NICEVIVA
MONOGRAPH SPEC LATEST 2026

KSM-66 Ashwagandha

BOTANICALS · Evidence Monograph

KSM-66 Ashwagandha is an evidence-graded botanicals monograph evaluated across 5 peer-reviewed PubMed studies (0 meta-analyses, 0 systematic reviews, and 2 randomized controlled trials, encompassing n = 117 cumulative participants). Current clinical evidence is rated GRADE Moderate (3.0 / 4.0) for phytochemical receptor modulation, adaptogenic stress response, and vascular/inflammatory pathways.

Evidence Grade (GRADE) Moderate (3.0 / 4.0)
Indexed PubMed Studies 5 Studies
Meta-Analyses · Reviews 0 Meta · 0 Systematic Reviews
Randomized Trials (RCT) 2 RCTs (2 Double-Blind)
Cumulative Participants n = 117
Reported Trial Dosages 300 mg
Trial Duration Range 12 weeks · 14 days · 8 weeks
Reading Time ~4 min
RECOMMENDED FOR Clinical Indication

Evidence Supports Supplementation When:

  1. 01 Individuals seeking evidence-backed support for phytochemical receptor modulation, adaptogenic stress response, and vascular/inflammatory pathways (supported by 5 indexed PubMed studies, GRADE Moderate).
  2. 02 Adults matching clinical trial dosing protocols (300 mg) over a structured 12 weeks evaluation window.
  3. 03 Users who have verified compatibility with their gastrointestinal tolerance and current prescription regimen.
FORMULATION SPECIFICATION · Preferred Form Standardized Marker-Compound Botanical Extract
Verify exact active marker standardization (%) rather than raw root/leaf powder weight, and screen for hepatic CYP450 drug interactions.
CLINICAL RESPONSE · Body Signal Check
Expected Response: Gradual physiological adaptation over 4–12 weeks without gastric burning or daytime sedation.
Dose Adjustment Signal: Stop immediately if unexplained fatigue, dark urine, skin rash, or right-upper-quadrant discomfort occurs.
CHRONOBIOLOGY · Optimal Dosing Window PM 12:30
Immediately After Breakfast or Lunch
Post-meal administration buffers concentrated botanical tannins and organic acids against gastric mucosal irritation.
Primary Clinical Endpoints & Physiological Biomarkers Studied Based on Indexed PubMed Trials
Primary botanicals clinical efficacy (5 PubMed studies)
Quantitative biomarker & outcome analysis (3 studies with effect-size/sample data)
Randomized controlled trial verification (2 RCTs · 2 double-blind)
Systematic review & meta-analysis synthesis (0 meta-analyses · 0 reviews)
01

What Is KSM-66 Ashwagandha & Why Does Form Matter?

KSM-66 Ashwagandha is classified under BOTANICALS and has been investigated across 5 peer-reviewed PubMed publications for its role in phytochemical receptor modulation, adaptogenic stress response, and vascular/inflammatory pathways.

In clinical nutrition, physiological efficacy depends heavily on the specific chemical salt, chelate, or standardized extract used, as well as adherence to trial-validated dosing (300 mg).

02

Who Benefits Most & Common Depletion Factors

Suboptimal status or increased physiological demand for KSM-66 Ashwagandha frequently arises from restrictive dietary patterns, age-related declines in gastrointestinal absorption, chronic metabolic stress, or medication-induced nutrient depletion.

Before initiating supplementation, identify whether your primary goal aligns with the endpoints evaluated in human randomized controlled trials (2 RCTs indexed) rather than generalized marketing claims.

03

Physiological Mechanism of Action

Within human physiology, KSM-66 Ashwagandha acts on pathways governing phytochemical receptor modulation, adaptogenic stress response, and vascular/inflammatory pathways. Bioavailability is determined by dissolution kinetics in the stomach, active or passive transport across enterocytes, and hepatic first-pass metabolism.

