Phosphatidylserine

Overview

Phosphatidylserine (PS) is a phospholipid that constitutes 15% of the brain's total phospholipid pool. It plays essential roles in cell membrane fluidity, neurotransmitter release, and receptor function. PS levels decline with age, correlating with cognitive decline.

Key Benefits

• Memory & Cognition: Improves memory, attention, and processing speed in elderly
• Cortisol Reduction: Blunts cortisol response to physical and mental stress
• ADHD Support: Improves attention and impulse control in children with ADHD
• Athletic Recovery: Reduces exercise-induced cortisol and perceived soreness
• FDA Health Claim: Qualified claim for reducing risk of cognitive dysfunction

The FDA Qualification

PS is one of very few supplements with an FDA-qualified health claim: "Phosphatidylserine may reduce the risk of dementia in the elderly" and "may reduce the risk of cognitive dysfunction in the elderly." This reflects the strength of clinical evidence.

Soy vs Sunflower-Derived

Original research used bovine brain-derived PS (no longer available due to BSE concerns). Modern PS comes from soy or sunflower lecithin. Sunflower-derived is preferred for those avoiding soy and has comparable efficacy.

Mechanism of Action

PS is a key structural component of neuronal membranes, concentrated in the inner leaflet. It facilitates neurotransmitter release (acetylcholine, dopamine, serotonin) by modulating vesicle fusion. It activates PKC signaling for memory consolidation and regulates HPA axis cortisol output.

Research Status

Multiple RCTs. FDA-qualified health claim for cognitive decline. Well-established clinical evidence base. Decades of safe use.

Safety Profile

Excellent safety. FDA GRAS. Rare: GI discomfort, insomnia at high doses. May interact with blood thinners and anticholinergic medications. Safe for long-term use.

Related Compounds