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#27 in Herbal Supplements Third-Party Tested

Nutricost KSM-66 Ashwagandha 600mg

by Nutricost

"Full-spectrum KSM-66 ashwagandha root extract — 600mg per capsule for stress, testosterone, and cortisol reduction"

Amazon Rating
4.5/5
Reviews
20,000+
Price Range
$18-24
Servings
120 capsules
GMP CertifiedThird-Party TestedNon-GMO
Our Editorial Rating
8.6
Very Good
FormCapsule
SubcategoryAshwagandha (KSM-66 High-Dose)
View on Amazon

Overview

Nutricost KSM-66 Ashwagandha provides 600mg of KSM-66 full-spectrum ashwagandha root extract per capsule with 120 capsules per bottle. KSM-66 is the most clinically studied ashwagandha extract with 24+ gold-standard clinical trials demonstrating cortisol reduction (30%), testosterone increase (17% in men), anxiety reduction, improved sleep quality, and enhanced athletic performance. The 600mg dose matches the clinical trial dosing used in the landmark studies.

Key Ingredients

IngredientAmount
KSM-66 Ashwagandha Root Extract600 mg

Pros & Cons

What We Like

  • 600mg clinical dose
  • KSM-66 (most studied extract)
  • 120 capsules (4-month supply)
  • Under $24 (exceptional value)
  • 20,000+ reviews

What Could Be Better

  • May cause drowsiness
  • Thyroid interaction risk
  • Effects take 2-4 weeks
  • Nightshade family (avoid if sensitive)

Who Is This For?

Best For

  • Stress and cortisol reduction
  • Men's testosterone support
  • Anxiety management
  • Athletic performance

Not Ideal For

  • Those with thyroid conditions
  • Nightshade-sensitive individuals
  • Pregnant/nursing women

Our Verdict

8.6/10 — Very Good

Nutricost KSM-66 Ashwagandha is the value king of ashwagandha — 120 capsules of the most clinically studied extract at clinical dose for under $24. The best bang-for-buck adaptogen available.

Alternatives to Consider

No direct alternatives listed for this product yet.