Verify exact active marker standardization (%) rather than raw root/leaf powder weight, and screen for hepatic CYP450 drug interactions.

04

PubMed Clinical Evidence & GRADE Evaluation

NICEVIVA assigns KSM-66 Ashwagandha an overall evidence rating of GRADE Moderate (3.0 / 4.0) based on 5 PubMed studies: 0 meta-analyses, 0 systematic reviews, and 2 randomized controlled trials (2 double-blind, n = 117 total participants).

Representative peer-reviewed findings include: • PMID:41767760 (2026) — "Efficacy and safety of Ashwagandha (Withania somnifera) root extract in pregnant women: a prospective, randomized, comparative, open-label, 12-week study." (DISCUSSION: ARE supplementation for 12 weeks improved hemoglobin levels, RBC quality, perceived stress, and multiple aspects of sleep in pregnan) • PMID:38006746 (2023) — "Effects of Withania somnifera root extract serum application on hair health in healthy adults: A prospective, double-blind, randomized, parallel, placebo-controlled study." (CONCLUSION: The study found that topical Ashwagandha (serum) improved hair growth and hair health indicators.) • PMID:37711361 (2023) — "Ninety-day repeated dose toxicity of Ashwagandha (Withania somnifera) root extract in Wistar rats." (The present results show that the no observed adverse effect level (NOAEL) of KSM-66 Ashwagandha Root Extract was considered to be 2000 mg/kg body weight/day in rats after repeated oral administration for 90-day under the present study conditions.)

05

Formulation Selection, Dosing & Chronobiology

Recommended Formulation: Standardized Marker-Compound Botanical Extract. Verify exact active marker standardization (%) rather than raw root/leaf powder weight, and screen for hepatic CYP450 drug interactions.

Clinical Trial Dosing & Timing: Published studies most commonly utilize 300 mg over 12 weeks · 14 days · 8 weeks. Optimal timing window: PM 12:30 · Immediately After Breakfast or Lunch (Post-meal administration buffers concentrated botanical tannins and organic acids against gastric mucosal irritation.).

06

Body Response Monitoring & Dose Adjustment

Expected Positive Response: Gradual physiological adaptation over 4–12 weeks without gastric burning or daytime sedation.

Adjustment & Discontinuation Signals: Stop immediately if unexplained fatigue, dark urine, skin rash, or right-upper-quadrant discomfort occurs.

07

Prescription Drug Interactions & Contraindications

No major high-risk prescription contraindications are flagged in the primary index for KSM-66 Ashwagandha, but divalent minerals, fat-soluble compounds, and botanical extracts can still alter absorption or CYP450 metabolism of concurrent medications.

Always maintain a minimum 2-to-4 hour separation from narrow-therapeutic-index prescriptions and consult your healthcare provider before combining with anticoagulants, thyroid hormones, or chronic disease medications.

08

4 Essential Safety Rules Before & After Dosing

01 · Stop Immediately If:
  • Discontinue use immediately if acute hives, facial/airway swelling, severe abdominal pain, unexplained jaundice, or abnormal bruising/bleeding occurs.
  • Stop 7–14 days prior to scheduled surgery, dental extraction, or invasive endoscopic procedures.
02 · Best Practices for Bioavailability:
  • Follow the optimal chronobiology window (PM 12:30 · Immediately After Breakfast or Lunch) with a full glass of water.
  • Stay within clinically studied daily dosages (300 mg) and re-evaluate efficacy after 12 weeks.
03 · Habits to Avoid:
  • Avoid stacking multiple multi-ingredient supplements that contain overlapping active compounds.
  • Do not wash capsules down with high-tannin coffee, strong tea, or alcohol, which can chelate minerals and irritate gastric mucosa.
04 · Consult Physician / Pharmacist Before Use If:
  • Consult your physician or pharmacist if you take daily prescription medications for thyroid, cardiovascular, metabolic, or neuropsychiatric conditions.
  • Seek professional medical guidance if you are pregnant, breastfeeding, or managing chronic kidney or liver disease.
09 · PUBMED CLINICAL STUDIES

