Ashwagandha Dosage: How Much to Take Per Day for Stress, Sleep, and Performance

Determining the right ashwagandha dosage can be as confusing as trying to pronounce the word itself. Despite being one of the most well-known adaptogenic herbs, you’ll find widely varying recommendations on just how much ashwagandha to take. One article recommends 300 milligrams per day, another says 600 is the sweet spot, and some may suggest double that amount. 

Ultimately, there isn’t a single “best” dose for everyone. While the most clinically studied range is 300-600 mg per day of a standardized ashwagandha root extract (more on exactly what that is later), the ideal amount depends on your goal and the source. 

Whether you’re trying to support a healthy stress response*, get better quality sleep, or boost your performance in the gym, understanding what ashwagandha actually is, the different forms of ashwagandha, and the optimal goal-based dose can help put you on the path to success.

Table of Contents

• What’s the Recommended Ashwagandha Dosage?
• Ashwagandha Dosage by Goal
• Why the Form of Ashwagandha Changes Your Dose
• When to Take Ashwagandha (And Whether Timing Matters)
• How Long Does Ashwagandha Take to Work?
• Is It Safe to Take More Than 600 mg of Ashwagandha?
• Who Should Be Cautious With Ashwagandha?
• How to Choose a Quality Ashwagandha Supplement

What’s the Recommended Ashwagandha Dosage?

Most research supports an ashwagandha dosage of 300 to 600 milligrams per day of a standardized root extract, taken for at least 8 weeks. This is the most commonly cited range across NIH and the largest randomized trials.

The 300–600 mg Sweet Spot

Most ashwagandha research centers around its ability to reduce stress and anxiety and improve sleep. A 2021 systematic review took a look at seven studies on this topic, concluding that ashwagandha significantly reduced stress and anxiety levels, reduced sleeplessness and fatigue, and reduced serum cortisol levels (our stress hormone) (1). In several of those studies, the participants experienced greater benefits with doses of 500-600 mg/day than lower doses (with 240 mg being on the low end).

Ultimately, the 300-600 mg range seems to be the sweet spot. This daily dose recommendation comes from an international task force created by the World Federation of Societies of Biological Psychiatry (WFSBP) and the Canadian Network for Mood and Anxiety Treatments (CANMAT). It’s important to note the source (standardized ashwagandha root extract) and the duration (at least eight weeks). That same 2021 systematic review showed similar findings with ashwagandha dosage (600 mg/day) and treatment duration (at least eight weeks) for sleep benefits. 

Why Daily Consistency Matters More Than a Perfect Number

Whether you opt for the lower end of the recommended ashwagandha dose or shoot past that 600 mg mark, prioritize consistency over hitting the perfect number. 

Unlike caffeine or stimulants that produce noticeable tangible effects, ashwagandha works gradually. Think of it similarly to how you take creatine. You don’t notice the benefits via a single dose. Rather, you need to maintain consistent intake over a length of time to take advantage of this adaptogen. 

So, instead of stressing over a specific number, support a better stress response by sticking to a consistent supplementation schedule.

What “Standardized to 5% Withanolides” Actually Means

When a supplement label says “standardized to 5% withanolides,” you should consider that a green flag. That means the supplement contains a minimum of 5% of withanolides, the naturally occurring chemical compounds in ashwagandha that researchers believe are responsible for the herb’s adaptogenic properties. 

In fact, extensive pharmacologic research has shown they can help suppress inflammatory signaling pathways, reduce oxidative stress, and support brain health and cognitive function (2). 

Because the concentration of these compounds can vary from one plant to another, standardization helps create a more consistent, reliable product. 

Ashwagandha Dosage by Goal

The right ashwagandha dose depends on your goal: 300–600 mg/day of standardized extract is the consensus range for stress and sleep, while 500–1,000 mg/day (divided into two doses) is more common in athletic performance studies. Let’s explore each of those use cases a bit more.

