Phospho2 (Phosphatidylserine)

Phosphatidylserine is a phospholipid that maintains neuronal membrane fluidity and supports neurotransmitter function. It enhances cognitive performance by facilitating cellular communication in brain tissue and modulating cortisol responses to stress.

Origin & History

Phosphatidylserine (PS) is a naturally occurring phospholipid composed of a glycerol backbone with two fatty acids and a phosphate-linked serine head group. Modern commercial PS is primarily derived from soy lecithin through enzymatic processes or solvent extraction, replacing earlier bovine cortex sources due to BSE safety concerns. Standardized soy-derived extracts typically contain 50-100% PS content.

Historical & Cultural Context

No evidence of traditional medicinal use was found in the research. PS research and supplementation represents a modern nutritional approach to cognitive support, emerging from scientific understanding of phospholipid biology rather than historical herbal medicine systems.

Health Benefits

• Improves ADHD symptoms in children - RCT (n=36) showed significant improvement in symptoms, short-term auditory memory, and inattention/impulsivity with 200mg/day (Strong evidence, PMID: 23495677)
• Enhances memory in elderly with complaints - Multiple RCTs demonstrate improved delayed recall and recognition memory with 300mg/day soy-PS (Strong evidence, PMID: 11842880)
• Supports cognitive function in mild cognitive impairment - RCT (n=190) showed improved short-term memory and arithmetic performance over 12 months (Strong evidence, PMID: 39317299)
• Modulates stress response during exercise - 800mg/day BC-PS reduced cortisol response in untrained adults (Moderate evidence, PMID: 16869708)
• Enhances memory when combined with omega-3s - RCT (n=157) showed PS-DHA improved verbal learning test scores in non-demented elderly (Strong evidence, PMID: 20523044)

How It Works

Phosphatidylserine integrates into neuronal membranes where it maintains membrane fluidity and supports acetylcholine synthesis. It modulates protein kinase C activity and enhances glucose metabolism in brain cells. The compound also regulates the hypothalamic-pituitary-adrenal axis by blunting cortisol release during stress responses.

Scientific Research

Multiple double-blind, placebo-controlled RCTs support PS efficacy, including a pediatric ADHD trial (n=36, PMID: 23495677) showing significant symptom improvement with 200mg/day, and elderly memory studies (n=120, PMID: 11842880; n=190, PMID: 39317299) demonstrating enhanced recall with 300mg/day. A 15-week trial (n=157, PMID: 20523044) found PS-DHA combination improved cognitive batteries in non-demented elderly with memory complaints.

Clinical Summary

Randomized controlled trials show phosphatidylserine improves ADHD symptoms in children at 200mg daily (n=36 study). Multiple RCTs in elderly adults demonstrate enhanced delayed recall and memory performance with 100-300mg doses. Evidence is strongest for cognitive benefits in both pediatric ADHD populations and age-related memory decline. Most studies range from 6-12 weeks duration with consistent positive outcomes.

Nutritional Profile

Phosphatidylserine (PS) is a phospholipid compound, not a traditional macronutrient or micronutrient source. As a purified supplement (Phospho2/Sharp-PS), it provides negligible caloric value at typical doses. Key compositional data: Active compound: Phosphatidylserine at standardized concentrations of 20-50mg per softgel/capsule (typical commercial preparations), with therapeutic doses of 100-300mg/day used in clinical trials. Molecular structure consists of a glycerol backbone, two fatty acid chains (in soy-derived PS: predominantly polyunsaturated fatty acids including linoleic acid ~38% and oleic acid ~20%), and a serine head group linked via phosphodiester bond. Soy-derived PS (most common supplement form, as bovine-derived PS was discontinued due to BSE concerns) contains predominantly vegetable-origin fatty acid chains, differing from brain PS which is enriched with docosahexaenoic acid (DHA, 22:6n-3) and stearic acid. Phosphorus content: approximately 4% by molecular weight (~40mg phosphorus per 1g PS). Serine content: L-serine constitutes approximately 8-9% of molecular weight. Bioavailability: PS is well-absorbed orally, with peak plasma levels occurring 1-3 hours post-ingestion; absorption is enhanced when taken with food containing dietary fats. Lymphatic transport is the primary absorption route. No significant vitamin, mineral, or fiber content at therapeutic doses. Caloric contribution is minimal (<5 kcal per 100mg dose).

Preparation & Dosage

Clinically studied doses range from 100-800mg/day orally, often divided. For ADHD in children: 200mg/day; for elderly memory support: 300mg/day; for exercise stress response: 800mg/day. Commercial supplements typically recommend 100-500mg/day of soy-derived PS standardized to 50-100% purity. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

DHA, EPA, Acetyl-L-Carnitine, Ginkgo Biloba, B-Complex Vitamins

Safety & Interactions

Phosphatidylserine is generally well-tolerated with mild side effects including insomnia and stomach upset at higher doses. It may enhance the effects of anticoagulant medications due to potential blood-thinning properties. No significant drug interactions have been documented in clinical studies. Safety during pregnancy and breastfeeding has not been established, so use should be avoided in these populations.