Phosphatidylserine (PS)
Also known as PS, PtdSer
Phosphatidylserine is a phospholipid that makes up part of every cell membrane and is especially concentrated in the brain, where it supports neuronal signaling. Supplements (now mostly plant-derived from sunflower or soy) are studied for age-related memory decline and for blunting the cortisol response to exercise and stress. Evidence is moderate for cognition in older adults and preliminary for stress and athletic recovery.
Benefits
May support memory in older adults
ModerateSeveral trials report modest improvements in memory and cognitive function in older adults with age-related decline.
May blunt the cortisol stress response
PreliminaryPS has reduced cortisol spikes from intense exercise and acute stress in small studies, supporting recovery and calm.
May aid focus and attention
PreliminarySome research, including in children and adults, suggests benefits for attention, though trials are small and mixed.
Pros & cons
Pros
- Good safety profile
- Moderate evidence for age-related memory
- May reduce exercise- and stress-induced cortisol
- Plant-derived (sunflower) forms avoid soy allergens
Cons
- Benefits in healthy young adults are limited
- Effective doses can be expensive
- Older studies used animal-derived PS that differs from modern forms
Side effects
Mild digestive upset
Occasional stomach discomfort or nausea, usually at higher doses.
Insomnia at high doses
Large doses taken late in the day may interfere with sleep in some people.
How to take it
Typical dose
100 mg three times daily (300 mg/day) for cognition
Timing
With meals; athletes often dose around training
Common forms
Tip: Most cognitive trials use 300 mg/day, often split into three doses. Doses up to 400 mg/day have been used for stress and exercise recovery.
What the research says
Phosphatidylserine and memory in older adults
ModerateTrials and reviews report modest improvements in memory and cognition in older adults with age-related decline.
Phosphatidylserine and exercise cortisol
PreliminarySmall studies found PS supplementation blunted the cortisol response to intense exercise and acute stress.
How Phosphatidylserine (PS) interacts
Synergies, absorption effects, and cautions between Phosphatidylserine (PS) and other supplements in the matrix.
Both are key brain-membrane components; DHA and phosphatidylserine support neuronal membranes and cognition together.
Compare the pairingBoth support neuronal membrane synthesis through complementary phospholipid and cholinergic pathways.
Compare the pairingBoth supply phospholipid and choline building blocks that support membranes and cholinergic signaling for cognition.
Compare the pairingBoth can blunt the cortisol stress response, a common pairing for stress resilience and recovery.
Compare the pairingFrequently asked questions
What is Phosphatidylserine (PS) used for?
Phosphatidylserine (PS) is most commonly used for brain health, focus, and stress. Several trials report modest improvements in memory and cognitive function in older adults with age-related decline.
How much Phosphatidylserine (PS) should I take?
A typical dose is 100 mg three times daily (300 mg/day) for cognition. Most cognitive trials use 300 mg/day, often split into three doses. Doses up to 400 mg/day have been used for stress and exercise recovery. Start at the lower end and confirm the right dose for you with a healthcare professional.
When is the best time to take Phosphatidylserine (PS)?
Recommended timing: With meals; athletes often dose around training.
What are the side effects of Phosphatidylserine (PS)?
Reported side effects include mild digestive upset and insomnia at high doses. Occasional stomach discomfort or nausea, usually at higher doses.
Who should be careful with Phosphatidylserine (PS)?
May interact with blood thinners and acetylcholinesterase inhibitors; check with your doctor. Speak with a healthcare professional if any of these apply to you.
Important cautions
- May interact with blood thinners and acetylcholinesterase inhibitors; check with your doctor.
- Choose a sunflower-derived form if you have a soy allergy.
- Not well studied in pregnancy.
More Nootropics
Alpha-GPC
A highly bioavailable choline source for memory and power output.
Caffeine
The world's most popular cognitive stimulant.
Citicoline
A choline source studied for focus, memory, and brain health.
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