Dosage for Stress and Anxiety

As noted earlier, research on the efficacy of ashwagandha root extract for its stress and anxiety response benefits suggests a daily dose of 300-600 mg (1). Multiple studies show this to be an effective range for positive effects on stress, anxiety, and even energy levels. Ashwagandha is one tool for stress management; for more strategies, see how to lower cortisol levels.

Dosage for Sleep Quality

According to the NIH, the sleep studies the NIH reviews mostly used 250 to 600

mg/day, with the best results at 600 mg for at least 8 weeks.. Studies have shown improvements in sleep quality, sleep efficiency, and the amount of time it takes participants to fall asleep. It’s important to note that the sleep-related benefits were most prominent when the dose was 600 mg/day and when the treatment duration lasted at least 8 weeks. For a complete approach to sleep that goes beyond supplementation, see the full guide to better sleep.

Dosage for Athletic Performance and Strength

You’ll likely need to bump your dosage if you’re looking for athletic performance and strength benefits. One meta-analysis on the effects of ashwagandha on physical performance showed a total dose of 330 to 1,000 mg/day for 8 to 24 weeks significantly improved aerobic capacity and performance in healthy adults, hockey players, and elite cyclists (3). 

Meanwhile, a 2015 study on muscle strength and recovery found that an eight-week ashwagandha supplementation protocol led to significant increases in muscle mass and strength (4). So, whether you want to improve your VO2 max or enhance your strength, a daily dose of about 500-1,000 mg (often split into two servings) is a good figure to shoot for. 

Dosage for General Wellness and Energy

If you’re looking into ashwagandha for general wellness rather than a specific performance goal, somewhere between 250-500 mg/day is a practical approach. This gives you a chance to assess your tolerance and determine if you’re on the right track, need to scale back, or potentially increase your daily intake. Start on the lower end of that scale before ramping up. 

Why the Form of Ashwagandha Changes Your Dose

The same milligram number means different things depending on the form: KSM-66 root extract is typically dosed at 300–600 mg/day, Sensoril root-and-leaf extract is more concentrated and effective at 125–250 mg/day, and raw root powder requires several grams to match the same active compound.

KSM-66 Ashwagandha

As the most widely studied form of ashwagandha, KSM-66 is produced exclusively from the root via a unique extraction process that doesn’t involve alcohol or synthetic solvents. This highly concentrated, patented root extract is standardized to contain 5% withanolides. A 2012 study on KSM-66 shows that 600 mg/day contributed to significant stress and anxiety symptom reductions, as well as improvements in serum cortisol, which can help restore your body’s natural circadian rhythm (5).

Sensoril Ashwagandha

Another patented, highly concentrated ashwagandha extract, Sensoril utilizes both the root and the leaves of the plant. Unlike KSM-66 ashwagandha, it is standardized to a higher percentage of active compounds (10%), leading to lower dosing recommendations. Many Sensoril-based products provide roughly 125-250 mg/day due to their higher concentration of withanolides. 

Raw Root Powder

As the least-concentrated form, raw root powder is much more difficult to standardize. The withanolide content can vary substantially due to environmental factors, as well as the harvesting and processing methods. Naturally, that makes it much more challenging to determine how much of the active compounds you’re getting in each serving. 

As a result, you’ll often see much higher dosing recommendations. The 2021 systematic review I referred to earlier suggests about 6 grams of root powder.  

How to Read a Label and Find the Right Form

You should always look at a supplement label with a keen eye. For ashwagandha products, specifically, here’s what to focus on:

1. Identify the serving size and the amount of ashwagandha provided per serving.
2. Look for a branded extract such as KSM-66 or Sensoril, as these have been studied extensively
3. Look for language that indicates the extract has been standardized
4. Find the withanolide percentage
5. Check for third-party testing certifications to verify purity, potency, and product quality

When to Take Ashwagandha (And Whether Timing Matters)

Ashwagandha can be taken at any time of day, but most clinical trials use a divided morning-and-evening dose taken with food. Consistency matters more than the exact time of day.

Morning vs Evening

Is AM or PM more ideal for adaptogenic support? Here’s a quick rundown of the pros of each approach.

