Comparison
Phosphatidylserine (PS) vs Ashwagandha
Phosphatidylserine (PS)
Phospholipid concentrated in brain cell membranes. Supports membrane fluidity and stress response.
Ashwagandha
Withania somnifera, the most clinically validated herbal adaptogen for stress and anxiety. Reduces serum cortisol by roughly 28% at 600 mg/day over 8 weeks. Modest evidence for sleep quality and testosterone in men. Choose the KSM-66 extract for the best-studied form.
| Field | Phosphatidylserine (PS) | Ashwagandha |
|---|---|---|
| Category | cholinergic | adaptogen |
| Dose range | 100–300mg | 300–600mg |
| Half-life | 12h | 6h |
| Onset | — | — |
| Evidence | EVIDENCEB | EVIDENCEA |
| Safety | ●●●●● | ●●●●● |
| Legal (US) | USOTC | USOTC |
| PubMed refs | 280 | 650 |
The comparison in plain English
Auto-generated from dataPhosphatidylserine (PS) and Ashwagandha are both in the cholinergic (cholinergic) and adaptogen respectively. Phosphatidylserine (PS) Phospholipid concentrated in brain cell membranes. Ashwagandha Withania somnifera, the most clinically validated herbal adaptogen for stress and anxiety.
Bottom line
Phosphatidylserine (PS) (evidence B, safety 5/5) has a stronger evidence base than Ashwagandha (evidence A, safety 5/5). Phosphatidylserine (PS) has the slightly cleaner safety profile. For users new to either, the higher-evidence option is the safer first try.
Choose Phosphatidylserine (PS) if
Phosphatidylserine (PS) is the better fit when your goal aligns with its mechanism (A structural phospholipid that comprises 10-20% of neuronal cell membranes, particularly concentrated in the inner leaflet where it supports receptor function and membrane fluidity) and the dose range (100–300mg) suits your protocol. Half-life is 12h.
Choose Ashwagandha if
Ashwagandha is the better fit when your goal aligns with its mechanism (Withanolides modulate GABA-A receptors and blunt the HPA-axis cortisol response) and the dose range (300–600mg) suits your protocol. Half-life is 6h.