Ashwagandha for Anxiety: What It Can and Can't Do

"As a woman who has struggled with anxiety and high cortisol levels from trying to juggle way too much." A Her Majesty member started a five-star review that way in September, and chances are some of it sounds familiar. Work, family, aging parents, a mind that won't switch off at 10 p.m. Stress takes a toll on physical and mental health, and when you're running on fumes, you reach for stress relief wherever it's offered. It's no surprise that ashwagandha, an herbal supplement sold as an adaptogen, ends up in so many carts, right next to a dozen other herbal remedies promising calm.

So here's the straight version. We'll walk through what the research on ashwagandha for anxiety supports, which doses and extracts were actually studied, how long it takes, who should skip it, and whether the rumor that ashwagandha causes weight gain or belly fat holds up. Where the evidence is thin, we'll say so, and that includes how our own product stacks up against the trials. Think of it as medical research translated for a woman with a full calendar and a healthy skepticism of wellness hype.

What is ashwagandha, and how might it relieve stress?

Ashwagandha is an adaptogen, a plant compound thought to help the body handle stress. Researchers think its withanolides may act on the body's stress response, including the hypothalamic-pituitary-adrenal axis that controls cortisol. How it works isn't proven, and its effects on the nervous system are still being studied.

Harvard Health describes adaptogens as compounds that appear to turn the body's stress response pathways up or down, and says withanolides seem to affect pathways involved in inflammation and in the conversation between the nervous system and the hormone system. The NIH adds that withanolides have been associated with anti-inflammatory effects and antioxidant effects, mostly in lab research. Some lab research also suggests ashwagandha acts on GABA receptors in the brain, the same signaling system that calming medicines target, but that hasn't been shown to explain what happens in people. It's a tidy story for stress relief and stress management, and it fits modern research on how chronic stress affects the body. Tidy isn't proven, though. Ashwagandha's pharmacological actions in humans are still being mapped, so we care more about what happened to people in trials than what happened in a lab dish.

Chronic stress and chronic anxiety tend to go together with high cortisol, which is why the stress hormone cortisol is the usual yardstick in these trials. Products and studies commonly land between 300 and 600 mg a day, which is the range you'll see quoted most.

Ever notice how one herb gets credited with everything from better sleep to better skin? This is part of why. A broad mechanism lets a supplement sound like it does everything. The honest answer is narrower, and it starts with what's been measured in people.

Does ashwagandha really work for anxiety?

Possibly, for mild symptoms. A 2024 meta-analysis of nine randomized trials found Withania somnifera lowered anxiety scores more than placebo, but the trials were small and varied. The NIH says evidence on anxiety is unclear. Ashwagandha is best seen as a possible helper for stress, not a treatment for anxiety disorders.

Real enough to study, modest enough to keep in perspective: that's the short version of its health benefits.

Ashwagandha (Withania somnifera, sometimes called Indian ginseng) is a shrub whose root has been used for thousands of years in Ayurvedic medicine, the traditional system of medicine from India, where it's known as an Ayurvedic herb. Most of today's ashwagandha supplements use an ashwagandha root extract standardized for withanolides, the compounds thought to do the work. You'll also see ashwagandha powder, ashwagandha capsules, and extracts made from other parts of the ashwagandha plant, and they're not interchangeable. Here's what the better evidence shows, starting with the cleanest kind of clinical trials: the double-blind, placebo-controlled kind, where neither participants nor researchers know who got the real thing.

A 2024 systematic review and meta-analysis pooled nine randomized controlled trials with 558 people. Compared with placebo, ashwagandha formulations were linked to lower scores on the Perceived Stress Scale (mean difference of 4.72 points), the Hamilton Anxiety Scale (2.19 points), and serum cortisol, the stress hormone cortisol that your body releases when it's on high alert. Four of the nine studies reported mild to moderate side effects. That systematic review is one of the better summaries we have, but it's still nine small trials.

