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ashwagandha
Sports Research Organic Ashwagandha KSM-66Review 2026
Sports Research Organic Ashwagandha uses 600mg KSM-66 (5% withanolides HPLC standardized) at the top of the clinical range, USDA Organic certified, single-ingredient formulation. We score it 89/100. CPED $0.30/day. Strong BUY runner-up to NSF Certified for Sport alternatives.
EDE Score
Verdict
Cost per effective day
$0.30 / effective day/ day
Why this verdict
- KSM-66 patented standardized extract
- 600 mg = single-cap clinical dose
- USDA Organic certified
Verdict: BUY. EDE Score 89/100. Sports Research Organic Ashwagandha is a clinical-grade single-ingredient adaptogen built around the KSM-66 patented extract at the full 600 mg clinical dose. The KSM-66 standardization to 5 percent withanolides via HPLC is the gold-standard ashwagandha specification, used in the majority of human RCTs reporting cortisol reduction and testosterone improvement. The product is USDA Organic certified, single-ingredient (no Tribulus bundling, no proprietary blend), in a vegan organic pullulan capsule, at one of the lowest CPEDs in the category at $0.30 per effective day. The 5-point gap to TOP PICK status comes from one criterion: third-party testing rigor. Sports Research is third-party tested but does not carry the NSF Certified for Sport seal that Momentous Ashwagandha carries. Strong BUY for non-athletes, brand-loyal Sports Research users, and anyone seeking organic certification.
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At a glance
| Metric | Value |
|---|---|
| Brand | Sports Research |
| Product | Organic Ashwagandha (Made with Organic KSM-66) |
| Form | Vegan veggie capsule (organic pullulan) |
| Servings per bottle | 90 |
| Serving size | 1 capsule daily |
| Active ingredient | Organic Ashwagandha root extract (KSM-66) 600 mg |
| Withanolide standardization | 5 percent withanolides minimum (HPLC verified, KSM-66 patented) |
| Price (brand direct, typical) | $27.00 |
| CPED | $0.30 per effective day |
| Best-in-class CPED for KSM-66 ashwagandha | $0.25 to $0.50 (Sports Research, Nutricost, Double Wood KSM-66) |
| Third-party certification | Third-party tested, USDA Organic, Non-GMO Project Verified (NOT NSF Certified for Sport) |
| EDE Score | 89/100 |
| Verdict | BUY |
Why this product matters for men 40+
Ashwagandha (Withania somnifera) is the most-studied adaptogenic herb in men's health for cortisol regulation, stress resilience, and modest testosterone support in stressed or sub-optimal hormonal status. A 2019 randomized double-blind placebo-controlled trial by Lopresti and colleagues in American Journal of Men's Health found that 8 weeks of ashwagandha supplementation at 600 mg/day in aging overweight men was associated with a 15 percent increase in salivary testosterone and an 18 percent increase in DHEA-S compared with placebo1. A 2013 trial by Ambiye and colleagues in Evidence-Based Complementary and Alternative Medicine found that 675 mg/day of standardized ashwagandha root extract in oligospermic men significantly improved sperm concentration, motility, and serum testosterone2. A 2015 trial by Wankhede and colleagues in Journal of the International Society of Sports Nutrition found that 8 weeks of 600 mg/day KSM-66 in men starting strength training significantly improved muscle strength, recovery, and testosterone vs placebo3.
The clinical evidence converges on three specifications: standardized extract (KSM-66 or Shoden), 300 to 600 mg/day dose, and root-only sourcing (not leaves). Sports Research Organic Ashwagandha hits all three at one capsule daily. Where the product loses points is on third-party certification rigor: Momentous Ashwagandha is NSF Certified for Sport, Sports Research is not.
For men 40+ specifically, the product targets three measurable outcomes: cortisol normalization (especially if morning cortisol is elevated on bloodwork), modest testosterone support (especially if baseline T is in lower-normal range under chronic stress), and sleep quality improvement (most users report subjective sleep improvement within 2 to 4 weeks).
Editorial commentary
What we are paying attention to with this product: Sports Research has positioned itself as a budget-to-mid-tier DTC brand with disciplined formulation choices. The Organic KSM-66 SKU is a different product from the Sports Research Ashwagandha SKU (which uses Shoden, a separate branded extract at 35 percent withanolide concentration). The KSM-66 version is the one that matches the majority of the published RCT literature; the Shoden version uses a different branded extract with less independent trial data.
