Does Ashwagandha Lower Blood Pressure? What the Evidence Actually Shows
Short answer: possibly, modestly, and indirectly, mostly by lowering stress rather than acting on your arteries directly. Ashwagandha is not a proven blood pressure medication, and anyone selling it as one is overstating the evidence. Here is the honest picture.
How Ashwagandha Could Affect Blood Pressure
Ashwagandha (Withania somnifera) is an adaptogen. Its best-documented effect is reducing the body's stress response and lowering cortisol, the stress hormone. Chronic stress and high cortisol are a well-established driver of elevated blood pressure. So the plausible mechanism is indirect: calm the stress axis, and stress-driven blood pressure may ease with it. That is different from a drug that relaxes blood vessels directly.
What the Research Actually Says
The strongest human evidence is for stress and cortisol, not for blood pressure directly. In a randomized, double-blind, placebo-controlled trial, a standardized ashwagandha root extract significantly reduced serum cortisol, the body's main stress hormone, compared with placebo.[1] Two further placebo-controlled trials found the same pattern: lower cortisol and lower perceived-stress scores.[2][3]
Trials that look at blood pressure as a main outcome, by contrast, are small and few, and any reductions reported are modest. So the honest position is this: there is good evidence ashwagandha lowers stress, and only limited, indirect evidence that this translates into meaningfully lower blood pressure. Treat it as supportive, not as a substitute for a proven approach.
Where It Fits, and Where It Doesn't
If your blood pressure runs high mainly when you are wound up, sleeping badly, and running on stress, the stress-lowering angle is where ashwagandha is most reasonable. If your hypertension is driven by weight, salt, kidney issues, or is already in a higher stage, ashwagandha is not the tool that fixes it, and delaying real treatment to rely on it is a mistake.
This is exactly why ashwagandha appears as one ingredient inside a combined formula rather than on its own. In Ivy's Mukta Vati, ashwagandha (listed as Winter Cherry root) is the stress-axis herb, working alongside Arjuna, a bark with a long record of study in cardiovascular care,[4] and other herbs for circulation and heat.
Before You Try It
If you already take blood pressure medication, adding ashwagandha could in theory push your numbers lower than intended, so read whether you can take ashwagandha with blood pressure medication and talk to your doctor first. Ashwagandha has been shown to raise thyroid hormone levels, so anyone with a thyroid condition should have their levels monitored.[5] It is generally avoided in pregnancy and hyperthyroidism, and can interact with thyroid, sedative, and immunosuppressant drugs. Rare cases of ashwagandha-linked liver injury have been reported, so stop it and see a doctor if you develop unusual fatigue, dark urine, or yellowing of the skin or eyes.[6]
FAQs
How much does ashwagandha lower blood pressure?
There is no reliable set figure. Any effect reported in studies is modest and indirect, tied mostly to reduced stress rather than a direct drop in your numbers. Track your own readings rather than assuming a fixed amount.
How long does it take to work?
Stress and sleep effects are often noticed within a couple of weeks. Any blood pressure change is slower and should be measured, not assumed. See is ashwagandha safe if you have high blood pressure for more.
Can ashwagandha replace my blood pressure medication?
No. It is not a proven antihypertensive and should never replace prescribed medication. Do not stop your medication to try it.
Does ashwagandha ever raise blood pressure instead?
For most people it does not, but there is some confusion worth understanding. See does ashwagandha raise blood pressure.
References
- Chandrasekhar K, Kapoor J, Anishetty S. 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. Indian J Psychol Med. 2012. PubMed
- Salve J, Pate S, Debnath K, Langade D. Adaptogenic and anxiolytic effects of ashwagandha root extract in healthy adults: a double-blind, randomized, placebo-controlled clinical study. Cureus. 2019. PMC
- Lopresti AL, Smith SJ, Malvi H, Kodgule R. An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extract: a randomized, double-blind, placebo-controlled study. Medicine (Baltimore). 2019. PubMed
- Dwivedi S, Chopra D. Revisiting Terminalia arjuna – an ancient cardiovascular drug. J Ayurveda Integr Med. 2014. PubMed
- Gannon JM, Forrest PE, Roy Chengappa KN. Subtle changes in thyroid indices during a placebo-controlled study of an extract of Withania somnifera in persons with bipolar disorder. J Ayurveda Integr Med. 2014. PMC
- Ashwagandha (Withania somnifera)-associated liver injury: a scoping review of clinical characteristics and safety considerations. 2024. PubMed
This post is for educational purposes only and shares traditional Ayurvedic understanding. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified doctor or Ayurvedic practitioner before starting any new herb, supplement, or lifestyle change, especially if you are pregnant, nursing, or managing an existing condition. Read our full medical disclaimer.