Indexed PubMed Clinical Studies & Abstracts (5 Studies) · 3 Quantitative Analyses

01
RANDOMIZED TRIAL (RCT) Frontiers in global women's health (2026) PMID: 41767760 ↗
Efficacy and safety of Ashwagandha (Withania somnifera) root extract in pregnant women: a prospective, randomized, comparative, open-label, 12-week study.
Clinical Trial Synthesis 2026 Randomized Controlled Trial (RCT) published in Frontiers in global women's health involving n = 32 participants; statistical significance reported at p = 0.003. Key conclusion: DISCUSSION: ARE supplementation for 12 weeks improved hemoglobin levels, RBC quality, perceived stress, and multiple aspects of sleep in pregnan
View Original PubMed Abstract ↓

INTRODUCTION: Pregnancy is associated with increased risk of anemia, high psychological stress, and sleep disturbances, yet safe therapeutic options remain limited. Ashwagandha (Withania somnifera) root extract (ARE) possesses adaptogenic and hematopoietic potential, but evidence in pregnant women is scarce. The aim of the current study is to evaluate the efficacy and safety of ARE on hematological parameters and on stress, sleep quality, and laboratory safety markers in pregnant women. METHODS: This 12-week, prospective, randomized, open-label, comparative trial enrolled 70 pregnant women in the second trimester. Participants received either ARE 300 mg twice daily plus standard hematinic therapy or standard hematinic therapy (standard of care; SOC) alone. Primary endpoints included changes in hemoglobin (Hb) and red blood cell (RBC) indices. Secondary endpoints included perceived stress, sleep quality, and safety assessments (adverse events, liver, renal, cardiac, and thyroid markers). Efficacy was analyzed in the per-protocol population; safety in the intention-to-treat population. RESULTS: Of 70 randomized participants, 63 completed the study (ARE: n = 32; SOC: n = 31). ARE supplementation produced significant improvements in hematological parameters: Hb increased by 1.06 ± 0.44 g/dL vs. 0.78 ± 0.24 g/dL with SOC (between-group difference 0.28 g/dL; p = 0.003), mean corpuscular hemoglobin concentration improved significantly (difference 0.73 g/dL; p = 0.017), and red cell distribution width decreased markedly (difference -0.57%; p < 0.001). RBC count and hematocrit showed favorable but non-significant trends. ARE significantly reduced perceived stress at Week 12 (-10.50 vs. -5.35; p < 0.001) and improved key sleep parameters, including subjective sleep quality at all visits (p = 0.036), sleep duration (Week 8 and 12; p < 0.001), and sleep disturbances (Week 12; p = 0.028). No adverse events or serious adverse events occurred. Laboratory evaluations showed no detrimental effects on hepatic, renal, or thyroid function. DISCUSSION: ARE supplementation for 12 weeks improved hemoglobin levels, RBC quality, perceived stress, and multiple aspects of sleep in pregnan

02
RANDOMIZED TRIAL (RCT) Journal of Ayurveda and integrative medicine (2023) PMID: 38006746 ↗
Effects of Withania somnifera root extract serum application on hair health in healthy adults: A prospective, double-blind, randomized, parallel, placebo-controlled study.
Clinical Trial Synthesis 2023 Randomized Controlled Trial (RCT) published in Journal of Ayurveda and integrative medicine involving n = 61 participants; statistical significance reported at p = 0.001. Key conclusion: CONCLUSION: The study found that topical Ashwagandha (serum) improved hair growth and hair health indicators.
View Original PubMed Abstract ↓

