supplementOTC supplementSold in the US as an over-the-counter dietary supplement; not FDA-approved as a drugKSM-66 is a specific proprietary root extract; cited trials used Withania somnifera root extract broadly and results may not generalize to every branded product
Ashwagandha KSM-66Benefits, Dosage & Interactions
Also known as: KSM-66
Ashwagandha (Withania somnifera) is an adaptogenic herb widely used in Ayurvedic medicine for centuries. KSM-66 is a branded, full-spectrum extract of ashwagandha root, standardized to a high concentration of total withanolides. Research on Ashwagandha KSM-66 focuses on cognition and mood and sleep quality.
Researched by DoseRoutine R&D TeamReviewed for accuracy by Nicholas Alexander, RSELast updated
Evidence: Strong — 3 human randomized trials published.
Evidence strengthStrong · 4/4
PreclinicalStrong human evidence
3 human randomized trials published.
Plasma half-life
Not applicable
Typical timing
bedtime
Default unit
mg
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
- Reported amounts
- Cited randomized trials used oral Withania somnifera root extract in the range of roughly 300–600 mg per day[1][2][4]
Reported for Ashwagandha KSM-66 in the cited sources. Published ranges are not dosing advice.
References & evidence
Documents the Ashwagandha KSM-66 entry is written from. Each number matches an inline marker above.
- [1]Efficacy and safety of Ashwagandha (Withania somnifera) root extract in pregnant women: a prospective, randomized, double-blind, placebo-controlled studyAjgaonkar A, et al. · Frontiers in Global Women's Health · 2026 · Peer-reviewed · PMID 41767760
- [2]A Prospective, Randomized, Double-Blind, Placebo-Controlled Clinical Study of Efficacy and Safety of Ashwagandha Root ExtractJillella A, et al. · Phytotherapy Research · 2026 · Peer-reviewed · PMID 41770039
- [3]Ninety-day repeated dose toxicity of Ashwagandha (Withania somnifera) root extract in Wistar ratsKalaivani P, et al. · Toxicology Reports · 2023 · Peer-reviewed · PMID 37711361
- [4]Efficacy of Ashwagandha (Withania somnifera [L.] Dunal) in improving cardiorespiratory endurance in healthy athletic adultsChoudhary B, Shetty A, Langade DG · Ayu · 2015 · Peer-reviewed · PMID 26730141
How to track Ashwagandha KSM-66 doses
Tracking Ashwagandha KSM-66 well takes four fields and a habit. Here is what to record so the log is still useful in three months.
- 1
Add the dose and unit
Log Ashwagandha KSM-66 with its dose in mg so totals stay comparable over time — including days when you split the dose or skip it.
- 2
Set the time of day and food rule
Typical timing is bedtime. Reminders fire at that time and can export to your calendar.
- 3
Check it against the rest of the stack
Run Ashwagandha KSM-66 through the interaction checker against everything else in the routine — supplements, peptides, hormones and prescriptions — before it becomes a daily habit.
- 4
Log adherence, not intentions
Mark each dose taken, skipped or delayed as it happens. Weeks of honest logs are what make an adherence rate or a trend line meaningful; retrospective guessing is not.
- 5
Review against outcomes
Review Ashwagandha KSM-66 alongside your logged metrics and any relevant blood work every few weeks before changing the dose, so the change is a response to data rather than to a good or bad day.
What to log each time
- Dose in mg
- Time of day
- Taken / skipped / delayed
- Any side effects or notable changes
What is Ashwagandha KSM-66 studied for?
What is Ashwagandha KSM-66?
Ashwagandha (Withania somnifera) is an adaptogenic herb widely used in Ayurvedic medicine for centuries. KSM-66 is a branded, full-spectrum extract of ashwagandha root, standardized to a high concentration of total withanolides. The extraction process for KSM-66 reportedly uses a 'green chemistry' approach without alcohol or synthetic solvents, aiming to maintain the natural balance of constituents found in the raw root. It is often marketed for its potential in stress reduction, cognitive support, and overall well-being. Unlike some other ashwagandha extracts, KSM-66 focuses on retaining both hydrophilic and lipophilic components of the root. The half-life of relevant compounds from ashwagandha in the human body can vary, but some studies indicate a half-life of approximately 7 hours for certain active constituents.
What does the research say about Ashwagandha KSM-66?
Tap a section to expand.
