Ashwagandha may help reduce anxiety, improve physical and cognitive performance, and have other benefits according to preliminary studies -- but our tests revealed a good ashwagandha supplement is hard to find!
Only 56% of the ashwagandha supplements we selected for review passed all of our tests of quality. And even some of those that contained high-quality ashwagandha provided only a small dose. Our tests were based on amounts of withanolides -- key compounds that naturally occur in ashwagandha and are associated with its effects. In fact, amounts of withanolides in a suggested daily serving ranged from just 0.57 mg to as much as 95.3 mg!
Fortunately, we also identified several products that passed all of our tests of quality and provides doses of withanolides consistent with efficacy in clinical studies. Among these, we selected as our Top Pick
an ashwagandha supplement that offers superior quality and strength at relatively low cost.
You must be a ConsumerLab.com member to get the full ashwagandha test results and reviews for 15 supplements including extracts, root powders, and combination products. Nine of these were selected for review by ConsumerLab.com and six others passed the same testing in CL's voluntary Quality Certification Program. In the review, you'll learn:
- ConsumerLab's Top Pick for ashwagandha based on quality, purity, dose, and value
- Which products passed or failed our tests and why
- How ashwagandha supplements compare on ingredients, dosage, amounts of withanolides, and cost
- Ashwagandha dosage for specific uses, such as reducing anxiety and improving memory
- The amount of withanolides in each ashwagandha supplement and dosage to look for
- How ashwagandha root powders and root extracts differ, and what they have been shown to do
- Clinical information about whether ashwagandha works for anxiety and improving memory
- Price comparisons showing how to get the best ashwagandha at lowest cost
- Safety, side effects, and potential drug interactions with ashwagandha