Source: Examine.com — Phosphatidylserine — 100 mg 3×/day (~300 mg) for cognition; 100 mg is a single serving.
100 mg per dose; cognition studies use 300 mg/day (100 mg ×3).
A phospholipid that makes up part of every cell membrane, concentrated in the brain.
Maintains membrane fluidity and cell signaling in neurons.
Safe. Occasional mild GI upset or insomnia. Cognition studies use 300 mg/day (100 mg three times).
| Per serving | |
|---|---|
| Typical branded single-ingredient product | $0.75 |
| Bulk powder at the clinical dose (100g 20%, $26.97) | $0.13 |
Buying bulk powder instead of a branded bottle saves about 82% per serving.
Bulk price: $26.97/100g → Alt source: $24.99/50gEducational only — not medical advice. Grades and clinical doses are computed from public labels against sourced research (citations on the main site); prices last verified 2026-07-21. Expensive Powder has no sponsors; bulk links may earn an affiliate commission, which never affects a grade. Talk to a clinician before starting any supplement.