Morning

• Supports a healthy stress response during the day
• May help promote focus and concentration
• Easy to incorporate into your existing supplement routine
• Some may prefer the morning if they experience an energizing effect

Evening

• May support relaxation and recovery, especially after a stressful day
• Commonly used by folks who want to improve their sleep quality
• Calming effect may be better suited for evening/nighttime 

With Food or Empty Stomach?

Like many supplements, there’s always a debate about whether to take ashwagandha with food or on an empty stomach. Luckily, you don’t have to do one or the other; it can be taken either way. 

However, taking it with a small meal or snack may help reduce the likelihood of nausea or digestive discomfort. This is one of the main reasons many clinical studies have participants take their doses after meals. 

Splitting Your Daily Dose

If you’re concerned about GI side effects and overall tolerability, one effective supplementation method is to split your daily dose up. Here are a few practical ways to go about this: 

• 1,000 mg daily: 500 mg in the morning + 500 mg in the evening
• 600 mg daily: 300 mg in the morning + 300 mg in the evening
• 500 mg daily: 250 mg in the morning + 250 mg in the evening

Overall, taking this twice-daily approach can be more practical and reduce your chances of dealing with an upset stomach (and the mental stress that comes along with it). 

How Long Does Ashwagandha Take to Work?

Most clinical trials show measurable changes in stress and sleep markers after 4 to 8 weeks of daily ashwagandha use, with full benefits typically appearing by 12 weeks. Sleep-related improvements tend to take a little longer than stress benefits, often requiring at least 8 weeks of consistent supplementation at 600 mg/day to fully take effect. For a deeper breakdown of the research timelines by goal, including stress, sleep, and performance, see how long does ashwagandha take to work.

Is It Safe to Take More Than 600 mg of Ashwagandha?

Yes, ashwagandha doses up to 1,250 mg/day have been used safely in clinical studies, and a 12-month observational study of 600 mg/day KSM-66 found no adverse effects on liver, kidney, or thyroid function. 

However, higher doses still warrant a conversation with a healthcare provider.

What the Long-Term Safety Data Shows

Not only has ashwagandha been used in traditional Ayurvedic medicine for thousands of years, but modern research supports its safe use. A 2025 study evaluating 600 mg of KSM-66 daily for 12 months found that the supplement was generally well-tolerated, with only a small percentage of participants reporting mild side effects like nausea and gastrointestinal discomfort (6). 

Most importantly, there were no clinically significant adverse effects on liver function, kidney function, thyroid hormones, or other key health markers. 

Common Mild Side Effects

You shouldn’t be too concerned about any tangible negative side effects from ashwagandha supplementation. However, you may experience:

• Digestive discomfort
• Nausea
• Drowsiness
• Headache

Again, this is why splitting your dose (or just starting with a lower one in the beginning) is a smart strategy that may help you avoid these side effects. 

When to Lower or Stop Your Dose

If you experience digestive issues, excessive drowsiness, persistent headaches, or any unexpected symptoms after you start taking ashwagandha, try scaling back your dose. You should also speak with your healthcare provider, as medications or a medical condition may impact how your body responds to this adaptogen. 

Who Should Be Cautious With Ashwagandha?

People who are pregnant or nursing, those taking thyroid, blood pressure, diabetes, or sedative medications, and anyone with an autoimmune condition or active liver disease should talk to a healthcare provider before starting ashwagandha.

Pregnancy and Nursing

While ashwagandha is generally safe, there are risks to consider for pregnant women. According to the NIH, some experts advise against using it due to risks of miscarriage (1). In fact, Denmark outright banned ashwagandha in 2023 following a risk assessment conducted by the Technical University of Denmark. A year later, the French Agency for Food, Environmental, and Occupational Health and Safety (ANSES) advised certain groups to avoid ashwagandha supplementation, including pregnant or breastfeeding women and individuals with endocrine-related conditions.