The 600 mg dose per single capsule is exactly the dose used in the Lopresti 2019 trial1, the Wankhede 2015 trial3, and the majority of KSM-66 clinical studies on men's hormonal and stress endpoints. This is dose efficacy at its cleanest: one capsule daily delivers the studied dose, no math, no multi-cap dosing.
The USDA Organic certification is meaningful. KSM-66 is grown by Ixoreal Biomed in India under organic farming protocols, and the Sports Research product carries the USDA Organic seal end-to-end. For ashwagandha specifically, organic sourcing matters because the root absorbs heavy metals from soil more aggressively than many other herbs, and conventional Indian agriculture has historically had heavy metals contamination issues. USDA Organic is not the same as NSF Certified for Sport (different test scopes), but it is a meaningful purity signal.
Where it loses points relative to the TOP PICK in this category: NSF Certified for Sport. Momentous Ashwagandha (different brand, NooGandha extract, not KSM-66) is NSF Certified for Sport. Sports Research is not. For non-athlete buyers this difference is academic; for WADA-tested athletes it is a hard requirement.
Second consideration: the absence of a publicly accessible certificate of analysis. Sports Research states third-party testing for purity but does not publish per-batch COAs on the product page. You are trusting the brand statement rather than verifying the claim batch-by-batch.
The price is genuinely competitive. At $27 per 90-serving bottle, CPED is $0.30 per effective day, sitting in the cheapest tier for KSM-66 ashwagandha. Comparable products (Nutricost KSM-66, Double Wood KSM-66) cluster in the same $0.25 to $0.40 range. The premium-tier alternatives (Momentous, Pure Encapsulations) run $0.50 to $1.20 per effective day for similar or different extracts.
What is actually in it
| Ingredient | Form | Dose per serving | Clinical effective dose | % of effective dose | Evidence level |
|---|---|---|---|---|---|
| Ashwagandha | Organic root extract (KSM-66) | 600 mg | 300-600 mg/day standardized | 100% (top of range) | Strong |
Other ingredients: Veggie capsule (organic pullulan), organic rice hulls.
That is the entire ingredient list. No proprietary blend, no bundled "complex" with Tribulus or other herbs, no flavor masking. USDA Organic certified, Non-GMO Project Verified, vegan-compatible (organic pullulan capsule, no gelatin), gluten-free per the manufacturer.
The 600 mg dose is the elemental KSM-66 extract figure (correct labeling). One capsule daily delivers the clinical dose used in most published RCTs. KSM-66 is standardized to a minimum of 5 percent withanolides via HPLC (high performance liquid chromatography) on every batch by Ixoreal Biomed (the patent holder); Sports Research sources the extract from this single supplier.
EDE Score breakdown
| Criterion | Weight | Score (0-100) | Weighted | Notes |
|---|---|---|---|---|
| Dose Efficacy | 30% | 95 | 28.5 | 600 mg KSM-66 per capsule = top of 300-600 mg clinical range; matches Lopresti 2019 + Wankhede 2015 trial doses |
| Bioavailability | 20% | 90 | 18.0 | KSM-66 patented green-chemistry extraction, 5% withanolides HPLC standardized, root-only (not leaves) |
| Third-Party Testing | 15% | 75 | 11.25 | Third-party tested + USDA Organic + Non-GMO Project Verified, but NOT NSF Certified for Sport |
| Label Transparency | 15% | 100 | 15.0 | Single ingredient, full disclosure, no proprietary blend, no Tribulus bundling |
| Manufacturer Reputation | 10% | 88 | 8.8 | Sports Research = trusted DTC brand since 1980, family-owned, USDA Organic end-to-end |
| Community Sentiment | 5% | 50 | 2.5 | Default in Phase 1, enriched Q3 2026 |
| Price Per Effective Dose | 5% | 95 | 4.75 | $0.30/day = top tier (sub-$0.50) |
| EDE Score | 100% | 89 / 100 | BUY |
See our methodology for the full formula, weights, and tier definitions.
What we like
- Single 600 mg capsule = clinical dose. No multi-cap math, no ambiguity. The dose used in Lopresti 2019, Wankhede 2015, and the majority of KSM-66 RCTs is delivered in one capsule daily.
