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Efficacy and Safety of Ashwagandha Root Extract on Cognitive Functions in Healthy, Stressed Adults: A Randomized, Double-Blind, Placebo-Controlled Study.
Evid Based Complement Alternat Med. 2021; 2021:8254344.EB

Abstract

BACKGROUND

The global prevalence of stress is increasing. Stress adversely affects cognitive ability, sleep quality, and overall psychological well-being. Ashwagandha (Withania somnifera (L.) Dunal), an essential medicine in Ayurveda, is reportedly beneficial in reducing stress and improving memory. This double-blind, randomized, placebo-controlled clinical study evaluated the effect of Ashwagandha root extract sustained-release capsule 300 mg (Prolanza™; hereafter Ashwagandha SR) on cognitive functions, stress levels, sleep quality, overall well-being, and safety in stressed subjects.

METHODS

Subjects (130 healthy cognitively sound adults [20-55 years, body mass index:18-29 kg/m2]) having a Perceived Stress Scale (PSS) score of 14-24 were randomized to receive either Ashwagandha SR or placebo. Subjects took one capsule of Ashwagandha SR or placebo daily for 90 consecutive days. This study was registered on Clinical Trials Registry-India (CTRI) on 13/11/2019 [number: CTRI/2019/11/021990]. The primary endpoint was the change in cognitive function as measured by CANTAB from baseline to the end of the study period (90 ± 7 days). The secondary outcomes included the change in PSS-10 score, serum cortisol level (9-11 am), the OHQ score, the PSQI, and serum BDNF levels.

RESULTS

Only 125 completed the study and were evaluated. The Cambridge Neuropsychological Test Automated Battery (CANTAB) reported significantly improved recall memory, and the total error rate in recalling patterns significantly decreased at visit 4 in the Ashwagandha SR group vs. the placebo group (first attempt memory score:12.9 ± 6.7 vs. 10.1 ± 6.3; total errors:17.5 ± 23.3 vs. 27.7 ± 23.6). At visit 4, lower PSS-10 score (13.0 ± 5.0 vs. 18.7 ± 4.6; p < .0001), serum cortisol levels (p=0.0443), and Pittsburgh Sleep Quality Index (PSQI) score (p < .0001) but higher Oxford Happiness Questionnaire (OHQ) scores (p < .0001) were seen in Ashwagandha SR vs. the placebo group, suggesting significantly lower stress levels and significantly better psychological well-being and sleep quality in the former. No adverse events were reported.

CONCLUSIONS

This is the first clinical study assessing Ashwagandha SR for its safety and efficacy. Treatment with one Ashwagandha SR capsule once daily for 90 days improved memory and focus, psychological well-being, and sleep quality, reduced stress levels, and was safe and well-tolerated.

Authors+Show Affiliations

Bengaluru Neuro Centre, Bengaluru, Karnataka 560003, India.Inventia Healthcare Ltd., Mumbai, Maharashtra 400069, India.Laila Nutraceuticals, Vijayawada, Andhra Pradesh 520007, India.Sumana Vinayaka Nursing Home, Mandya, Karnataka 571401, India.In Vitro Research Solutions (iVRS) Pvt Ltd., Bengaluru, Karnataka 560092, India.In Vitro Research Solutions (iVRS) Pvt Ltd., Bengaluru, Karnataka 560092, India.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