While more research must be done in this area, a 2026 study showed promising signs for pregnant women. After 12 weeks of ashwagandha root extract supplementation, participants showed improved hemoglobin levels, red blood cell quality, perceived stress, and multiple aspects of sleep quality with no adverse events reported (7). Anyone who is pregnant or nursing should speak with a healthcare provider prior to using ashwagandha. 

Medication Interactions

As is the case with any supplement, you always need to consider how it may interact with other medications you’re taking. If you’re taking prescription medications for blood pressure management, diabetes, or thyroid function, you should speak to your healthcare provider before adding ashwagandha to your list.

Thyroid and Autoimmune Considerations

While it’s far from clear-cut, there are concerns to consider regarding ashwagandha's impact on thyroid hormone synthesis. Its stimulatory effects on this process can be problematic for people with thyroid issues (8).

In addition, a 2025 systematic scoping review on herbal supplements identified ashwagandha as one of the 15 with the strongest supporting evidence that it can trigger or exacerbate autoimmune issues, particularly those affecting the skin (9). 

How to Choose a Quality Ashwagandha Supplement

Look for a standardized extract (KSM-66 or Sensoril are the two most-studied, but there are other forms available), a label that lists the withanolide percentage, third-party testing certifications, and a clinically supported dose per serving (typically 300–600 mg of root extract). 

Keep in mind that you don’t have to hit that standalone range to experience the benefits. A lower dose still works when ashwagandha is paired with other adaptogens like Rhodiola, which is exactly how Core-21 and Adrenal Restore are formulated.  

Standardized Extracts vs Generic Root Powder

You should always opt for a standardized extract over a generic root powder purely for transparency's sake. The former provides a known amount of active compounds, while the latter is much more difficult to consistently measure.  

Third-Party Testing Certifications

A supplement that features third-party testing certification should give you peace of mind about what you’re putting into your body. This ensures that a product is free from contaminants like heavy metals and pesticides. 

Why Complementary Ingredients Can Help

While ashwagandha can be effective on its own, some formulas contain other ingredients that support relaxation, hormonal balance, and overall wellness. 

If you want a clinically supported ashwagandha dose paired with other ingredients formulated for women's hormonal balance and stress support, Harmony is built around exactly that combination. In addition to KSM-66 ashwagandha, it contains useful ingredients like maca root (another adaptogen), Calcium D-Glucarate, which research suggests may support the body's natural processing of estrogen (10), and Chasteberry, which research suggests may help support premenstrual comfort (11).  

Read more about how to choose the best ashwagandha supplement. 

Conclusion

For most adults, a 300–600 mg daily dose of a standardized root extract taken for at least 8 weeks is the practical way to incorporate ashwagandha into your supplement routine. That makes Harmony the ideal choice for women, specifically, since it includes a clinically studied ashwagandha dose paired with other ingredients formulated for hormonal balance and stress support. 

Of course, that’s just the tip of the iceberg when it comes to 1st Phorm hormone support supplements. So, don’t be afraid to explore your options so you can keep your body and brain functioning at their highest level. After all, internal harmony can lay the foundation for feeling, performing, and living at your best. 

*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.

Frequently Asked Questions

Can you take 600 mg of ashwagandha every day?

Yes, 600 mg of ashwagandha per day is a commonly studied dose for standardized root extracts. If you’re new to this supplement, you can start with 300 mg per day and work up to 600 mg, or more, if you’re looking for athletic performance and strength benefits. 

Is it better to take ashwagandha in the morning or at night?

You can take ashwagandha in the morning or at night, depending on your goal and how your body responds. If you’re taking it for daily stress support, morning or divided dosing may make sense. However, if you’re taking it for relaxation or improved sleep quality, evening use may be more practical. What’s most important is taking it consistently. 

What happens if you take too much ashwagandha?

Taking too much ashwagandha may increase the risk of side effects like nausea, diarrhea, drowsiness, or headache. If you feel overly sedated or experience persistent digestive issues, lower your dose or stop taking it and consult with your healthcare provider.

Does ashwagandha actually work for stress and sleep?