A 2025 meta-analysis in BJPsych Open looked at 14 trials, with 360 people taking Withania somnifera and 353 controls, in people with mental health conditions, mostly anxiety disorders. It found improvements in anxiety, stress, and sleep quality, with a median dose of 600 mg a day and a median follow-up of eight weeks. The authors flagged small numbers, big differences between studies, and outlier effects. So a significant improvement on paper comes with an asterisk.

Why the NIH is still cautious

The National Center for Complementary and Integrative Health says some ashwagandha preparations may be effective for insomnia and stress, but that evidence about anxiety is unclear, partly because many trials had small sample sizes and used different preparations. Harvard Health's review of ashwagandha lands in a similar place: some research suggests it might help reduce feelings of stress and anxiety, and not every claim is backed by evidence.

One more thing worth knowing. Several of the trials below used extract supplied by the company that makes it. That doesn't make the results wrong. It does mean independent, larger trials would be welcome.

What does the research say about 300 mg of KSM-66 ashwagandha?

Trials of KSM-66, a root extract, used 250 to 600 mg a day, mostly for about eight weeks. Stress scores and cortisol dropped at both ends of that range, but in the one trial that compared doses, anxiety scores improved only at 600 mg a day. A 300 mg scoop sits near the low end.

KSM-66 is an ashwagandha extract made only from the ashwagandha root, with no leaf. Each study compared the extract against a look-alike capsule, and the placebo group results are why the changes can be taken more seriously than a before-and-after survey.

Withania somnifera trials are tricky to compare, because the extract, the dose, and the people studied all change from paper to paper. Here are the trials behind that statement. All three used KSM-66 supplied by its maker.

• A 60-day, double-blind, placebo-controlled study in 64 adults with chronic stress gave 300 mg twice a day (600 mg total). Published in the Indian Journal of Psychological Medicine, it found stress scores fell significantly versus the placebo group, and serum cortisol was lower, with mild side effects that were comparable in both groups.
• An eight-week, randomized, double-blind, placebo-controlled trial in 60 stressed adults tested 125 mg or 300 mg twice a day against placebo, which works out to 250 or 600 mg a day. Perceived stress and cortisol improved at both doses, and sleep quality improved. But the Hamilton Anxiety score was significantly better than placebo only in the 600 mg group.
• An eight-week placebo-controlled trial in 52 adults under chronic stress, framed around body weight management, used 300 mg twice a day and found lower stress, fewer food cravings, and lower cortisol versus placebo. Perceived stress scores in the ashwagandha group fell from about 20.3 to 13.7 over the eight weeks, a drop of 32.7 percent, versus about 2 points in the placebo group. The treated group also scored higher on the Oxford Happiness Questionnaire, a positive outlook measure, though self-reported scores like that are easy to nudge.

Look at how those participants were described. These were stressed, otherwise healthy adults, not people diagnosed with an anxiety disorder, so the results speak to chronic stress symptoms and stress levels more than to clinical anxiety. Even the healthy young adults in some ashwagandha studies were selected because they reported feeling stressed, which tells you how the trials were designed to look for stress-relieving effects. A different ashwagandha root extract, Shoden at 240 mg once a day, produced a significant drop in Hamilton Anxiety scores versus placebo over 60 days in 60 stressed adults in a placebo-controlled clinical study. That's a once-daily dose in the same neighborhood as a 300 mg scoop. Different product, though, so it can't stand in for KSM-66.

So where does Queen's Blend fit?

Each scoop of Queen's Blend contains 300 mg of KSM-66 ashwagandha, along with 3 g of creatine monohydrate, 15 mg of saffron extract, and 2.1 g of FiberSmart, a tapioca fiber. It's one scoop a day, no stimulants, zero sugar. We use an extract with published clinical trials behind it, at a dose within the studied range.

We'd be misleading you, though, if we implied one scoop recreates a 600 mg trial. The honest summary: KSM-66 is an extract with clinical research behind it, our dose is at the modest end of what was studied, and the evidence is strongest for stress and sleep, not for treating anxiety. If you've been told by a clinician to take a higher amount, follow their advice and ask how a blend fits.