34858513

Citation

Gopukumar, Kumarpillai, et al. "Efficacy and Safety of Ashwagandha Root Extract On Cognitive Functions in Healthy, Stressed Adults: a Randomized, Double-Blind, Placebo-Controlled Study." Evidence-based Complementary and Alternative Medicine : ECAM, vol. 2021, 2021, p. 8254344.
Gopukumar K, Thanawala S, Somepalli V, et al. Efficacy and Safety of Ashwagandha Root Extract on Cognitive Functions in Healthy, Stressed Adults: A Randomized, Double-Blind, Placebo-Controlled Study. Evid Based Complement Alternat Med. 2021;2021:8254344.
Gopukumar, K., Thanawala, S., Somepalli, V., Rao, T. S. S., Thamatam, V. B., & Chauhan, S. (2021). Efficacy and Safety of Ashwagandha Root Extract on Cognitive Functions in Healthy, Stressed Adults: A Randomized, Double-Blind, Placebo-Controlled Study. Evidence-based Complementary and Alternative Medicine : ECAM, 2021, 8254344. https://doi.org/10.1155/2021/8254344
Gopukumar K, et al. Efficacy and Safety of Ashwagandha Root Extract On Cognitive Functions in Healthy, Stressed Adults: a Randomized, Double-Blind, Placebo-Controlled Study. Evid Based Complement Alternat Med. 2021;2021:8254344. PubMed PMID: 34858513.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Efficacy and Safety of Ashwagandha Root Extract on Cognitive Functions in Healthy, Stressed Adults: A Randomized, Double-Blind, Placebo-Controlled Study. AU - Gopukumar,Kumarpillai, AU - Thanawala,Shefali, AU - Somepalli,Venkateswarlu, AU - Rao,T S Sathyanaryana, AU - Thamatam,Vijaya Bhaskar, AU - Chauhan,Sanjaya, Y1 - 2021/11/30/ PY - 2021/05/28/received PY - 2021/11/11/accepted PY - 2021/12/3/entrez PY - 2021/12/4/pubmed PY - 2021/12/4/medline SP - 8254344 EP - 8254344 JF - Evidence-based complementary and alternative medicine : eCAM JO - Evid Based Complement Alternat Med VL - 2021 N2 - BACKGROUND: The global prevalence of stress is increasing. Stress adversely affects cognitive ability, sleep quality, and overall psychological well-being. Ashwagandha (Withania somnifera (L.) Dunal), an essential medicine in Ayurveda, is reportedly beneficial in reducing stress and improving memory. This double-blind, randomized, placebo-controlled clinical study evaluated the effect of Ashwagandha root extract sustained-release capsule 300 mg (Prolanza™; hereafter Ashwagandha SR) on cognitive functions, stress levels, sleep quality, overall well-being, and safety in stressed subjects. METHODS: Subjects (130 healthy cognitively sound adults [20-55 years, body mass index:18-29 kg/m2]) having a Perceived Stress Scale (PSS) score of 14-24 were randomized to receive either Ashwagandha SR or placebo. Subjects took one capsule of Ashwagandha SR or placebo daily for 90 consecutive days. This study was registered on Clinical Trials Registry-India (CTRI) on 13/11/2019 [number: CTRI/2019/11/021990]. The primary endpoint was the change in cognitive function as measured by CANTAB from baseline to the end of the study period (90 ± 7 days). The secondary outcomes included the change in PSS-10 score, serum cortisol level (9-11 am), the OHQ score, the PSQI, and serum BDNF levels. RESULTS: Only 125 completed the study and were evaluated. The Cambridge Neuropsychological Test Automated Battery (CANTAB) reported significantly improved recall memory, and the total error rate in recalling patterns significantly decreased at visit 4 in the Ashwagandha SR group vs. the placebo group (first attempt memory score:12.9 ± 6.7 vs. 10.1 ± 6.3; total errors:17.5 ± 23.3 vs. 27.7 ± 23.6). At visit 4, lower PSS-10 score (13.0 ± 5.0 vs. 18.7 ± 4.6; p < .0001), serum cortisol levels (p=0.0443), and Pittsburgh Sleep Quality Index (PSQI) score (p < .0001) but higher Oxford Happiness Questionnaire (OHQ) scores (p < .0001) were seen in Ashwagandha SR vs. the placebo group, suggesting significantly lower stress levels and significantly better psychological well-being and sleep quality in the former. No adverse events were reported. CONCLUSIONS: This is the first clinical study assessing Ashwagandha SR for its safety and efficacy. Treatment with one Ashwagandha SR capsule once daily for 90 days improved memory and focus, psychological well-being, and sleep quality, reduced stress levels, and was safe and well-tolerated. SN - 1741-427X UR - https://www.unboundmedicine.com/medline/citation/34858513/Efficacy_and_Safety_of_Ashwagandha_Root_Extract_on_Cognitive_Functions_in_Healthy_Stressed_Adults:_A_Randomized_Double_Blind_Placebo_Controlled_Study_ L2 - https://doi.org/10.1155/2021/8254344 DB - PRIME DP - Unbound Medicine ER -
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