Research review
Ashwagandha or dandelion root: what the research shows
Ashwagandha and dandelion root are sometimes searched as alternatives, but they're studied for entirely different things: ashwagandha for stress and cortisol, dandelion root for traditional digestive and diuretic use with far less human testing behind it. No trial has compared them.
The evidence doesn't support ashwagandha and dandelion root as interchangeable — they're studied for different things entirely. Ashwagandha's research is mostly about stress and cortisol; dandelion root's is mostly traditional and still unconfirmed in controlled human trials for nearly everything it's used for.
What the evidence doesn't support
It doesn't support choosing one over the other for the same purpose, since they aren't studied for the same purpose. It doesn't support ashwagandha or dandelion root as a treatment for a diagnosed stress-related or digestive condition. And it doesn't support dandelion root as having anything close to ashwagandha's level of human trial evidence — most of what's published on dandelion root is traditional use, lab work or animal research, not controlled trials in people.
What the trials found
Ashwagandha's evidence is the more developed of the two. A 2012 randomized, placebo-controlled trial gave 64 adults with a history of chronic stress 600 mg/day of a concentrated ashwagandha root extract for 60 days and found significantly lower stress-scale scores and cortisol than placebo. A 2024 meta-analysis pooling 9 trials, 558 people total, found ashwagandha outperformed placebo on the Perceived Stress Scale, the Hamilton Anxiety Scale, and cortisol, though doses varied across the pooled trials rather than converging on one number.
Dandelion root's evidence looks very different. The one controlled human trial of dandelion as a diuretic tested a liquid leaf extract — not root — giving 17 healthy adults 8 mL three times over a single day; urination frequency rose after the first two doses, with no further change after the third. A 2006 review of dandelion's pharmacology catalogued a long list of effects studied for the plant — diuretic, choleretic, anti-inflammatory, antioxidative and prebiotic activity among them — but the authors were explicit that these come mostly from lab and animal work, and that human-level testing of dandelion's traditional digestive and liver uses remains unfinished research.
No trial has tested ashwagandha and dandelion root against each other, or measured whether one works better than the other for stress, digestion, or anything else. They simply haven't been compared.
| Herb | Best evidence | Population | What it's actually studied for |
|---|---|---|---|
| Ashwagandha | Meta-analysis of 9 RCTs (558 people), significant effect on stress-scale scores and cortisol | Adults with chronic stress | Stress, cortisol, anxiety-scale scores |
| Dandelion root | One small pilot trial — and that trial used leaf, not root | 17 healthy adults, one-day study | Urination frequency (leaf extract only) |
Questions people ask
Is ashwagandha better than dandelion root?
They're not answering the same question, so "better" doesn't really apply. Ashwagandha has a meaningfully larger and more consistent human trial base, specifically for stress; dandelion root's evidence is thinner and mostly traditional, for a different set of claimed uses. Comparing them head-to-head assumes they compete for the same effect, and the research doesn't support that assumption.
Can you take ashwagandha and dandelion root together?
No trial has tested that combination. Each has its own separate safety profile — see who should not take dandelion root — so mentioning both to a doctor or pharmacist, especially alongside any medication, is worth doing rather than assuming two different herbal categories are automatically fine stacked together.
Which one is better for stress or the adrenal glands?
Ashwagandha is the one with stress-specific research behind it; dandelion root's research doesn't test stress or adrenal function at all. That's a description of what's been studied, not a recommendation to use either instead of medical care for a stress-related condition.
When to talk to a doctor
Stress that interferes with daily life, sleep or work, or a digestive symptom that persists, is worth raising with a doctor. Neither ashwagandha nor dandelion root is a treatment for a diagnosed stress-related or digestive condition, and nothing in the research above supports using either as a substitute for evaluation or care a doctor might recommend. Ashwagandha should be discussed with a doctor if you're pregnant or nursing, have a thyroid condition, or take other medication; dandelion root carries its own separate cautions — see who should not take dandelion root.
Related reading: dandelion root: what the research does and doesn't show, dandelion root benefits, and dandelion root and medications.
Sources
- Taraxacum--a review on its phytochemical and pharmacological profile A 2006 review catalogued what's been studied about dandelion's pharmacology — mostly in the lab and in animals — and noted its traditional digestive and liver use rests on generations of use, not clinical trials.
- The diuretic effect in human subjects of an extract of Taraxacum officinale folium over a single day In the only human trial of dandelion as a diuretic, a liquid leaf extract (not root) increased how often 17 healthy adults urinated after the first two of three doses given in a single day.
- 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 In a 60-day trial, 600 mg/day of a concentrated ashwagandha extract lowered stress-scale scores and cortisol more than placebo in adults with chronic stress.
- Effects of Ashwagandha (Withania Somnifera) on stress and anxiety: A systematic review and meta-analysis Pooling 9 trials in 558 people, ashwagandha lowered perceived stress, anxiety-scale scores and cortisol more than placebo.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.