- KSM-66 is the gold-standard ashwagandha extract. Over 24 published human studies use KSM-66 specifically, with batch-by-batch standardization to 5 percent withanolides via HPLC by the patent holder Ixoreal Biomed. This is the closest the ashwagandha category gets to pharmaceutical-grade standardization.
- USDA Organic certification end-to-end. Ashwagandha root absorbs heavy metals from soil aggressively. USDA Organic farming standards reduce this risk relative to conventional Indian agriculture. Sports Research carries the USDA Organic seal across the supply chain.
- Single-ingredient, no proprietary blend. Just KSM-66 and vegan capsule excipients. No Tribulus, no Bioperine, no marketing inclusions. You know exactly what you are getting and at what dose.
- Vegan organic pullulan capsule. Cellulose-alternative capsule shell, no gelatin, no synthetic fillers. Suitable for plant-based diets.
- Non-GMO Project Verified. In addition to USDA Organic, Sports Research carries the Non-GMO Project Verified seal, the strictest US non-GMO standard.
- CPED $0.30/day is best-in-class for KSM-66. Cheaper per effective day than Momentous Ashwagandha, Pure Encapsulations Ashwagandha, and most premium-tier KSM-66 SKUs while delivering the same active ingredient at the same dose.
What we don't like
- NOT NSF Certified for Sport. This is the single differentiator vs the TOP PICK in this category. Momentous Ashwagandha (different brand, NooGandha extract, lower 300 mg dose) carries NSF Certified for Sport. Sports Research does not. Athletes subject to WADA-aligned testing should choose Momentous.
- No publicly accessible per-batch COA. Sports Research states third-party testing for purity, but does not publish the batch-level certificates of analysis on the product page or per-bottle. You trust the brand statement rather than verify per-batch.
- KSM-66 vs Shoden positioning ambiguity in Sports Research catalog. Sports Research sells two ashwagandha SKUs: this Organic KSM-66 product, and a separate Shoden softgel (35 percent withanolides, coconut MCT delivery). The two have different active ingredients, different doses, and different positioning. Confusion is common; this review covers the KSM-66 SKU specifically.
- Bottle is 90 capsules / 90 days, no 180-cap version available. Quarterly reorder cadence at single-cap daily dose. Some buyers prefer larger bottles for fewer reorders; this product does not offer a 180-cap variant.
- Stimulating effects can disrupt sleep if taken late. Some users report mild stimulation from ashwagandha (paradoxical given its calming reputation). Best taken in the morning or early afternoon if you are sensitive; some users specifically take it before bed for sleep support. Individual response varies.
- Thyroid medication interaction risk. Ashwagandha modulates thyroid function and can interact with levothyroxine and similar medications. Anyone on thyroid medication should consult their endocrinologist before adding this product.
Cost per effective day (CPED)
Bottle price: $27.00 (brand direct, typical)
Servings per bottle: 90 (1 capsule per serving)
Total KSM-66 per bottle: 90 caps * 600 mg = 54,000 mg
Clinical effective dose per day: 600 mg (top of 300-600 mg range)
Days of effective dosing: 54,000 mg / 600 mg = 90 days
CPED: $27.00 / 90 = $0.30 per effective day
Sports Research Organic Ashwagandha costs $0.30 per effective day at the manufacturer's recommended single-capsule daily dose, which matches the clinical effective range exactly.
For comparison, the lowest-CPED tier on our ashwagandha grid is $0.25 to $0.50 per effective day, achieved by Sports Research, Nutricost KSM-66, and Double Wood KSM-66 at the same KSM-66 600 mg dose. Premium-tier alternatives (Momentous Ashwagandha, Pure Encapsulations Ashwagandha) run $0.50 to $1.20 per effective day for either NSF Certified for Sport positioning (Momentous) or different extract sources (Pure Encapsulations).
The $0.30 CPED is genuinely cheap. The premium some buyers pay for Momentous ($1.00+ per day) is the NSF for Sport certification; that premium is justified for athletes and not justified for non-athletes. Sports Research delivers identical KSM-66 active ingredient at one-third the CPED for non-athlete buyers.
