Comparison
Ashwagandha vs Muira Puama
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.
Muira Puama
Amazonian root (Ptychopetalum olacoides) traditionally used for libido and cognitive support. Limited Western evidence.
| Field | Ashwagandha | Muira Puama |
|---|---|---|
| Category | adaptogen | adaptogen |
| Dose range | 300–600mg | 1000–1500mg |
| Half-life | 6h | — |
| Onset | — | — |
| Evidence | EVIDENCEA | EVIDENCEC |
| Safety | ●●●●● | ●●●●○ |
| Legal (US) | USOTC | USOTC |
| PubMed refs | 650 | 80 |
The comparison in plain English
Auto-generated from dataAshwagandha and Muira Puama are both in the adaptogen category respectively. Ashwagandha Withania somnifera, the most clinically validated herbal adaptogen for stress and anxiety. Muira Puama Amazonian root (Ptychopetalum olacoides) traditionally used for libido and cognitive support.
Bottom line
Ashwagandha (evidence A, safety 5/5) has a weaker evidence base than Muira Puama (evidence C, safety 4/5). Ashwagandha has the slightly cleaner safety profile. For users new to either, the higher-evidence option is the safer first try.
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.
Choose Muira Puama if
Muira Puama is the better fit when your goal aligns with its mechanism (Multiple bioactive compounds including alkaloids, lupeol, beta-sitosterol) and the dose range (1000–1500mg) suits your protocol. Half-life is —h.