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Home > Anti-aging Research > Ashwaganda (Withania somnifera)

Ashwaganda (Withania somnifera)

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Abstracts:

  • Clinical evaluation of the pharmacological impact of ashwagandha root extract on sleep in healthy volunteers and insomnia patients: A double-blind, randomized, parallel-group, placebo-controlled study - J Ethnopharmacol 2020 Aug 17 - "In both healthy and insomnia subjects, there was a significant improvement in the sleep parameters in the Ashwagandha root extract supplemented group. The improvement was found more significant in insomnia subjects than healthy subjects. Repeat measure Analysis of variance (ANOVA) confirmed the significant improvement in SOL (p 0.013), HAM-A outcomes (p < 0.05), mental alertness (p 0.01), and sleep quality (p < 0.05) of the insomnia patients. A two-way ANOVA was used to confirm the outcomes that denoted sleep onset latency (p < 0.0001) and sleep efficiency (p < 0.0001) as the most improved parameters, followed by TST (p < 0.002) and WASO(p < 0.040). All these parameters (SOL, TST, WASO, TIB, SE, PSQI, HAM-A, Mental Alertness, and Sleep quality) were also statistically assessed for the significant improvement within the group both for the treatment, and the placebo groups in the healthy and the insomnia datasets. Obtained results suggest statistically significant (p < 0.0001) changes between the baseline values and the end of the study results except for the HAM-A and the mental alertness scoresn the healthy subject group." - [Nutra USA] - See ashwagandha at Amazon.com and iHerb.
  • A randomized, double blind, placebo controlled study to evaluate the effects of ashwagandha (Withania somnifera) extract on sleep quality in healthy adults - Sleep Med 2020 Mar 21 - "150 healthy subjects scoring high on non-restorative sleep measures were given 120 mg of standardized ashwagandha extract (Shoden®) once daily for six weeks. Subjects were evaluated using the Restorative Sleep Questionnaire-weekly version and World Health Organization Quality of Life-Bref (WHOQOL) scale ... A total of 144 subjects completed the study, with no dropouts due to adverse events. A 72% increase in self-reported sleep quality was found for the treatment group, compared with 29% in the placebo group (p < 0.001). Based on activity monitoring data, the treatment group showed significant improvement in sleep efficiency (SE) (p < 0.01), total sleep time (p < 0.001) and sleep latency (p < 0.01) and wake after sleep onset (WASO) (p < 0.05) versus placebo after six weeks. In the ashwagandha group quality of life (QOL) scores showed significant improvement in physical (p < 0.001), psychological (p < 0.001), and environment domains" - [Nutra USA]
  • Effects of Ashwagandha (Withania somnifera) on VO2max: A Systematic Review and Meta-Analysis - Nutrients. 2020 Apr 17 - "The purpose of this study was to systematically review the scientific literature about the effects of supplementation with Ashwagandha (Withania somnifera) on maximum oxygen consumption (VO2max), as well as to provide directions for clinical practice ... Results showed a significant enhancement in VO2max in healthy adults and athletes (p = 0.04). The mean difference was 3.00 (95% CI from 0.18 to 5.82) with high heterogeneity. In conclusion, Ashwagandha supplementation might improve the VO2max in athlete and non-athlete people. However, further research is need to confirm this hypothesis since the number of studies is limited and the heterogeneity was high"
  • Efficacy and Tolerability of Ashwagandha Root Extract in the Elderly for Improvement of General Well-being and Sleep: A Prospective, Randomized, Double-blind, Placebo-controlled Study - Cureus. 2020 Feb 23 - "Participants were randomized to receive Ashwagandha root extract at a dose of 600 mg/day (n = 25) orally, or identical placebo capsules with the same dose (n = 25) for 12 weeks. Efficacy was assessed using the WHOQOL-BREF questionnaire, sleep quality, mental alertness on rising, and Physician's Global Assessment of Efficacy to Therapy (PGAET) ... Statistically significant (P<0.0001) improvement was observed in the Ashwagandha treatment group compared to the placebo. The mean (SD) total score of WHOQOL-BREF improved from 140.53 (8.25) at the baseline to 161.84(9.32) at the end of the study. The individual domain scores were also improved. At baseline, the sleep quality and the mental alertness on rising were comparatively low in both the groups. However, upon intervention, a significant increase in the quality of sleep (P<0.0001) and mental alertness (P<0.034) was observed in the Ashwagandha treatment group when compared to the placebo group. Overall improvement was observed for the general wellbeing, sleep quality, and mental alertness in the study population" - [Nutra USA]