Ingredient-by-ingredient analysis
Ashwagandha (as Organic KSM-66 root extract)
Dose in this product: 600 mg KSM-66 standardized extract per capsule (5 percent withanolides minimum, HPLC verified) Clinical effective dose: 300 to 600 mg/day for KSM-66 specifically; 600 mg/day is the most-studied dose for cortisol, testosterone, and sleep endpoints1 2 3 Evidence level: Strong Verdict for this ingredient: Top of clinical dose range, gold-standard extract specification
KSM-66 is the most-studied ashwagandha extract in the published clinical literature, with over 24 human trials using this specific patented standardization. The extract is produced by Ixoreal Biomed in India using a proprietary "green chemistry" process that avoids alcohol and chemical solvents during extraction, preserving the full spectrum of withanolides while standardizing to a minimum of 5 percent withanolide content via HPLC on every batch.
The clinical evidence converges on three areas relevant for men 40+:
Cortisol regulation. A 2019 trial by Lopresti and colleagues in Medicine (Baltimore) found that 60 days of standardized ashwagandha extract supplementation in stressed adults produced statistically significant reductions in morning cortisol (p < 0.001) and DHEA-S (p = 0.004) versus placebo, alongside reduced anxiety scores on the Hamilton Anxiety Rating Scale4. This trial used a different branded extract (Shoden, 240 mg/day) but the cortisol-modulating mechanism applies broadly to standardized ashwagandha extracts including KSM-66.
Testosterone in aging men. A 2019 Lopresti trial published in American Journal of Men's Health studied 600 mg/day KSM-66 over 8 weeks in aging overweight men1. The trial found a 15 percent increase in salivary testosterone and 18 percent increase in DHEA-S compared with placebo. The effect size is modest (this is not TRT-equivalent), but statistically significant and reproducible across the literature.
Strength training and recovery. A 2015 trial by Wankhede and colleagues in Journal of the International Society of Sports Nutrition studied 600 mg/day KSM-66 over 8 weeks in men beginning a strength training program3. The supplemented group showed significantly greater gains in muscle strength on bench press and leg extension, greater muscle size in arms and chest, and a significant testosterone increase compared with placebo.
Male fertility. A 2013 Ambiye trial in Evidence-Based Complementary and Alternative Medicine studied 675 mg/day standardized ashwagandha root extract over 90 days in oligospermic men2. The trial reported significant improvements in sperm concentration, semen volume, sperm motility, and serum testosterone, with no adverse events.
For our scoring, the dose efficacy criterion is at near-peak (95/100) because the product delivers the top of the studied clinical range in a single capsule. The bioavailability score (90) reflects the KSM-66 standardization rigor, root-only sourcing (not leaves, which contain different alkaloids), and the green-chemistry extraction process that preserves the full withanolide spectrum.
Community sentiment summary
Community sentiment is one signal among seven and is weighted 5% in the EDE Score. In Phase 1 of the DosedWise project, this criterion uses a default neutral score of 50/100. The Reddit Intelligence layer for automated sentiment analysis across r/Supplements, r/Ashwagandha, r/Nootropics, and r/Testosterone ships in Q3 2026, at which point this section will be replaced with quantitative sentiment data from the past 90 days.
Anecdotal observation across men's-health and adaptogen-focused communities: Sports Research Organic Ashwagandha is consistently named as a "best value KSM-66" alongside Nutricost and Double Wood. The most common positive themes are the USDA Organic certification, the single-ingredient simplicity, the matched clinical dose at one capsule per day, and the favorable CPED. The most common negative themes are the absence of NSF Certified for Sport (frequently flagged by athletes), the SKU confusion between Sports Research's KSM-66 product and their separate Shoden product, and the standard ashwagandha caveats around individual response variability and thyroid medication interactions.
This summary is editorial commentary and is not yet weighted into the EDE Score. The score above already accounts for the 5% Community Sentiment weight at the Phase 1 default value.
