Adaptogen · Mental Wellness
Ashwagandha KSM-66
The most clinically studied adaptogen in the world. Backed by 22+ human clinical trials. Reduces cortisol, improves sleep quality, and boosts resilience.
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AMZ
Amazon
Jarrow KSM-66 300mg 120 caps · Subscribe & Save
$27.99$19.99Save 29%
Buy Now →iHerb
iHerb
NOW Ashwagandha 450mg · 90 caps · Free ship $40+
$22.99$17.99Save $5
View Deal →MYP
Myprotein
Ashwagandha Extract 90 caps · US Stock
$24.99$18.99Save $6
View Deal →ORG
Organifi Gold
Ashwagandha superfood blend · Powder form
$79.95$69.95Premium blend
View Deal →Reduces Cortisol
Lowers stress hormone by up to 28% in 60 days
Better Sleep
Improves sleep quality and reduces time to fall asleep
Muscle & Recovery
Increases testosterone and reduces exercise damage
Cognitive Boost
Improves memory, focus and reaction time
The Science
What Research Says
28%
Cortisol Reduction
300mg KSM-66 daily for 60 days reduced serum cortisol by 27.9% vs placebo.
Indian J. of Psychological Medicine
22+
Human Clinical Trials
KSM-66 is the most clinically studied ashwagandha extract available.
KSM-66 Research Database
+17%
Testosterone Increase
Men taking 300mg KSM-66 daily for 8 weeks showed significant improvements.
Evidence-Based Complementary Medicine
72%
Sleep Quality Improvement
Participants reported 72% better sleep quality after 8 weeks.
PLOS ONE, 2020
Product Details
Full Specifications
| Best form | KSM-66® or Sensoril® extract (5% withanolides) |
| Dose per serving | 300–600mg extract daily |
| When to take | Evening with food (maximizes sleep effects) |
| Cycle | 8–12 weeks on, 4 weeks off |
| Form | Capsules (most convenient) or powder |
| Withanolides | Minimum 5% for clinical effect |
| Suitable for | Adults 18+, men and women equally |
| Results timeline | 2–4 weeks sleep, 6–8 weeks stress/strength |
FAQ
Frequently Asked Questions
KSM-66 vs Sensoril — what’s the difference?
KSM-66 is root only — best for energy, strength, testosterone. Sensoril uses root + leaves — better for stress and sleep. Both are excellent. Choose based on your main goal.
Can I take ashwagandha every day?
Yes, for up to 12 weeks. Most practitioners recommend cycling — 8–12 weeks on, 4 weeks off.
Does ashwagandha make you sleepy?
It improves sleep quality without causing daytime drowsiness. Taking it in the evening maximizes sleep benefits.
Amazon vs iHerb for ashwagandha?
Amazon has the widest selection and best prices with Subscribe & Save. iHerb carries niche brands not on Amazon and ships internationally.
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