How long does ashwagandha take to work for anxiety?

Expect weeks, not days. The trials above ran 8 to 9 weeks, and the typical follow-up in the 2025 meta-analysis was eight weeks. In the dose comparison study, changes were larger at week eight than week four. Give it about two months of daily use before you decide whether it's helping.

Some people feel a little calmer sooner, and some feel nothing. Harvard Health notes that ashwagandha may not work for everyone, and that a few people report feeling more stimulated or anxious instead of calmer. If that's you, stop and talk to your clinician.

A practical way to judge it: pick one measure before you start, such as how often you wake at 3 a.m., how tight your shoulders feel by 4 p.m., or a simple 1 to 10 stress rating each evening. Track it for two weeks, then check again at four and eight weeks. That beats guessing.

What are the side effects of ashwagandha for women?

Most people tolerate ashwagandha, and side effects are usually mild: drowsiness, stomach upset, loose stools, nausea, or headache. The NIH notes that rare cases of liver injury have been linked to ashwagandha supplements. Stop and call your doctor if you notice yellowing of the skin or eyes, dark urine, or severe fatigue.

So, is ashwagandha safe? For most healthy adults in the short term, it appears to be.

A 2026 systematic review of 23 trials with 2,317 healthy adults, using standardized root extracts at 125 to 600 mg a day for up to 180 days, found liver, kidney, blood, hormone, and heart markers stayed within normal ranges and no serious adverse events were attributed to the extract. Mild effects like stomach discomfort, headache, and drowsiness were infrequent and showed up in placebo groups too. Some of that review's authors consult for supplement companies, and the authors noted that data beyond 180 days are limited.

Because dietary supplements aren't approved by the FDA before they're sold, the product matters. Ashwagandha supplements vary widely, from standardized extracts to plain ashwagandha powder, and the label may not tell you how much withanolide you're getting. Harvard Health and Cleveland Clinic both advise choosing ashwagandha supplements verified by an outside group such as USP, NSF International, or ConsumerLab. That review adds that case reports raising safety concerns have mostly involved non-standardized or multi-ingredient products, which is another reason to read labels carefully when you shop for herbal supplements.

Who should not take ashwagandha?

Skip it, or ask your doctor first, if you're pregnant or breastfeeding, have a thyroid condition, have an autoimmune disease, or are about to have surgery. It can also interact with medicines for diabetes, high blood pressure, sleep, anxiety, seizures, and thyroid disease, and with drugs that suppress the immune system.

That list comes from the NIH, and Harvard Health and Cleveland Clinic give similar warnings. Cleveland Clinic adds that ashwagandha can increase thyroid activity and may contribute to uterine contractions, and that Denmark has banned it.

The thyroid point deserves a closer look, because many women over 40 have thyroid questions. In one eight-week trial of 50 people with subclinical hypothyroidism, 600 mg a day improved thyroid markers, raising T3 and T4 and lowering TSH compared with placebo. That sounds helpful on paper, but it shows ashwagandha acts on thyroid hormones, which is a good reason to talk to your doctor if you take thyroid medication or have unexplained weight, heart rate, or energy changes.

Anxiety medicines and sedatives are another thing to raise with your pharmacist. Ashwagandha can add to drowsiness, and it's not a swap for a prescription. Never stop a prescribed medicine to try a supplement, and don't combine ashwagandha with other herbal supplements or herbal remedies for sleep or mood without checking first, since the combined effects haven't been studied. Take ashwagandha at the same time each day so you can tell what it's doing. If you take ashwagandha in the morning and feel wired, move it to the evening, and if you take ashwagandha at night and feel groggy, move it back.

Does ashwagandha cause weight gain or belly fat?

There's no good evidence that it does. A 2026 meta-analysis of 20 randomized trials with 1,249 adults found no significant effect of ashwagandha on body weight or body fat percentage. In one eight-week trial of stressed adults, the ashwagandha group lost more weight than placebo, but ashwagandha isn't a weight loss product.

