What is phosphatidylserine (PS)?

Phosphatidylserine (PS) is a phospholipid naturally found in cell membranes and concentrated in brain tissue. It is also available as a dietary supplement.

What are the main benefits of phosphatidylserine?

PS is most studied for supporting cognitive function in older adults and for stress support. Evidence for exercise performance or recovery is limited and inconsistent.

What is a typical phosphatidylserine dosage?

Common supplemental amounts are about 100–300 mg per day. Dosing can vary by product and goal, so follow label directions or clinician guidance.

Does phosphatidylserine lower cortisol or stress?

Some research suggests PS may help reduce cortisol response and perceived stress in certain high-stress situations. Effects can vary between individuals.

Is phosphatidylserine safe and are there side effects?

PS is generally well tolerated for many people when used as directed. Possible side effects can include mild digestive upset or sleep changes, and it’s best to consult a clinician if pregnant, breastfeeding, or taking medications.

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Phosphatidylserine

Mixed study results·5/10

A higher score indicates better study conditions, but not necessarily effectiveness.

Phosphatidylserine (PS) is a phospholipid supplement studied for cognitive and stress-support benefits, mainly in older adults.

Exercise Recovery Cognitive Enhancement Stress Relief Memory Improvement Exercise Performance Neuroprotective

dose range

100–300 mg

Divided into 2–3 doses with meals

Consumption

Take with meals for better absorption and tolerance.

Fat-soluble: take with fat.

Best time

Morning and with main meals are commonly suggested.

Description

Phosphatidylserine (PS) is a naturally occurring phospholipid found in cell membranes, highly concentrated in brain tissue. Supplemental PS is widely used for supporting cognitive function and mitigating stress, especially in older populations.

benefits

Main effects with level of evidence

Mixed

Note on evidence

Evidence supports modest cognitive and stress benefits in older adults and stressed individuals, but results are inconsistent and less robust for athletic or other uses.

Cognitive Support

Moderate

PS supplementation may improve memory, processing speed, and cognitive function in older adults with mild cognitive decline.

Particularly relevant for: Older adults · Individuals with mild cognitive impairment

1 · WebMD 2 · Examine.com 3 · PMC Article

Stress Reduction

Moderate

PS may help lower cortisol and perceived stress in high-stress individuals or those exposed to acute stressors.

Particularly relevant for: Stressed individuals

2 · Examine.com 4 · Verywell Mind

Exercise Recovery (limited)

Limited

There is limited and inconsistent evidence that PS may improve exercise capacity or recovery and reduce muscle soreness in athletes.

Particularly relevant for: Athletes

2 · Examine.com 4 · Verywell Mind

Safety & Information

Important safety information & known risks

For educational purposes only • not medical advice

Phosphatidylserine is well-tolerated at typical supplemental doses; rare side effects may include GI discomfort.

warning notices

Mild side effects may include gas, upset stomach, or insomnia at higher doses.
Safety of long-term use beyond 6 months is not thoroughly studied.
Avoid use if allergic to soy, as most supplements are soy-derived.
Consult a healthcare professional before use if taking anticoagulants, anticholinergic, or cholinergic medications, due to possible interactions.
Avoid during pregnancy or breastfeeding unless supervised by a healthcare provider, as safety is unestablished.

Known interactions with medications

Cholinergic or anticholinergic drugs
Anticoagulants

Contraindications / special precautions

Soy allergy (for soy-derived forms)
Pregnancy/breastfeeding (insufficient data)

interactions

Important interactions between active ingredient ↔ supplement / medication / food

PS has few clinically significant interactions, but caution is warranted with some medications and in special populations.

May interact with anticholinergic drugs.

drug · Anticholinergic Medications

CautionLimited

Why

PS may theoretically enhance cholinergic activity, potentially opposing the effects of anticholinergic drugs.

recommendation

Monitor for reduced efficacy of anticholinergic medications.

2 · Examine.com

Possible interaction with blood thinners.

drug · Anticoagulants or antiplatelet drugs

CautionLimited

Why

Some sources suggest a potential (though unproven) for additive bleeding risk when combined with anticoagulants.

recommendation

Consult a healthcare professional before combining.

1 · WebMD 5 · Cleveland Clinic

mechanisms of action

Brief explanations of how it works

Membrane Fluidity and Cell Signaling

PS is a vital component of neuronal cell membranes, supporting fluidity and participating in signaling that underlies cognitive processes.

2 · Examine.com 3 · PMC Article

Cortisol Regulation

Supplemental PS may blunt stress-induced increases in cortisol, potentially supporting stress resilience.

2 · Examine.com 4 · Verywell Mind

Sources & References

Primary literature and reviews on which these statements are based

5 sources

Last updated: March 11, 2026

This information is for educational purposes only and does not replace medical advice.