  • Efficacy and Safety of Ashwagandha (Withania somnifera) Root Extract in Insomnia and Anxiety: A Double-blind, Randomized, Placebo-controlled Study - Cueus, 28 Sep 19 - "Test product was a capsule containing highest concentration full-spectrum Ashwagandha root extract 300 mg, and the placebo was an identical capsule containing starch ... Sleep actigraphy (Respironics Philips) was used for assessment of sleep onset latency (SOL), total sleep time (TST), sleep efficiency (SE) and wake after sleep onset (WASO) ... The sleep onset latency was improved in both test and placebo at five and 10 weeks. However, the SOL was significantly shorter (p, 0.019) after 10 weeks with test [29.00 (7.14)] compared to placebo [33.94 (7.65)]. Also, significant improvement in SE scores was observed with Ashwagandha which was 75.63 (2.70) for test at the baseline and increased to 83.48 (2.83) after 10 weeks, whereas for placebo the SE scores changed from 75.14 (3.73) at baseline to 79.68 (3.59) after 10 weeks. Similarly, significant improvement in sleep quality was observed with test compared to placebo (p, 0.002). Significant improvement was observed in all other sleep parameters, i.e., SOL, SE, PSQI and anxiety (HAM-A scores) with Ashwagandha root extract treatment for 10 weeks." - [Nutra USA]
    • Sleep onset latency - Wiki - "In sleep science, sleep onset latency (SOL) is the length of time that it takes to accomplish the transition from full wakefulness to sleep"
    • Ashwagandha Dosage: How Much Should You Take per Day? - Healthline - "The medicinal herb appears to help lower levels of cortisol, a hormone produced by your adrenal glands in response to stress. More specifically, daily doses of 125 mg to 5 grams for 1–3 months have shown to lower cortisol levels by 11–32% (2, 3Trusted Source, 4Trusted Source) ... Moreover, 500–600 mg of ashwagandha per day for 6–12 weeks may reduce anxiety and lower the likelihood of insomnia in people with stress and anxiety disorders"
  • Effects of an Aqueous Extract of Withania somnifera on Strength Training Adaptations and Recovery: The STAR Trial - Nutrients. 2018 Nov 20 - "Withania somnifera (Ashwagandha) is an Ayurvedic herb categorized as having "rasayana" (rejuvenator), longevity, and revitalizing properties. Sensoril® is a standardized aqueous extract of the roots and leaves of Withania somnifera ... Gains in 1-RM squat (S500: +19.1 ± 13.0 kg vs. PLA +10.0 ± 6.2 kg, p = 0.009) and bench press (S500: +12.8 ± 8.2 kg vs. PLA: +8.0 ± 6.0 kg, p = 0.048) were significantly greater in S500 ... only the S500 group experienced statistically significant improvements in average squat power, peak bench press power, 7.5 km time trial performance, and perceived recovery scores ... A 500 mg dose of an aqueous extract of Ashwagandha improves upper and lower-body strength, supports a favorable distribution of body mass, and was well tolerated clinically in recreationally active men over a 12-week resistance training and supplementation period" - [Nutra USA]
  • Antioxidant activity and apoptotic induction as mechanisms of action of Withania somnifera (Ashwagandha) against a hepatocellular carcinoma cell line - J Int Med Res. 2018 Jan 1 - "Ashwagandha could be a powerful antioxidant and a promising anticancer agent against HCC"
  • Towards natural mimetics of metformin and rapamycin - Aging (Albany NY). 2017 Nov 15 - "The analysis revealed many novel candidate metformin and rapamycin mimetics, including allantoin and ginsenoside (metformin), epigallocatechin gallate and isoliquiritigenin (rapamycin), and withaferin A (both)" - [Nutra USA] - See ginseng at Amazon.com and ashwagandha at Amazon.com.  See metformin at the Antiaging Store.