Here's the nuance. That trial tracked food cravings and weight as well as stress. In that eight-week trial of 52 stressed adults, people taking 300 mg of KSM-66 twice daily lost an average of 2.32 kg, versus 1.13 kg on placebo. Both groups lost weight, and the difference in actual body weight at week eight wasn't statistically significant, so treat it as a hint, not a promise. The 2026 meta-analysis covering ashwagandha and body weight found no significant change.

So why does the "ashwagandha belly fat" question keep coming up, and what about general weight management? Probably because stress and weight are tangled together. Johns Hopkins Medicine explains that cortisol doesn't directly cause weight gain, but ongoing high levels can increase appetite, promote belly fat storage, and contribute to muscle loss. If a stressful season is when your waistline changed, ashwagandha may simply have been taken at the same time.

For weight management, the useful levers are the boring ones. Women over 40 also go through metabolic changes around perimenopause that can shift where weight settles, and that timing can overlap with starting a supplement. If you gain weight after starting any supplement, look at the usual suspects first: sleep, stress eating, less movement, and changes in medication. Because ashwagandha can affect thyroid hormones, unexplained weight changes are worth a conversation with your doctor.

What else has ashwagandha been studied for?

Beyond stress, ashwagandha has been studied for sleep, physical performance, and, in two small trials, female sexual function. The sleep and performance findings are modest. The sexual function trials were small, short, and run by the same research circle, so they're interesting, not settled.

Sleep and better sleep. The 2025 meta-analysis above found improved sleep quality, and the dose comparison trial found better sleep quality scores too. The NIH says some ashwagandha preparations may be effective for insomnia, which is one of the sleep disorders people most often hope it will help. To improve sleep quality, give any herbal medicine a few weeks and track how you feel. Still, if restful sleep is your goal, treat it as one input next to your evening routine, not a sedative.

Physical performance and muscle strength. A 2026 meta-analysis found ashwagandha was linked to gains in muscle strength in physically active people, but not in untrained participants, with no meaningful change in body weight or body fat. Strength gains were seen in people who were already training, so ashwagandha isn't a stand-in for lifting or cardio.

Female sexual function. An eight-week pilot study of 50 healthy women taking 300 mg of a root extract twice daily reported higher Female Sexual Function Index scores than placebo, including sexual arousal and lubrication, which the authors framed as relevant to sexual dysfunction. A separate trial in 80 women with low sexual desire found a similar pattern at the same dose. Both were small, both enrolled healthy women rather than women with a diagnosis, and both studied 600 mg a day, double the amount in a single scoop.

Testosterone and male fertility. Much of ashwagandha's buzz comes from research in men, including testosterone levels and male fertility. The same 2026 meta-analysis found higher testosterone with ashwagandha, while the NIH calls the evidence on male fertility limited. Neither tells a woman much about her own body.

Should women take ashwagandha every day, and for how long?

Most trials used a daily dose for 8 to 12 weeks. The NIH says ashwagandha may be safe for up to three months and that long-term safety isn't known. Harvard Health says a few small studies went to 12 months. Decide the length of use with your doctor, and reassess regularly.

Trials topped out around 600 mg a day, so high doses are uncharted territory, and more isn't better. If you're unsure whether ashwagandha is safe at the dose you're considering, ask your pharmacist.

There's no proven best time of day. Harvard Health says research on timing is limited, so you can experiment: some people prefer taking it earlier if it's for daytime stress, or near bedtime if sleep is the goal. Consistency matters more than the clock.

Nobody says you have to take ashwagandha forever, and taking breaks is a reasonable way to check whether ashwagandha root is still doing anything for you. If your stress eases, your sleep improves, or you change medication, it's reasonable to take a break and see how you feel.

What else helps when anxiety and cortisol are high?

Sleep, movement, food, and support do more than any herb. Harvard Health's reviewing physician calls ashwagandha "a tool" and says he would never call it the one thing a person needs. For ongoing anxiety, therapy and, when appropriate, medication are first-line options to discuss with a clinician.

