).
Best time to take: Not established
Time to effect: Not established
Common stacks: Evidence includes PS combined with DHA or with alpha-linolenic acid, ginkgo flavonoids, and B vitamins, but these combinations cannot establish effects of PS alone (PMID:39317299, PMID:42345137).
Intake notes: Do not extrapolate findings across soy PS, PS/DHA products, and multi-ingredient formulas. Seek clinician review for pregnancy, breastfeeding, medical conditions, surgery, or medicines.

Use and selection

Buying Guide

Everything you need to know to make an informed decision about Phosphatidylserine

Why It Matters

The research used soy PS and non-equivalent combination formulas, so product composition affects how closely a product matches the evidence (PMID:11842880, PMID:21103034, PMID:39317299, PMID:42345137).

How Phosphatidylserine Helps You

Overall cognitive outcomes

Larger placebo-controlled soy PS trials did not show a significant overall cognitive advantage in adults with memory complaints (PMID:11842880, PMID:21103034).

Lower-baseline subgroup signal

One six-month trial reported favorable findings only among participants with lower baseline scores, while overall scores improved similarly in all groups (PMID:21103034).

Preliminary within-group findings

An uncontrolled pilot observed within-group cognitive improvements, but without placebo control these findings cannot establish a PS effect (PMID:23723695).

Formulation-dependent pediatric finding

In a small pediatric PS/DHA study, the higher-PS-plus-DHA arm performed best, but the result cannot be transferred to PS alone or adults (PMID:42345137).

Frequently Asked Questions

Common questions about Phosphatidylserine answered by our experts

Does phosphatidylserine improve memory?: The supplied evidence does not show a consistent overall benefit. Two randomized soy PS trials found no overall advantage, although one reported a lower-baseline subgroup signal (PMID:11842880; PMID:21103034).
What phosphatidylserine doses were studied?: Trials examined 100, 300, and 600 mg/day across 12 weeks to six months. These are research details, not personal dosing recommendations (PMID:11842880; PMID:21103034; PMID:23723695).
Is phosphatidylserine proven for ADHD?: No. A small pediatric trial tested differing PS and DHA formulations, and the higher-dose combination finding cannot be attributed to PS alone or generalized to adults (PMID:42345137).
Are all phosphatidylserine products equivalent?: No. Research involved soy PS, PS/DHA combinations, and a multi-ingredient formula, so results cannot be transferred automatically between products (PMID:39317299; PMID:42345137).