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Ashwagandha Supplements
Compare US ashwagandha products by actual extract, daily dose, price and testing status. Understand KSM-66 and Sensoril labels, stress and sleep evidence, and safety considerations.
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Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Verified independent evidence
Manufacturer statement
Product page states: 'Every batch of Ashwagandha KSM-66® is independently tested by a third-party laboratory...' and the downloadable Certificate of Analysis names AGROLAB LUFA GmbH and says the sample code 'Ashwagandha KSM-66' was examined for the listed parameters.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Verified independent evidence
Manufacturer statement
Product page states: 'Every batch of Ashwagandha KSM-66® is independently tested by a third-party laboratory...' and the downloadable Certificate of Analysis names AGROLAB LUFA GmbH and says the sample code 'Ashwagandha KSM-66' was examined for the listed parameters.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Testing claimed
Manufacturer statement
Amazon listing says: "SOIL ASSOCIATION CERTIFIED ORGANIC: Our product has gone through rigorous checks and has been thoroughly tested to acquire all necessary approvals to be certified Organic by the prestigious Soil Association." Horbaach's own site also says: "We put our products to the test..." and "test each individual product to ensure it meets our strict Quality Assurance Standards," but I did not find an independently verifiable product-specific certificate/registry entry or COA for this exact product.
Compare actual extract mass and disclosed withanolides. Raw-herb equivalents are marketing figures, not interchangeable extract doses. Daily amounts use the recorded label serving. Badges use extract-specific study ranges where available; otherwise they compare actual extract mass with a 250–600 mg/day reference. That numerical reference does not establish equivalent effects between extracts. Read the dose guide ↓
Product page states: 'Every batch of Ashwagandha KSM-66® is independently tested by a third-party laboratory...' and the downloadable Certificate of Analysis names AGROLAB LUFA GmbH and says the sample code 'Ashwagandha KSM-66' was examined for the listed parameters.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Nutricost product page says: “Third-Party Tested †” and “Third-Party Tested † Nutricost products are tested by an independent, accredited lab to help verify that what’s on the label is what’s in the bottle.”
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Amazon listing says: "SOIL ASSOCIATION CERTIFIED ORGANIC: Our product has gone through rigorous checks and has been thoroughly tested to acquire all necessary approvals to be certified Organic by the prestigious Soil Association." Horbaach's own site also says: "We put our products to the test..." and "test each individual product to ensure it meets our strict Quality Assurance Standards," but I did not find an independently verifiable product-specific certificate/registry entry or COA for this exact product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer site says the product is "Lab Tested" and the brand says it is "committed to quality, ensuring that all products meet rigorous safety and efficacy standards."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
BioSchwartz FAQ includes the testing-related question “Are your products tested for purity & quality?” but I did not find any independently verifiable COA, lab report, or certification page for the specific BioSchwartz KSM-66 Ashwagandha 1200mg product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer site says: "At Physician’s Choice, our mission is to ensure everyone has access to safe, high-quality supplements that actually work. We research and produce innovative products that are science-backed and always third-party tested for potency and purity."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Pure Encapsulations product PDF says: "Tested for solvents, pesticides, heavy metals and microbial contaminants, as are all Pure Encapsulations herbal extracts."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Solaray’s product page says: “We source our own raw materials and triple-test every lot” and “15,000 tests per month verify ingredient potency and purity,” plus “Passed Testing for Heavy Metals,” “Passed Testing for Microbials,” and “Passed Testing for Contaminants.” It also says the facility is “certified by NSF,” but I did not find an independent registry page confirming this specific ashwagandha product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Organic India’s certifications page states: “We have Organic Certifications from Control Union and SGS as per USDA, EU and NPOP Organic Standards” and includes a Non-GMO Project link (“Click Here -> http://www.nongmoproject.org/find-non-gmo/search-participating-products/search/?brandId=2047s”). However, I did not find an independently verifiable registry page confirming this specific Ashwagandha product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Nature Made’s own product page says: “Our quality standards are industry-leading, from ingredient sourcing and manufacturing to third-party verification of our products.” It also says the Ashwagandha Capsules are “formulated with clinically studied SENSORIL® Ashwagandha to reduce stress.”