The therapeutic effects of Ashwagandha KSM-66 are primarily attributed to its active compounds, known as withanolides. These steroid lactones are believed to interact with various biological systems, contributing to its adaptogenic properties. Research suggests that withanolides may modulate the hypothalamic-pituitary-adrenal (HPA) axis, which plays a central role in the body's stress response. By influencing neurotransmitter systems, such as GABAergic and serotonergic pathways, ashwagandha may help regulate mood and anxiety. Furthermore, studies indicate that withanolides exhibit antioxidant activity, which could protect cells from oxidative stress. Some proposed mechanisms also involve anti-inflammatory effects and contributions to neuroprotection, potentially by influencing cellular signaling pathways related to neuronal health and function. The full spectrum nature of KSM-66 aims to leverage the synergistic effects of multiple compounds found naturally in the ashwagandha root, rather than isolating a single active ingredient.
- Stress and Anxiety Reduction: Ashwagandha is perhaps best known for its anxiolytic and adaptogenic properties. Clinical studies (referenced by Examine.com) indicate that supplementation may lead to significant reductions in stress and anxiety levels, often measured by standardized scales and cortisol levels.
- Cognitive Function: Some research suggests that Ashwagandha KSM-66 may support various aspects of cognitive function, including attention, memory, and information processing speed, particularly in individuals experiencing mild cognitive impairment or stress. (NIH ODS)
- Athletic Performance and Muscle Strength: There is evidence from clinical trials (cited by Cochrane reviews) suggesting ashwagandha may enhance physical performance, including improvements in muscle strength, endurance, and recovery, especially in healthy adults and athletes.
- Sleep Quality: Due to its potential to reduce stress and anxiety, ashwagandha may also contribute to improved sleep quality, assisting with sleep onset and overall sleep efficiency. (MedlinePlus)
- Thyroid Function: Preliminary research (reported by PubChem) indicates that ashwagandha might have a beneficial effect on thyroid function, particularly in individuals with subclinical hypothyroidism, though more extensive research is needed to confirm these findings.
The efficacy of Ashwagandha KSM-66 has been investigated in multiple human clinical trials. Many studies focus on its role as an adaptogen, particularly its ability to reduce physiological and psychological markers of stress. For example, research published in peer-reviewed journals (as summarized by Examine.com) has shown statistically significant reductions in serum cortisol levels and improvements in self-reported stress scales (such as the Hamilton Anxiety Rating Scale or Perceived Stress Scale) in participants taking KSM-66 compared to placebo. Evidence regarding cognitive function suggests improvements in memory, attention, and executive function in stressed individuals or those with mild cognitive impairment. Studies on physical performance have indicated modest increases in muscle strength, endurance, and recovery time. While the evidence base is growing, reviews often highlight the need for larger, longer-term studies with diverse populations to fully elucidate the extent and consistency of its benefits. Most human trials common for Ashwagandha KSM-66 are generally well-tolerated, with adverse events being mild and infrequent.
While generally well-tolerated, some individuals may experience mild side effects, including gastrointestinal upset, diarrhea, nausea, and vomiting. In rare cases, liver dysfunction has been reported, though a direct causal link is not always established. Drowsiness or sedation might also occur, especially with higher doses. Allergic reactions, though uncommon, are possible. It's important to discontinue use and consult a healthcare professional if any severe or persistent side effects occur. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Individuals with certain pre-existing conditions should exercise caution. Those with autoimmune diseases (e.g., rheumatoid arthritis, lupus, Hashimoto's thyroiditis) should consult a doctor due to ashwagandha's potential immunomodulatory effects. People with thyroid issues, particularly hyperthyroidism, should be monitored closely as ashwagandha might affect thyroid hormone levels. Since ashwagandha may cause drowsiness, it should be used cautiously by individuals operating heavy machinery or driving. It's advisable to cease ashwagandha supplementation at least two weeks prior to any scheduled surgery due to its potential to interact with anesthetics and affect blood sugar levels. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Ashwagandha KSM-66 is generally contraindicated in pregnant and breastfeeding women due to insufficient safety data. Individuals with a known allergy or hypersensitivity to ashwagandha or other plants in the Solanaceae (nightshade) family should avoid its use. People with stomach ulcers should also exercise caution as ashwagandha may irritate the gastrointestinal tract. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Ashwagandha may interact with several medications and other supplements. Combining it with sedatives (e.g., benzodiazepines, barbiturates), antidepressant medications, or central nervous system depressants (e.g., alcohol, opioids) might lead to increased drowsiness and sedation. Due to its potential to lower blood sugar, it should be used with caution alongside anti-diabetic medications, as it could lead to hypoglycemia. Ashwagandha may also interact with immunosuppressants by potentially enhancing immune activity, and with thyroid hormones due to its possible influence on thyroid function. Therefore, individuals on thyroid medication should consult their doctor. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Ashwagandha KSM-66 can generally be taken with or without food. For supporting sleep or managing evening stress, it is often suggested to take it closer to bedtime. For other benefits, such as cognitive support or general adaptogenic effects throughout the day, it can be taken at any convenient time. Individual responses can vary, and some may find better tolerability or efficacy with a specific timing. Consistency of daily intake is often considered more important than the exact time of day for long-term benefits.