Compared to alternatives
For ashwagandha supplements, here is how Sports Research Organic Ashwagandha KSM-66 compares to top alternatives we have audited:
| Product | Extract | Dose | EDE Score | CPED | Verdict |
|---|---|---|---|---|---|
| Momentous Ashwagandha | NooGandha (300 mg) | 300 mg | 92/100 | $1.00 | TOP PICK |
| Sports Research Organic Ashwagandha | KSM-66 (5% withanolides) | 600 mg | 89/100 | $0.30 | BUY |
| Nutricost KSM-66 Ashwagandha | KSM-66 (5% withanolides) | 600 mg | 87/100 | $0.25 | BUY |
| Double Wood KSM-66 Ashwagandha | KSM-66 (5% withanolides) | 600 mg | 86/100 | $0.27 | BUY |
| Pure Encapsulations Ashwagandha | Sensoril | 500 mg | 84/100 | $0.55 | BUY |
| Sports Research Ashwagandha (Shoden softgel) | Shoden (35% withanolides) | 120 mg | 81/100 | $0.40 | BUY |
| Generic Amazon ashwagandha 1000 mg | Unstandardized | 1000 mg | 38/100 | $0.10 | SKIP |
Sports Research Organic Ashwagandha and Momentous Ashwagandha are essentially tied on the active ingredient quality axis. Momentous wins by 3 EDE points on NSF Certified for Sport designation (critical for athletes). Sports Research wins decisively on CPED ($0.30 vs $1.00, a 70 percent cost difference for non-athlete buyers). Nutricost and Double Wood KSM-66 SKUs are functionally equivalent to Sports Research at slightly lower CPED but without USDA Organic certification.
If you are a non-athlete optimizing on quality-per-dollar, Sports Research is the rational pick. If you are an athlete subject to drug testing, Momentous is the rational pick despite the CPED premium.
Who should buy this
Sports Research Organic Ashwagandha KSM-66 is best for:
- Men 40+ seeking adaptogenic support for cortisol regulation, modest testosterone improvement, sleep quality, and stress resilience without committing to premium-tier pricing.
- Buyers who specifically value USDA Organic certification (meaningful for ashwagandha given heavy metals concerns in conventional sourcing).
- Stack-builders who want a clean single-ingredient KSM-66 product without proprietary blend bundling.
- Vegans and vegetarians needing an organic pullulan capsule (no gelatin).
- Cost-conscious buyers who want the same KSM-66 active ingredient as premium brands at one-third the CPED.
Sports Research Organic Ashwagandha KSM-66 is NOT for:
- Athletes subject to WADA-aligned drug testing. Choose Momentous Ashwagandha (NSF Certified for Sport) instead.
- Buyers who want batch-level COA verification with public access. Sports Research does not publish per-batch certificates.
- Anyone on thyroid medication (levothyroxine, others) without prior physician consultation. Ashwagandha can modulate thyroid function.
- Pregnant or nursing women. Ashwagandha is contraindicated during pregnancy.
- Anyone with autoimmune conditions (lupus, MS, rheumatoid arthritis) without prior physician consultation. Ashwagandha may stimulate immune function.
Stacking notes
Ashwagandha pairs cleanly with the rest of the men's-health basics:
- Vitamin D3 + K2 (MK-7) at 2,000 to 5,000 IU/day. Vitamin D status modulates testosterone synthesis machinery on which ashwagandha then operates.
- Zinc bisglycinate or picolinate at 15 to 30 mg/day. Foundational mineral for testosterone synthesis.
- Magnesium glycinate or bisglycinate at 300 to 400 mg elemental, especially for evening dosing if ashwagandha is morning-dosed.
- Boron citrate at 6 to 10 mg/day. Modulates free testosterone availability and may complement ashwagandha's hormonal effects.
- L-theanine at 200 mg/day if ashwagandha alone is insufficient for stress reduction. Common stack for high-cortisol individuals.
Timing recommendation: Take Sports Research Organic Ashwagandha in the morning with breakfast, or split-dose by adding a second capsule in the afternoon if you are using the higher 1200 mg/day protocol. Avoid late-evening dosing if you are sensitive to potential mild stimulation; some users prefer pre-bed dosing for sleep support and report no stimulation. Individual response varies.
Cycling protocol: A common protocol is 8 to 12 weeks on, 2 to 4 weeks off, although the human evidence base for cycling is anecdotal rather than trial-derived. The 8-week trial duration is well-validated; longer continuous use beyond 12 weeks has less direct trial data.
If you want the full picture of the men's-health stack, see our best testosterone supplements for men 40+ pillar.
Better alternatives
If Sports Research Organic Ashwagandha KSM-66 does not fit your needs, consider:
- Momentous Ashwagandha (NooGandha 300 mg) (EDE 92/100, CPED $1.00): The TOP PICK in this category for athletes. NSF Certified for Sport, NooGandha extract (different from KSM-66), at the lower 300 mg clinical dose. Premium pricing reflects the NSF for Sport rigor.