    • Withaferin A - wikipedia.org - "Withaferin A is a steroidal lactone, derived from Acnistus arborescens,[1] Withania somnifera[2] (Indian Winter cherry or Ashwagandha in Sanskrit) and other members of Solanaceae family"
  • Efficacy and Safety of Ashwagandha (Withania somnifera (L.) Dunal) Root Extract in Improving Memory and Cognitive Functions - Journal of Dietary Supplements, Feb. 21, 2017 - "After eight weeks of study, the ashwagandha treatment group demonstrated significant improvements compared with the placebo group in both immediate and general memory ... The treatment group also demonstrated significantly greater improvement in executive function, sustained attention, and information-processing speed" - [Nutra USA] - See ashwagandha at Amazon.com.
  • A randomized, double blind placebo controlled study of efficacy and tolerability of Withaina somnifera extracts in knee joint pain - J Ayurveda Integr Med. 2016 Jul - Sep;7(3):151-15 - "Root extracts of Withania somnifera (Ashwagandha) are known to possess analgesic, anti-inflammatory and chondroprotective effects ... Sixty patients with knee joint pain and discomfort were randomized in a double-blind manner to W. somnifera 250 mg, W. somnifera 125 mg and placebo, all given twice daily. Assessment was done by Modified WOMAC, Knee Swelling Index (KSI), Visual Analogue Scale (VAS) at baseline and at the end of 4, 8, 12 weeks ... At the end of 12 weeks, compared to baseline and placebo, significant reductions were observed in mean mWOMAC and KSI in W. somnifera 250 mg (p < 0.001), W. somnifera 125 mg (p < 0.05) groups. VAS scores for pain, stiffness and disability were significantly reduced in W. somnifera 250 mg (p < 0.001), W. somnifera 125 mg (p < 0.01) groups. W. somnifera 250 mg group showed earliest efficacy (at 4 weeks). All treatments were well tolerated" - [Nutra USA]
  • Withania somnifera Root Extract Enhances Telomerase Activity in the Human HeLa Cell Line - Center for Preclinical and Translational Medicine Research, 15 April 2016 - "Ashwagandha root extract powder, at a concentration of 10 µg - 50 µg/ml (Figure 2), increased telomerase activity by ~45%, in the Human HeLa cell line upon 72 hrs exposure (Figure 3), as determined by the TRAP assay" - [Nutra USA]
  • Body Weight Management in Adults Under Chronic Stress Through Treatment With Ashwagandha Root Extract: A Double-Blind, Randomized, Placebo-Controlled Trial - J Evid Based Complementary Altern Med. 2016 Apr 6 - "A total of 52 subjects under chronic stress received either Ashwagandha (300 mg) or placebo twice daily. Primary efficacy measures were Perceived Stress Scale and Food Cravings Questionnaire. Secondary efficacy measures were Oxford Happiness Questionnaire, Three-Factor Eating Questionnaire, serum cortisol, body weight, and body mass index. Each subject was assessed at the start and at 4 and 8 weeks. The treatment with Ashwagandha resulted in significant improvements in primary and secondary measures. Also, the extract was found to be safe and tolerable. The outcome of this study suggests that Ashwagandha root extract can be used for body weight management in adults under chronic stress" - [Nutra USA] - See Ashwagandha at Amazon.com.
