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Man in Light Blue Comparing Supplement Bottles


Although we're not aware of a clinical study of their combined effects, rhodiola can cause dizziness and ashwagandha can be sedating -- and both may lower blood pressure, so it may be best not to take them together.  

In general, it is best to first use herbal supplements separately to assess the benefits and potential side effects you experience with each.

For more about these herbs, plus reviews and comparisons of the specific products we have tested, see our Review of Rhodiola Supplements and Review of Ashwagandha Supplements.

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