Research suggests ashwagandha can help support a healthy stress response and improve sleep quality. Several studies show benefits after consistent use for about 8 weeks, especially with standardized extracts in the 300–600 mg/day range. Keep in mind that supplementation is just part of the equation, as you still need to prioritize sleep hygiene, proper nutrition, and other lifestyle habits that support a healthy stress response and quality rest. 

What’s the difference between KSM-66 and Sensoril ashwagandha?

KSM-66 is a root-only ashwagandha extract that is typically standardized to 5% withanolides and commonly dosed around 300–600 mg per day. Sensoril is another patented extract made from both the root and the leaf. As a result, it’s usually more concentrated, so it is often used at lower doses ranging between 125–250 mg per day.

References

(1) National Institutes of Health, Office of Dietary Supplements. (2025, May 2). Ashwagandha: Is it helpful for stress, anxiety, or sleep? Health professional fact sheet. U.S. Department of Health and Human Services. https://ods.od.nih.gov/factsheets/Ashwagandha-HealthProfessional/

(2) White, P. T., Subramanian, C., Motiwala, H. F., & Cohen, M. S. (2016). Natural Withanolides in the Treatment of Chronic Diseases. Advances in experimental medicine and biology, 928, 329–373. https://doi.org/10.1007/978-3-319-41334-1_14

(3) Bonilla, D. A., Moreno, Y., Gho, C., Petro, J. L., Odriozola-Martínez, A., & Kreider, R. B. (2021). Effects of Ashwagandha (Withania somnifera) on Physical Performance: Systematic Review and Bayesian Meta-Analysis. Journal of functional morphology and kinesiology, 6(1), 20. https://doi.org/10.3390/jfmk6010020

(4) Wankhede, S., Langade, D., Joshi, K., Sinha, S. R., & Bhattacharyya, S. (2015). Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial. Journal of the International Society of Sports Nutrition, 12, 43. https://doi.org/10.1186/s12970-015-0104-9

(5) Chandrasekhar, K., Kapoor, J., & Anishetty, S. (2012). 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 journal of psychological medicine, 34(3), 255–262. https://doi.org/10.4103/0253-7176.106022

(6) Salve, J., Kale, S., Prajapati, B. L., Sparavigna, A., Savant, M., Ademola, J., et al. (2025). Safety of 12-month administration of Ashwagandha (Withania somnifera) standardized root extract in healthy adults: A prospective, observational study. Phytotherapy Research. Advance online publication. https://doi.org/10.1002/ptr.70096

(7) Ajgaonkar, A., Tayade, H., & Nayak, A. (2026). Efficacy and safety of Ashwagandha (Withania somnifera) root extract in pregnant women: a prospective, randomized, comparative, open-label, 12-week study. Frontiers in Global Women's Health, 7, 1767865. https://doi.org/10.3389/fgwh.2026.1767865

(8) Alhilali, H., & Okwuosa, T. (2026). Ashwagandha-induced biochemical thyrotoxicosis in a patient with prior thyroiditis [Abstract]. Endocrine Practice, 32(4, Suppl.), S118. https://doi.org/10.1016/j.eprac.2026.01.606

(9) Weiner JD, Hill A, Shen C, On A, Werth VP. Identifying immunostimulatory herbal supplements that may flare autoimmune skin diseases: a systematic scoping review. Lupus Science & Medicine. 2025;12:e001803. https://doi.org/10.1136/lupus-2025-001803

(10) Calcium-D-glucarate. (2002). Alternative medicine review: a journal of clinical therapeutics, 7(4), 336–339.

(11) Csupor, D., Lantos, T., Hegyi, P., Benkő, R., Viola, R., Gyöngyi, Z., Csécsei, P., Tóth, B., Vasas, A., Márta, K., Rostás, I., Szentesi, A., & Matuz, M. (2019). Vitex agnus-castus in premenstrual syndrome: A meta-analysis of double-blind randomised controlled trials. Complementary therapies in medicine, 47, 102190. https://doi.org/10.1016/j.ctim.2019.08.024