The Science of Ashwagandha.
Evidence You Can Trust.
47 peer-reviewed studies. 12 comprehensive guides. One definitive source.
Ashwagandha is very potent at reducing cortisol... It really does work, and for many people, it works quite well.
Dr. Andrew Huberman, Ph.D.
Professor of Neurobiology, Stanford University School of Medicine
Huberman Lab Podcast
The Complete Guide to Ashwagandha
Everything you need to know about ashwagandha: its history, benefits, science, safety, and practical uses. This comprehensive hub page covers all major topics with citations to peer-reviewed research.
Explore Our Evidence-Based Guides
What is Ashwagandha?
Complete overview of ashwagandha: history, benefits, science, and uses. Start here for a comprehensive introduction.
Stress & Anxiety Relief
Learn about ashwagandha's powerful adaptogenic effects on stress, anxiety, and cortisol levels.
Sleep & Relaxation
Learn how ashwagandha improves sleep quality, reduces insomnia, and promotes relaxation.
Hormonal Balance
Explore ashwagandha's effects on testosterone, fertility, thyroid, and women's health.
Cognition & Performance
Discover how ashwagandha enhances cognitive function, energy, and physical performance.
General Health Benefits
Discover how ashwagandha supports overall wellness, weight management, and hair health.
Safety & Side Effects
Understand safety considerations, potential side effects, and who should avoid ashwagandha.
With Other Supplements
Learn about combining ashwagandha with L-Theanine, Magnesium, Melatonin, and more.
Vs. Other Adaptogens
Compare ashwagandha with Rhodiola, Ginseng, Maca, and other popular adaptogens.
Forms & Products
Explore different forms: root extract, KSM-66, Sensoril, gummies, and more.
Dosage Guide
Find the right dosage, timing, and form for your specific health goals.
The Science
Understand the science behind ashwagandha and its active compounds: withanolides.
Every Claim Backed by Science
We cite peer-reviewed research for every health claim. Here are three landmark studies that demonstrate ashwagandha's effectiveness.
A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of ashwagandha root in reducing stress and anxiety in adults
Chandrasekhar K, Kapoor J, Anishetty S • Indian J Psychol Med • 2012
27.9% reduction in serum cortisol levels in the ashwagandha group compared to placebo.
Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial
Wankhede S, Langade D, Joshi K, et al. • J Int Soc Sports Nutr • 2015
Significant increases in muscle strength and testosterone levels in healthy young men.
A randomized, double blind, placebo controlled study to evaluate the effects of ashwagandha extract on sleep quality in healthy adults
Deshpande A, Irani N, Balkrishnan R, Benny IR • Sleep Med • 2020
72% improvement in sleep quality scores in the ashwagandha group.
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