  • Efficacy of Ashwagandha (Withania somnifera [L.] Dunal) in improving cardiorespiratory endurance in healthy athletic adults - Ayu. 2015 Jan-Mar;36(1):63-8 - "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" - [Nutra USA] - See ashwagandha at Amazon.com.
  • Efficacy and Safety of Ashwagandha (Withania somnifera) Root Extract in Improving Sexual Function in Women: A Pilot Study - Biomed Res Int. 2015;2015:284154 - "high-concentration ashwagandha root extract (HCARE) ... subjects consumed either HCARE or placebo capsules of 300mg twice daily for 8 weeks ... treatment with HCARE leads to significantly higher improvement, relative to placebo, in the FSFI Total score (p < 0.001), FSFI domain score for "arousal" (p < 0.001), "lubrication" (p < 0.001), "orgasm" (p = 0.004), and "satisfaction" (p < 0.001), and also FSDS score (p < 0.001) and the number of successful sexual encounters (p < 0.001) at the end of the treatment" - [Nutra USA]
  • Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial - J Int Soc Sports Nutr. 2015 Nov 25 - "Withania somnifera (ashwagandha) ... Subjects in the treatment group consumed 300 mg of ashwagandha root extract twice daily, while the control group consumed starch placebos ... Compared to the placebo subjects, the group treated with ashwagandha had significantly greater increases in muscle strength on the bench-press exercise (Placebo: 26.4 kg, 95 % CI, 19.5, 33.3 vs. Ashwagandha: 46.0 kg, 95 % CI 36.6, 55.5; p = 0.001) and the leg-extension exercise (Placebo: 9.8 kg, 95 % CI, 7.2,12.3 vs. Ashwagandha: 14.5 kg, 95 % CI, 10.8,18.2; p = 0.04), and significantly greater muscle size increase at the arms (Placebo: 5.3 cm2, 95 % CI, 3.3,7.2 vs. Ashwagandha: 8.6 cm2, 95 % CI, 6.9,10.8; p = 0.01) and chest (Placebo: 1.4 cm, 95 % CI, 0.8, 2.0 vs. Ashwagandha: 3.3 cm, 95 % CI, 2.6, 4.1; p < 0.001). Compared to the placebo subjects, the subjects receiving ashwagandha also had significantly greater reduction of exercise-induced muscle damage as indicated by the stabilization of serum creatine kinase (Placebo: 1307.5 U/L, 95 % CI, 1202.8, 1412.1, vs. Ashwagandha: 1462.6 U/L, 95 % CI, 1366.2, 1559.1; p = 0.03), significantly greater increase in testosterone level (Placebo: 18.0 ng/dL, 95 % CI, -15.8, 51.8 vs. Ashwagandha: 96.2 ng/dL, 95 % CI, 54.7, 137.5; p = 0.004), and a significantly greater decrease in body fat percentage (Placebo: 1.5 %, 95 % CI, 0.4 %, 2.6 % vs. Ashwagandha: 3.5 %, 95 % CI, 2.0 %, 4.9 %; p = 0.03)" - [Nutra USA]
  • An Alternative Treatment for Anxiety: A Systematic Review of Human Trial Results Reported for the Ayurvedic Herb Ashwagandha (Withania somnifera) - J Altern Complement Med. 2014 Nov 18 - "Withania somnifera (WS; common name, ashwagandha) ... All five studies concluded that WS intervention resulted in greater score improvements (significantly in most cases) than placebo in outcomes on anxiety or stress scales. Current evidence should be received with caution because of an assortment of study methods and cases of potential bias"
  • Adaptogenic and cardioprotective action of ashwagandha in rats and frogs - J Ethnopharmacol. 2000 Apr;70(1):57-63 - "it was concluded that ashwagandha possesses adaptogenic, cardiotropic, cardioprotective and anticoagulant properties"