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Zhou Nutrition’s Quality page says: “Triple Tested Supplements… Before every product gets to you, it has been lab tested three times… No Skip Lot Testing. We test every batch, every time. Composite Testing… Identity, Purity, Potency. We test each ingredient and product to make sure it’s authentic, clean, and active.”
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer certifications page says: "From raw materials to finished batches, Bronson supplements undergo numerous laboratory tests to ensure quality standards are met. We offer a variety of products that are laboratory tested..."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
NOW Foods’ COA site states: “A COA confirms that the product you purchased has gone through detailed testing and adheres to its product specifications and NOW standards.” The Amazon listing also shows a NOW image saying “by conducting 31,000 quality tests each month” and an Intertek GMP certification graphic, but I did not find an independently verifiable product-specific COA or registry entry for this exact ashwagandha product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Himalaya USA product page says: "every lot passes more than 25 tests for identity, purity, and safety, including seven tests for microbial safety. DNA-based plant identification confirms only authentic Ashwagandha root is used". It also says the product is "USDA Organic" and "Non-GMO Project Verified," but I did not verify a product-specific registry entry for this item.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer site says the product is made to 'modern quality standards' and the brand page says it uses 'scientific validation' and 'testing its therapeutic property,' but I did not find any independent, product-specific purity/potency certification, COA, or third-party lab report for this exact product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Product page states: 'Every batch of Ashwagandha KSM-66® is independently tested by a third-party laboratory...' and the downloadable Certificate of Analysis names AGROLAB LUFA GmbH and says the sample code 'Ashwagandha KSM-66' was examined for the listed parameters.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Nutricost product page says: “Third-Party Tested †” and “Third-Party Tested † Nutricost products are tested by an independent, accredited lab to help verify that what’s on the label is what’s in the bottle.”
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Amazon listing says: "SOIL ASSOCIATION CERTIFIED ORGANIC: Our product has gone through rigorous checks and has been thoroughly tested to acquire all necessary approvals to be certified Organic by the prestigious Soil Association." Horbaach's own site also says: "We put our products to the test..." and "test each individual product to ensure it meets our strict Quality Assurance Standards," but I did not find an independently verifiable product-specific certificate/registry entry or COA for this exact product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer site says the product is "Lab Tested" and the brand says it is "committed to quality, ensuring that all products meet rigorous safety and efficacy standards."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
BioSchwartz FAQ includes the testing-related question “Are your products tested for purity & quality?” but I did not find any independently verifiable COA, lab report, or certification page for the specific BioSchwartz KSM-66 Ashwagandha 1200mg product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer site says: "At Physician’s Choice, our mission is to ensure everyone has access to safe, high-quality supplements that actually work. We research and produce innovative products that are science-backed and always third-party tested for potency and purity."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Pure Encapsulations product PDF says: "Tested for solvents, pesticides, heavy metals and microbial contaminants, as are all Pure Encapsulations herbal extracts."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Solaray’s product page says: “We source our own raw materials and triple-test every lot” and “15,000 tests per month verify ingredient potency and purity,” plus “Passed Testing for Heavy Metals,” “Passed Testing for Microbials,” and “Passed Testing for Contaminants.” It also says the facility is “certified by NSF,” but I did not find an independent registry page confirming this specific ashwagandha product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Organic India’s certifications page states: “We have Organic Certifications from Control Union and SGS as per USDA, EU and NPOP Organic Standards” and includes a Non-GMO Project link (“Click Here -> http://www.nongmoproject.org/find-non-gmo/search-participating-products/search/?brandId=2047s”). However, I did not find an independently verifiable registry page confirming this specific Ashwagandha product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Nature Made’s own product page says: “Our quality standards are industry-leading, from ingredient sourcing and manufacturing to third-party verification of our products.” It also says the Ashwagandha Capsules are “formulated with clinically studied SENSORIL® Ashwagandha to reduce stress.”
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Zhou Nutrition’s Quality page says: “Triple Tested Supplements… Before every product gets to you, it has been lab tested three times… No Skip Lot Testing. We test every batch, every time. Composite Testing… Identity, Purity, Potency. We test each ingredient and product to make sure it’s authentic, clean, and active.”
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer certifications page says: "From raw materials to finished batches, Bronson supplements undergo numerous laboratory tests to ensure quality standards are met. We offer a variety of products that are laboratory tested..."