What interacts with Ashwagandha KSM-66?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Any glp1 + supplement | Note | Category ruleConfidence: theoretical | GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.Source pending | Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider. |
| Any supplement + medication | Note | Category ruleConfidence: theoretical | Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).Source pending | Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist. |
| Levothyroxine | Note | Compound pairConfidence: theoretical | May raise thyroid hormone; can amplify levothyroxine effect.Source pending | Monitor TSH when combining. |
Frequently asked questions about Ashwagandha KSM-66
Ashwagandha KSM-66 is a supplement. It is also known as KSM-66. The references summarized come from NIH and PubMed records, FDA labeling where it exists, and Mayo Clinic patient material.
Ashwagandha KSM-66 is commonly discussed in the context of supporting brain and sleep. Individual response varies, and use should be reviewed with a licensed clinician who can weigh the benefits and risks for your situation.
For Ashwagandha KSM-66, it is typically taken in the evening. Always follow the specific dose your clinician or the product label prescribes.
Ashwagandha KSM-66 carries potential side effects and drug interactions, documented in NIH, Mayo Clinic, and FDA label sources. Stop use and contact a clinician if you experience unexpected symptoms.
As a supplement, Ashwagandha KSM-66 can overlap with other supplements, prescription medicines, hormones and peptides. Because Ashwagandha KSM-66 is usually taken in the evening, most avoidable conflicts come from what else lands in that same window. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Ashwagandha KSM-66 with no sign-up.
Whether Ashwagandha KSM-66 fits alongside testosterone replacement therapy depends on the protocol — dose, ester and ancillaries such as HCG or anastrozole — and on current bloodwork. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
"Peptides" is not one category — healing peptides, GLP-1 agonists, growth-hormone secretagogues and melanocortins each behave differently next to Ashwagandha KSM-66. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
Published frequency for Ashwagandha KSM-66 varies by protocol and formulation, so the label or prescription is what sets it. It is typically taken in the evening. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
The effect of a missed dose of Ashwagandha KSM-66 depends on the protocol and formulation you are on. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For Ashwagandha KSM-66 the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
Verify at
Publisher search links for Ashwagandha KSM-66. These are places to check the information — they are not citations, so they are not numbered.
- Examine.com(publisher search, opens in a new tab)Examine.com · publisher search
- NIH Office of Dietary Supplements(publisher search, opens in a new tab)National Institutes of Health · publisher search
- MedlinePlus(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- PubChem(publisher search, opens in a new tab)National Center for Biotechnology Information · publisher search
- Cochrane Library(publisher search, opens in a new tab)Cochrane · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- DailyMed labeling archive(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Ashwagandha KSM-66?
Plain-text summary, safe to quote verbatim:
Ashwagandha (Withania somnifera) is an adaptogenic herb widely used in Ayurvedic medicine for centuries. KSM-66 is a branded, full-spectrum extract of ashwagandha root, standardized to a high concentration of total withanolides. Research on Ashwagandha KSM-66 focuses on cognition and mood and sleep quality.
Source: DoseRoutine — https://doseroutine.com/library/ashwagandha-ksm-66
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Ashwagandha KSM-66 — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/ashwagandha-ksm-66
What compounds are similar to Ashwagandha KSM-66?
Others in the supplement category or studied for the same goals.
Which goals is Ashwagandha KSM-66 used for?
Other compounds studied for the same benefits as Ashwagandha KSM-66.
Brain & Cognition
See all →Continue exploring
See every compound DoseRoutine catalogs for these goals.