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Nootropics Depot vs Jarrow KSM-66 Ashwagandha (2026)
Disclosure: We earn commissions on purchases made through our links. This never influences our scores. Editorial policy
The Verdict
These two are nearly tied - Nootropics Depot posts a 91 execution score to Jarrow's 90 on our 0-100 scale, and both land at about $0.38 per effective dose. The extract (KSM-66, 5% withanolides, 300mg) is identical. Nootropics Depot's small edge comes from its published in-house and third-party COAs; Jarrow is a well-established value brand. In our view this is a near coin-flip: Nootropics Depot for the extra testing documentation, Jarrow for its wider retail availability. Both are excellent KSM-66 products at the same price.
KSM-66 Ashwagandha Extract 300mg
Nootropics Depot
KSM-66 Ashwagandha 300mg
Jarrow Formulas
Head-to-Head Comparison
| Category | KSM-66 Ashwagandha Extract 300mg Nootropics Depot | KSM-66 Ashwagandha 300mg Jarrow Formulas |
|---|---|---|
| Brand Score | 91/100Winner | 90/100 |
| Dosing & Form | 25/25Winner | 25/25 |
| Purity | 22/25Winner | 19/25 |
| Value | 21/25 | 23/25Winner |
| Transparency | 23/25Winner | 23/25 |
| Cost/Day | $0.38Winner | $0.38 |
| Dose/Serving | 300mg | 300mg |
| Form | KSM-66 Root Extract (5% withanolides) | KSM-66 Root Extract (5% withanolides) |
| Third-Party Tested | ✓ Yes | No |
| Proprietary Blend | No | No |
Why This Comparison Matters
This is a like-for-like KSM-66 matchup: both Nootropics Depot and Jarrow Formulas use the exact same branded extract - KSM-66 root, standardized to 5% withanolides at 300mg - so the active ingredient and dose are identical. That makes it a clean test of testing rigor, price, and transparency rather than formulation.
KSM-66 is the most-studied branded ashwagandha extract, with published data on stress, cortisol, and sleep. When two products use the same extract at the same dose, the research applies equally; the differences are about the brand behind the bottle.
We scored both on evidence, quality, cost per effective dose, and transparency.
Detailed Score Breakdown
KSM-66 Ashwagandha Extract 300mg
Nootropics Depot
KSM-66 is the most clinically studied ashwagandha extract with 24+ published clinical trials
Uses genuine KSM-66 with certificate of analysis available, third-party tested in-house and externally
$0.38/day at 600mg (2 capsules) - still strong value for genuine KSM-66 after a 2026 price rise
Full ingredient disclosure, KSM-66 certification, withanolide content specified on label
Nootropics Depot is known in the supplement community for rigorous quality testing and genuine ingredient sourcing
KSM-66 Ashwagandha 300mg
Jarrow Formulas
KSM-66 extract with the full clinical evidence base behind it
GMP facility, uses licensed KSM-66, no independent sport certification
$0.30/day at 600mg (2 capsules) - strong value for a branded KSM-66 product
Full disclosure of extract type, withanolide standardization, no proprietary blends
Well-established supplement brand with a straightforward KSM-66 product at a competitive price
How We Compared These Products
Every product in our database is scored on four equally-weighted pillars: dosing accuracy and form quality, purity verification (third-party testing), cost per clinically effective dose (not cost per pill), and label transparency. Each pillar is worth 25 points for a total of 100.
Cost per effective dose is calculated using the clinically studied dose from published research, not the manufacturer's suggested serving. If a product requires multiple servings to reach the dose used in clinical trials, that cost is reflected in the value score.
For a full explanation of our scoring methodology, see our methodology page. Prices were last checked on the dates listed for each product and may have changed.
Frequently Asked Questions
Is Nootropics Depot or Jarrow KSM-66 ashwagandha better?
They are nearly identical: both use the same KSM-66 extract (5% withanolides, 300mg) at about $0.38 per dose, and they score 91 vs 90 on our 0-100 execution scale. Since the extract and dose are the same, the research applies equally. Nootropics Depot's slight edge is its published in-house and third-party certificates of analysis; Jarrow's edge is broad availability. Either is a strong choice.
Since both use KSM-66, is there any real difference?
Very little on the active ingredient - KSM-66 is a single branded, standardized extract, so both deliver the same withanolide content at the same 300mg dose. The differences are around it: testing transparency, capsule count per bottle, and price. When two products share the same branded extract at the same dose, you can buy on price and testing documentation with confidence that the ashwagandha itself is equivalent.
More Ashwagandha Comparisons
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FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.