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
NOW Foods’ COA site states: “A COA confirms that the product you purchased has gone through detailed testing and adheres to its product specifications and NOW standards.” The Amazon listing also shows a NOW image saying “by conducting 31,000 quality tests each month” and an Intertek GMP certification graphic, but I did not find an independently verifiable product-specific COA or registry entry for this exact ashwagandha product.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Himalaya USA product page says: "every lot passes more than 25 tests for identity, purity, and safety, including seven tests for microbial safety. DNA-based plant identification confirms only authentic Ashwagandha root is used". It also says the product is "USDA Organic" and "Non-GMO Project Verified," but I did not verify a product-specific registry entry for this item.
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Manufacturer site says the product is made to 'modern quality standards' and the brand page says it uses 'scientific validation' and 'testing its therapeutic property,' but I did not find any independent, product-specific purity/potency certification, COA, or third-party lab report for this exact product.
One-time purchase prices; delivery and conditional discounts excluded. Daily cost uses the recorded label serving. Comparison amounts are not personal dose recommendations. Unknown Prime eligibility is not treated as confirmed.
Ashwagandha extracts explained
Start with the preparation, then the amount. The branded-extract cards in the evidence section explain the labels used in this comparison.
Reading an extract label
Three separate measurements
Extract mass
The actual ingredient per serving
Standardization
A declared marker percentage or amount
A root-equivalent number describes starting material, not additional extract. Missing percentages stay unknown; neither a botanical name nor a capsule count fills that gap.
Ashwagandha dosage: compare the actual extract
Why there is no universal dose
NIH ODS describes studies using different preparations and amounts. A sleep study of KSM-66 used 600 mg/day; a Shoden study used 120 mg/day. These examples are not interchangeable doses or personal recommendations. There is no established nutritional RDA or universal upper intake level for this botanical.
Decode a 3,000 mg headline
If 300 mg of a 10:1 extract is described as equivalent to 3,000 mg of root, the capsule still contains 300 mg of extract. This illustrative calculation does not confirm the contents of any product. Do not add both figures together.
Read the complete serving
A two-capsule serving containing 600 mg supplies 300 mg per capsule only if the label specifies equal capsules. Where 5% withanolides is explicitly declared for that 600 mg extract, the arithmetic is 30 mg. A higher marker percentage is not proof of better results.
How the range badges work: Compare actual extract per day, after multiplying the serving amount by the recorded servings per day. KSM-66, Sensoril and Shoden use their own published-study ranges. Other extracts use a 250–600 mg/day extract-mass reference: below, within or above describes that numerical comparison only. It does not establish research equivalence, effectiveness or a recommended intake. Plant part, concentration and the preparation studied still matter.
Branded extracts and the evidence
KSM-66
A branded root extract used in some trials. Match the actual daily amount and standardization to the study; the trademark does not verify this retail bottle.
Sensoril
A branded root-and-leaf extract. Its specifications and study doses differ from root-only preparations; compare its own evidence.
Shoden
Another root-and-leaf extract studied at smaller extract masses. A smaller milligram number is not automatically a weak dose.
Generic extract
An unbranded preparation can still disclose useful detail. Check the plant part, extraction and marker information instead of assuming equivalence to a named extract.
NIH ODS compares the preparations used in studies. A US government review can summarize research conducted abroad; it does not mean each trial was conducted in Americans or that the government endorses a brand.
Ashwagandha benefits: stress, sleep and the evidence
Evidence by goal
Goal
Evidence strength
What was assessed
Typical study context
Main limitation
Perceived stress
Promising, short-term
Various extracts
Small studies over weeks
Not proof of treating an anxiety disorder
Sleep
Small potential benefit
Different extracts
Limited adult trials
Not a universal sleep remedy
Cortisol and weight loss
Different outcomes
Extract studies
Some hormone measurements
A cortisol change does not demonstrate fat loss
Testosterone and fertility
Limited evidence
Selected preparations
Selected populations
No general male or female fertility recommendation
Read the full evidence-by-goal detail
NIH ODS describes small studies suggesting improvements in stress and sleep. The evidence does not establish which retail product is best. NCCIH considers anxiety evidence unclear, notes limited testosterone/sperm findings, and finds insufficient evidence for menopause or female infertility. Treat these as separate questions rather than one broad “hormone balance” claim.
