Nootropics Depot vs Jarrow KSM-66 Ashwagandha (2026)
Informational comparison of label data and cost — not medical advice. Prices are live per-serving figures; formulas are each brand’s published Supplement Facts.
Nootropics Depot KSM-66 Ashwagandha (300mg, 90ct) and Jarrow Formulas Ashwagandha KSM-66 (300mg, 120ct) use the identical licensed KSM-66 extract at 300 mg — the same branded root extract used in most of the published ashwagandha trials. The differences are that Nootropics Depot hits the dose in one capsule and publishes third-party test results, while Jarrow needs two.
The numbers, side by side
| Nootropics Depot KSM-66 Ashwagandha (300mg, 90ct) | Jarrow Formulas Ashwagandha KSM-66 (300mg, 120ct) | |
|---|---|---|
| Form | KSM-66 root extract | KSM-66 root extract |
| Dose / serving | 300 mg | 300 mg |
| Serving size | 1 capsule | 2 capsules |
| Servings / container | 90 | 60 |
| Third-party cert | Third-Party Tested | None |
| Price | $22.99 | $22.93 |
| Cost / day | $0.25 | $0.38 |
| Buy | Check price → | Check price → |
Prices are live Amazon buy-box figures ÷ pack serving count, last reviewed September 8, 2026. Formula details are each brand’s published Supplement Facts panel.
The real difference
KSM-66 is a branded, standardised ashwagandha root extract, licensed by its manufacturer to supplement brands. When two products both say KSM-66 at 300 mg, they contain the same extract at the same dose. That is unusually clean — most herbal comparisons founder on unknown standardisation, and this one does not.
So the decision comes down to format and verification. Nootropics Depot delivers 300 mg in a single capsule and publishes batch third-party testing; Jarrow requires two capsules for the same 300 mg and carries no third-party certification. Neither is a different herb.
Who each one is for
Choose Nootropics Depot if you want the 300 mg dose in one capsule and published third-party testing on the batch.
Choose Jarrow if it is cheaper per bottle where you shop and you do not mind taking two capsules to reach the same 300 mg.
Worth knowing ashwagandha is not for everyone. It is generally avoided in pregnancy and with thyroid medication, and there are case reports of liver injury. Talk to a clinician if either applies.
Our picks
300 mg KSM-66 in a single capsule, third-party tested. $0.25/day.
The same 300 mg of KSM-66, split across two capsules. $0.38/day.
As an Amazon Associate we earn from qualifying purchases. We rank by verified label data and cost per day, never commissions.
The evidence · Ashwagandha
What the published reviews of Ashwagandha concluded
- Clinical evaluation of the pharmacological impact of ashwagandha root extract on sleep in healthy volunteers and insomnia patients: A double-blind, randomized, parallel-group, placebo-controlled study. · Journal of ethnopharmacology, 2021
“The present study confirms that Ashwagandha root extract can improve sleep quality and can help in managing insomnia. Ashwagandha root extract was well tolerated by all the participants irrespective of their health condition and age.”
- Safety of Ashwagandha Root Extract: A Randomized, Placebo-Controlled, study in Healthy Volunteers. · Complementary therapies in medicine, 2021
“Ashwagandha is being consumed since time immemorial following the Ayurvedic medicine practices. Modern science requires evidence of the safety and efficacy of the Ashwagandha extract before mass consumption for various health issues and as a supplement.”
- A double-blind, randomized, placebo-controlled trial on the effect of Ashwagandha (Withania somnifera dunal.) root extract in improving cardiorespiratory endurance and recovery in healthy athletic adults. · Journal of ethnopharmacology, 2021
“The present findings suggest that Ashwagandha root extract can successfully enhance cardiorespiratory endurance and improve the quality of life in healthy athletic adults. No adverse events were reported by any of the subjects in this study.”
- A randomized, double blind, placebo controlled study to evaluate the effects of ashwagandha (Withania somnifera) extract on sleep quality in healthy adults. · Sleep medicine, 2020
“Supplementation with the standardized ashwagandha extract for six weeks improved the overall quality of sleep by significantly improving the NRS condition in healthy subjects. No treatment related adverse events were reported in the study.”
Method: PubMed searched in humans for randomised trials with Ashwagandha in the title; these 4 of the 23 that qualified are shown with the authors’ own conclusion quoted rather than summarised. What it cannot tell you: whether Ashwagandha will work for you — each of these reports an average across trials published 2020–2021, and null findings are shown here as readily as positive ones.
Frequently asked questions
Is Nootropics Depot or Jarrow KSM-66 better?
They use the identical licensed KSM-66 root extract at the same 300 mg dose, so the active ingredient matches exactly. Nootropics Depot delivers it in one capsule with published third-party testing; Jarrow takes two capsules and carries no third-party certification.
What does KSM-66 actually mean?
KSM-66 is a branded, standardised ashwagandha root extract produced under licence and used in much of the published clinical work. When two products both state KSM-66 at the same milligram dose, the extract inside is the same, which is rarely true of unbranded herbal extracts.
Who should not take ashwagandha?
It is generally avoided in pregnancy, and it can interact with thyroid medication because it may raise thyroid hormone levels. There are also published case reports of liver injury. Anyone pregnant, on thyroid treatment, or with liver disease should check with a clinician first.
Related
- KSM-66 vs Sensoril — root vs leaf-and-root, and why the dose differs
- Ashwagandha guide — evidence, dose and cautions
- All ashwagandha products — ranked by cost per dose
Sources
- Product labels: manufacturer Supplement Facts panels for both products, plus live Amazon pricing.
- NIH National Center for Complementary and Integrative Health. “Ashwagandha.” nccih.nih.gov
- Product labels and live Amazon pricing for both products, reviewed August 2026.