- Nutricost KSM-66 Ashwagandha 600 mg (EDE 87/100, CPED $0.25): Same KSM-66 extract at the same dose, slightly lower CPED. Loses points vs Sports Research on USDA Organic certification (Nutricost is conventional, not certified organic).
- Pure Encapsulations Ashwagandha 500 mg (EDE 84/100, CPED $0.55): Different extract (Sensoril, not KSM-66), lower dose, hypoallergenic positioning. A solid pick if you specifically want a non-KSM-66 ashwagandha or are already in the Pure Encapsulations brand ecosystem.
Frequently asked questions
Is Sports Research Organic Ashwagandha worth buying?
Yes. With an EDE Score of 89/100, this is a clinical-grade single-ingredient ashwagandha at the top of the studied dose range, in the gold-standard KSM-66 extract specification, USDA Organic certified, at one of the lowest CPEDs in the category at $0.30 per effective day. The 5-point gap to TOP PICK status comes from NSF Certified for Sport (which Momentous Ashwagandha has and this product does not). For non-athlete buyers, this is one of the strongest BUY tier products in our entire catalog.
What is the difference between KSM-66 and Shoden ashwagandha?
KSM-66 and Shoden are two different patented branded extracts of ashwagandha. KSM-66 is produced by Ixoreal Biomed using a proprietary green-chemistry process and standardized to 5 percent withanolides via HPLC. Shoden is produced by Arjuna Natural and standardized to 35 percent withanolides via a different extraction process that includes both root and leaf material. KSM-66 has substantially more independent published clinical research (24+ human trials); Shoden has fewer trials but with a more concentrated extract per mg. Sports Research sells both: the Organic Ashwagandha SKU uses KSM-66 (this product), and a separate softgel SKU uses Shoden.
What is the best dose of KSM-66 ashwagandha for men 40+?
The clinical effective range for KSM-66 specifically is 300 to 600 mg/day, with 600 mg/day being the most-studied dose for cortisol reduction, testosterone improvement, strength training response, and male fertility outcomes1 3. Sports Research Organic Ashwagandha delivers the 600 mg dose in a single capsule, matching the dose used in the Lopresti 2019 and Wankhede 2015 trials directly.
Will Sports Research Organic Ashwagandha raise my testosterone?
The published evidence supports modest testosterone improvement from KSM-66 ashwagandha at the 600 mg/day dose, with effect sizes around 15 percent salivary testosterone increase in aging overweight men over 8 weeks1, and significant increases in men beginning strength training3 and oligospermic men2. The effect is modest and not equivalent to TRT, but statistically significant and reproducible. Best results in men with sub-optimal baseline testosterone, elevated cortisol, or active strength training programs. Less likely to produce noticeable effects in men already at high-normal testosterone with low baseline stress.
Is this product NSF Certified for Sport?
No. Sports Research Organic Ashwagandha is third-party tested for purity, USDA Organic certified, and Non-GMO Project Verified, but does NOT carry the NSF Certified for Sport seal. If you compete in sports under WADA-aligned testing, choose Momentous Ashwagandha instead (NSF Certified for Sport).
Can I take this product with prescription medications?
Ashwagandha can interact with several medication classes. The most relevant interactions are: (1) thyroid medications (levothyroxine, others) - ashwagandha may amplify thyroid hormone effects; (2) immunosuppressants - ashwagandha may stimulate immune function; (3) sedatives and anti-anxiety medications - ashwagandha may amplify sedative effects; (4) anti-diabetic medications - ashwagandha may lower blood glucose. Always consult your physician before adding ashwagandha to any prescription regimen. Pregnant and nursing women should not use ashwagandha.
Where to buy
This product is widely available across US retailers. Pricing as of audit date (2026-05-03):
- Sports Research direct at the official site. Often ships fastest and is eligible for FSA/HSA at most retailers.
- Amazon if you want Prime delivery and already have an Amazon supplement subscription cadence.
- iHerb typically competitive on per-capsule price with international shipping options.
Cross-check the price across all three on order day. The CPED math we report above is based on the brand direct price; aggressive iHerb or Vitacost promotions can push the per-capsule cost down further.
Final verdict
BUY: Sports Research Organic Ashwagandha is the best-value KSM-66 ashwagandha on the US market for non-athlete buyers seeking the gold-standard extract at the clinical dose.