A comparison score evaluates recorded product information. It does not quantify symptom improvement or validate a cortisol, weight-loss or fertility promise.
When to take ashwagandha and how long it takes
Research summarized by NIH ODS commonly assessed outcomes after several weeks, including 6–8 weeks for stress. This does not establish an immediate calming effect, a guaranteed response date or an ideal clock time.
Morning or evening?
Follow the label and consider tolerability. Do not assume all extracts need the same schedule or use drowsiness as a reason to drive while impaired.
Continuous use or cycling?
A seller’s cycling schedule is not proof of long-term safety. Discuss continued use if symptoms persist instead of escalating the dose or combining several stress products.
Ashwagandha side effects and safety
Who should be cautious?If any of the following apply to you, speak to a healthcare professional before taking Ashwagandha - see the full detail below for why.
Pregnancy or breastfeeding: avoid use
Thyroid or autoimmune disorders, planned surgery, or hormone-sensitive prostate cancer
Existing liver disease or medicines with possible interactions
NCCIH reports possible drowsiness, stomach upset, diarrhea and vomiting; longer-term safety beyond approximately three months is uncertain. It advises avoidance in pregnancy and breastfeeding and cautions against use with thyroid/autoimmune disorders or before surgery.
Liver symptoms deserve attention
NIH LiverTox documents uncommon but potentially serious liver injury, sometimes beginning weeks after starting. Avoid use with advanced liver disease. Stop and seek medical advice for yellow skin or eyes, dark urine or marked itching; do not restart after a suspected liver reaction without clinical advice.
Ashwagandha interactions and combinations
NCCIH identifies potential interactions with thyroid medicines, sedatives, anticonvulsants, immunosuppressants, diabetes medicines and blood-pressure drugs. Ask a pharmacist to review the full list of medicines and supplements.
Check stress blends for additional ashwagandha, melatonin or other active ingredients. The ashwagandha dose alone cannot characterize a combination’s effects. Record the whole serving rather than treating a proprietary blend’s total weight as pure extract.
Ashwagandha for men and women
An adult considering a product for stress or sleep can use the evidence and safety sections to weigh the limited potential benefit. Persistent anxiety or sleep disruption deserves assessment rather than relying on a comparison ranking.
“For men,” “for women” and “over 50” describe marketing audiences, not proven dose categories. Fertility concerns and pregnancy planning need appropriate care; this page does not establish a hormone-treatment protocol.
Testing, sourcing and label transparency
Testing review pending means the detailed product evidence review is unfinished. While testing is pending, it is excluded and the score is provisional. It does not mean a product failed testing or that no evidence exists.
FDA does not approve supplements for safety and effectiveness before sale. Check the exact product and lot behind a quality claim.
A useful report identifies the product, batch, laboratory, date, methods and results. Ingredient identity, measured content and contaminant testing answer different questions. A raw-material certificate is not automatically evidence for the bottle you buy. See how we verify testing.
For ashwagandha, look for botanical identity, plant part, extract mass and the method behind a withanolide claim. A source trademark and independent finished-product testing are separate matters.
Cortisol tests: what a result can tell you
MedlinePlus explains that cortisol testing may use blood, saliva or urine and helps investigate adrenal or pituitary problems. Timing, stress, exercise and medicines can affect results; one measurement cannot diagnose the cause.
No target “stress score”
A supplement-related cortisol change in a study does not establish a number everyone should aim for. Do not select a dose from a home test or a weight-loss advertisement.
Give the clinician the full context
Share the product, serving and start date, particularly if thyroid or liver tests are being interpreted. Follow the laboratory’s preparation instructions and do not stop prescribed medicines on your own.
Testing evidence in this comparison
A testing claim is not the same as a verified report. No public evidence located does not mean a product has not been tested.
Testing review pending0
Recognised certification0
Verified independent evidence1
Manufacturer COA0
Testing claimed14
No public evidence located3
What does ashwagandha cost?
Current US comparison set, based on the daily serving shown on each label.
$0.06Lowest daily cost
$0.38Median daily cost
$1.00Highest daily cost
Price insights
Shown only where the underlying product data is reliable.
