For stress relief and cortisol management, this delivers 600mg of **KSM-66 Ashwagandha** per capsule — hitting the top of the 300–600mg clinical range used in research. KSM-66 is the most studied branded ashwagandha extract, standardized to a minimum 5% withanolides, and multiple RCTs show it can reduce your perceived stress and lower cortisol levels within 8 weeks.
The formula includes 5mg of **BioPerine** (black pepper extract) to support absorption. The single-capsule serving keeps things simple, and the 60-capsule count gives you a full two-month supply at one per day.
One thing to keep in mind: ashwagandha may interact with thyroid medications and is not recommended during pregnancy. If you're taking it for sleep support, some studies used doses split between morning and evening, so a single 600mg dose may work differently than two 300mg doses spread throughout your day.
Nutricost
KSM-66, Ashwagandha Root Extract, 60 Capsules
Capsule · 60 servings · $0.25/serving
Supports
Score Breakdown
Ingredients (2)
Optimal dose · Premium form
Within effective range
Label Nutrition Facts
Active Ingredients
From the label · % Daily Value
Organic KSM-66 Ashwagandha Extract600 mg
BioPerine Black Pepper Extract5 mg
Other Ingredients
Fillers, coatings, and additives
Magnesium StearateLubricant
Silicon DioxideAnti-caking
HypromelloseCapsule
Organic flow agent blend (organic oat fiber, organic pea starch, organic bamboo extract, organic gum arabic, organic sunflower oil, organic sunflower lecithin)
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.