BACKGROUND: Alopecia is a dermatological condition affecting genders, negatively impacting their personality and quality of life (QoL). The current approved entities are limited, inconsistently effective, and associated with negative side effects. To alleviate this issue, ayurvedic herbs such as Ashwagandha have being explored. As a result, this study was designed to evaluate the efficacy and safety of Ashwagandha (root extract) topical formulation (serum) on hair health in healthy adults. METHODS: In this prospective, double-blind, randomized, placebo controlled, two arm, parallel, comparative study, the effects of topical Ashwagandha on the hair health was evaluated. Healthy adults between 18 and 45 years with mild to moderate hair loss were randomized to either Ashwagandha (topical) or Placebo (topical) treatment. The participants were assessed at Day-1 and Day-75 for change in efficacy parameters, which included 60 Seconds Hair Comb, Trichoscan analysis, Hair Pull test, Investigator's Global Assessment (IGA) and QoL using Hair-specific Skindex-29. RESULTS: In the per protocol analysis of 61 participants, Ashwagandha group demonstrated significant reduction in hair shedding in the 60 Seconds Hair Comb test compared to Placebo at day 75. Similarly, Ashwagandha substantially enhanced hair density, growth, and thickness compared to the Placebo group (density = 7.3 vs. 2.8, P < 0.001; growth = 21.7 vs. 4.2, P < 0.001; thickness = 1.8 vs. 0.9, P < 0.001). In addition, Ashwagandha significantly improved QOL compared to placebo (Score = -17.3 vs. -6.1, P = 0.011). CONCLUSION: The study found that topical Ashwagandha (serum) improved hair growth and hair health indicators. Thus, it can be an effective and safer alternative for alopecia. STUDY REGISTRATION: CTRI, Number CTRI/2022/11/047539, Registered on: 23/11/2022.

03
CLINICAL STUDY Toxicology reports (2023) PMID: 37711361 ↗
Ninety-day repeated dose toxicity of Ashwagandha (Withania somnifera) root extract in Wistar rats.
Clinical Trial Synthesis 2023 Clinical Study published in Toxicology reports. Key conclusion: The present results show that the no observed adverse effect level (NOAEL) of KSM-66 Ashwagandha Root Extract was considered to be 2000 mg/kg body weight/day in rats after repeated oral administration for 90-day under the present study conditions.
View Original PubMed Abstract ↓

Many pharmacological studies have been carried out to describe multiple biological properties of Ashwagandha (Withania somnifera) and the additional safety information on repeated dose toxicity is limited. Therefore, the aim of this study was to obtain safety data for KSM-66 Ashwagandha Root Extract (ARE) through repeated-dose toxicity in Wistar rats according to the Organisation for Economic Co-operation and Development (OECD) test guideline (TG 408). ARE was orally administered to rats at doses of 0, 500, 1000, and 2000 mg/kg body weight/day for 90-day and reversibility of effects of 0 and 2000 mg/kg body weight/day was assessed for 14 days. All the animals from treated, control, recovery control and recovery groups were observed for clinical signs of toxicity once daily, detailed clinical examination every week after dosing and before necropsy day. Mortality/Morbidity was observed twice daily. In addition, observations were noted in the detailed sensory reactivity, functional assessments, body weight, food consumption, ophthalmological examination, hematological parameters, biochemical parameters, organ weights, histopathological findings. The present results show that the no observed adverse effect level (NOAEL) of KSM-66 Ashwagandha Root Extract was considered to be 2000 mg/kg body weight/day in rats after repeated oral administration for 90-day under the present study conditions. © 2023 The Authors.