The EDE Score of 89/100 reflects near-peak performance on dose efficacy (95), bioavailability (90), label transparency (100), and CPED (95), with the 5-point gap to TOP PICK status coming entirely from third-party testing rigor (75, vs Momentous Ashwagandha's NSF Certified for Sport designation). The product delivers the most-studied ashwagandha extract (KSM-66) at the most-studied dose (600 mg) in a single capsule, with USDA Organic certification end-to-end and a CPED of $0.30 per effective day that beats premium-tier alternatives by 70 percent.
Buy this if you want clinical-dose KSM-66 ashwagandha at the best CPED in the category and you are not subject to NSF Certified for Sport requirements. Skip to Momentous Ashwagandha (NooGandha extract, NSF Certified for Sport, EDE 92, CPED $1.00) if you compete in WADA-tested sports.
If you decide to buy:
- Buy direct from Sports Research (paid link)
- Buy on Amazon (paid link)
Methodology and disclosures
This review uses the DosedWise Methodology v1.0. The EDE Score formula is:
EDE Score =
(Dose Efficacy * 0.30) +
(Bioavailability * 0.20) +
(Third-Party Testing * 0.15) +
(Label Transparency * 0.15) +
(Manufacturer Reputation * 0.10) +
(Community Sentiment * 0.05) +
(Price Per Effective Dose * 0.05)
DosedWise earned no payment from Sports Research for this review. We may earn affiliate commissions when readers purchase through links on this page. These commissions never influence scoring. Read our editorial policy.
This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting any supplement, especially if you have a medical condition or take prescription medications. Particular caution applies for ashwagandha given documented interactions with thyroid medications, immunosuppressants, sedatives, and anti-diabetic medications.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Pregnant and nursing women should not use ashwagandha. Anyone with autoimmune conditions or on thyroid medication should consult their physician before starting ashwagandha supplementation.
Community Sentiment is set to a default of 50 in Phase 1 of the DosedWise project. This criterion will be enriched with Reddit and forum data via the DosedWise Reddit Intelligence layer in Q3 2026, at which point this review will be revised.
References
Published: 2026-05-03 Last reviewed: 2026-05-03 Next scheduled review: 2026-11-03 (every 6 months minimum) Author: DosedWise Editorial Team
Footnotes
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Lopresti AL, Drummond PD, Smith SJ. A Randomized, Double-Blind, Placebo-Controlled, Crossover Study Examining the Hormonal and Vitality Effects of Ashwagandha (Withania somnifera) in Aging, Overweight Males. Am J Mens Health. 2019 Mar-Apr;13(2):1557988319835985. PMC6438434. 8-week trial, 600 mg/day KSM-66 in aging overweight men: 15% salivary testosterone increase and 18% DHEA-S increase vs placebo. ↩ ↩2 ↩3 ↩4 ↩5 ↩6
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Ambiye VR, Langade D, Dongre S, Aptikar P, Kulkarni M, Dongre A. Clinical Evaluation of the Spermatogenic Activity of the Root Extract of Ashwagandha (Withania somnifera) in Oligospermic Males: A Pilot Study. Evid Based Complement Alternat Med. 2013;2013:571420. PubMed PMID: 24371462. 90-day trial, 675 mg/day standardized ashwagandha root extract in oligospermic males: significant improvements in sperm concentration, semen volume, motility, and serum testosterone. ↩ ↩2 ↩3 ↩4
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Wankhede S, Langade D, Joshi K, Sinha SR, Bhattacharyya S. Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial. J Int Soc Sports Nutr. 2015 Nov 25;12:43. PubMed PMID: 26609282. 8-week trial, 600 mg/day KSM-66 in men beginning strength training: significantly greater muscle strength gains, muscle size increase in arms/chest, and testosterone increase vs placebo. ↩ ↩2 ↩3 ↩4 ↩5 ↩6
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Lopresti AL, Smith SJ, Malvi H, Kodgule R. An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extract: A randomized, double-blind, placebo-controlled study. Medicine (Baltimore). 2019 Sep;98(37):e17186. PMC6750292. 60-day trial, 240 mg/day standardized ashwagandha extract in stressed adults: significant reductions in morning cortisol (p < 0.001) and DHEA-S (p = 0.004) vs placebo. ↩
Every score on this page comes from the same DosedWise methodology. Affiliate commissions never influence scoring.