Cleveland Clinic makes the same point from a different angle: ashwagandha should be considered a complementary practice, not an alternative medicine that replaces proven treatments. Good stress management usually looks boring: consistent sleep, daily movement, regular meals, and people you can talk to. Reducing stress at the source beats managing its symptoms, when you can swing it, and it's fine to ask for help to manage stress that's bigger than you. Some women find the basics easier to build when the background noise is turned down a notch, and their overall well-being follows when those basics hold. An evidence-based complementary approach treats ashwagandha as a small add-on, not the plan. Here are four things to try alongside it:

• Eat breakfast with protein, so your first stress of the day doesn't land on an empty stomach.
• Move your body most days. Walking counts.
• Protect a wind-down window. Fifteen screen-free minutes before bed beats a heroic bedtime routine you'll never keep.
• Say it out loud to someone. A doctor, a counselor, a friend. Anxiety loses some power when you stop managing it alone.

If you ever feel unsafe, or like you might hurt yourself, call or text 988 in the United States right away.

Is ashwagandha right for you?

It might be if your stress is the ongoing, juggling-too-much kind, you have no thyroid, autoimmune, or pregnancy concerns, and your doctor is fine with it. It's probably not the right first step for panic attacks, severe anxiety, or anything that's getting in the way of daily life.

Before you take ashwagandha, ask whether ashwagandha is safe for you given your medicines, including any for high blood pressure, and be ready to give it eight weeks of consistent use. Your own tracking is better evidence than anyone's anecdote, including ours.

For a lot of women, the part that helps most is the routine itself: one scoop at the same time each day, and people around you doing the same. If you're building that routine, the Wellness Lab is where Sam shares the daily habits behind it, so the supplement is one small piece of a bigger rhythm. Straighten your crown.

Frequently asked questions

Does ashwagandha really work for anxiety?

It may help with mild stress and anxiety symptoms, and meta-analyses of randomized trials show benefit over placebo. But the trials are small and varied, and the NIH calls the anxiety evidence unclear. It isn't a treatment for an anxiety disorder.

How long should I take ashwagandha for anxiety?

Most trials ran about 8 weeks. Give it about two months of daily use to judge, and keep to the three-month window the NIH considers reasonably safe unless your doctor advises otherwise. Reassess with your clinician before continuing longer.

What is the dark side of ashwagandha?

Rare liver injury has been reported, it can raise thyroid hormone levels, and it can interact with several medicines. Some people feel more stimulated or anxious instead of calm. Pregnancy, breastfeeding, thyroid disease, autoimmune disease, and upcoming surgery are reasons to skip it or ask first.

What does ashwagandha do to females?

Most of the research is on stress, anxiety, and sleep in mixed groups of men and women. Two small trials in women looked at sexual health, covered above, and they used about 600 mg a day. Evidence for menopause symptoms and other women's health uses is limited, according to NIH and Harvard Health. Women's specific studies are small, so don't expect more than the stress and sleep research supports.

What should you never mix with ashwagandha?

Check with your pharmacist before combining it with medicines for diabetes, blood pressure, seizures, sleep, anxiety, or thyroid disease, or with drugs that suppress the immune system. These are the interactions the NIH lists. Don't combine it with other sedating supplements without advice.

How do you deal with severe anxiety?

Start with a clinician. Therapy, medication, or both help many people with severe anxiety, and a supplement isn't a substitute. In a crisis in the United States, call or text 988.

Ready to try a daily scoop with 300 mg of KSM-66 ashwagandha?

Queen's Blend puts 300 mg of KSM-66 ashwagandha in one zero-sugar scoop with 3 g of creatine monohydrate, 15 mg of saffron extract, and 2.1 g of FiberSmart, made for women 40+. No stimulants. Mix it into cold water, a smoothie, or an electrolyte drink, or into coffee if that's easier. Check with your doctor first if you take medication or have a thyroid condition.

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Reflection question: What's one thing on your plate this week that you could hand off, delay, or drop, so your stress has a little less to feed on?

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. Individual results vary. Consult your healthcare provider before use, especially if you are pregnant, nursing, or taking medication.