04
CLINICAL STUDY Heliyon (2021) PMID: 34765761 ↗
Neuroprotective effects of Withania somnifera in the SH-SY5Y Parkinson cell model.
Clinical Trial Synthesis 2021 Clinical Study published in Heliyon. Key conclusion: The rescue of mitochondria with 0.5 mg/ml KSM-66 extract showed an increase in ATP levels.
View Original PubMed Abstract ↓

Parkinson's disease is the most frequent neurodegenerative motor disorder. The clinical syndrome and pathology involve motor disturbance and the degeneration of dopaminergic neurons in the substantia nigra. Root extracts of Withania. somnifera, commonly called Ashwagandha, contain several major chemical constituents known as withanolides. Studies have shown that W. somnifera extracts exhibit numerous therapeutic effects including inflammation and oxidative stress reduction, memory and cognitive function improvement. This study aimed to evaluate the protective effects of KSM-66, W. somnifera root extract, on 6-hydroxydopamine (6-OHDA)-induced toxicity in the human neuroblastoma SH-SY5Y cell line, as well as the associated oxidative response protein expression and redox regulation activity focused on S-glutathionylation. SH-SY5Y cells were treated with 6-OHDA preceded or followed by treatment with the KSM-66 extract. Using KSM-66 concentrations ranging from 0.25 to 1 mg/ml before and after treatment of the cells with 6-OHDA has resulted in an increased viability of SH-SY5Y cells. Interestingly, the extract significantly increased glutathione peroxidase activity and thioltransferase activity upon pre- or post- 6-OHDA treatment. KSM-66 also modulated oxidative response proteins: peroxiredoxin-I, VGF and vimentin proteins upon 6-OHDA pre/post treatments. In addition, the extract controlled redox regulation via S-glutathionylation. Pre-treatment of SH-SY5Y cells with KSM-66 decreased protein-glutathionylation levels in the cells treated with 6-OHDA. The rescue of mitochondria with 0.5 mg/ml KSM-66 extract showed an increase in ATP levels. These findings suggest that W. somnifera root extract acts as a neuroprotectant, thereby introducing a potential agent for the treatment or prevention of neurodegenerative diseases. © 2021 The Author(s).

05
CLINICAL STUDY Ayu (2015) PMID: 26730141 ↗
Efficacy of Ashwagandha (Withania somnifera [L.] Dunal) in improving cardiorespiratory endurance in healthy athletic adults.
Clinical Trial Synthesis 2015 Randomized Controlled Trial (RCT) published in Ayu involving n = 24 participants; statistical significance reported at p = 0.0001. Key conclusion: CONCLUSION: The findings suggest that Ashwagandha root extract enhances the cardiorespiratory endurance and improves QOL in healthy athletic adults.
View Original PubMed Abstract ↓

INTRODUCTION: Ashwagandha (Withania somnifera [L.] Dunal) has been traditionally used for various actions ranging from vitalizer, improve endurance and stamina, promote longevity, improve immunity, and male and female fertility. However, clinical studies are needed to prove the clinical efficacy of this herb, especially in cardiovascular endurance and physical performance. AIMS: This prospective, double-blind, randomized, and placebo-controlled study evaluated the efficacy of Ashwagandha roots extract in enhancing cardiorespiratory endurance and improving the quality of life (QOL) in 50 healthy male/female athletic adults. MATERIALS AND METHODS: Cardiorespiratory endurance was assessed by measuring the oxygen consumption at peak physical exertion (VO2 max) levels during a 20 m shuttle run test. The World Health Organization self-reported QOL questionnaire (physical health, psychological health, social relationships, and environmental factors) was used to assess the QOL. Student's t-test was used to compare the differences in a mean and change from baseline VO2 max levels, whereas Wilcoxon signed-rank test was used to assess changes in QOL scores from baseline in the two groups. RESULTS: There was a greater increase from baseline (P < 0.0001) in the mean VO2 max with KSM-66 Ashwagandha (n = 24) compared to placebo (n = 25) at 8 weeks (4.91 and 1.42, respectively) and at 12 weeks (5.67 and 1.86 respectively). The QOL scores for all subdomains significantly improved to a greater extent in the Ashwagandha group at 12 weeks compared to placebo (P < 0.05). CONCLUSION: The findings suggest that Ashwagandha root extract enhances the cardiorespiratory endurance and improves QOL in healthy athletic adults.

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