Stress Is Keeping You Awake

Stress Is Keeping You Awake: What Ashwagandha Can and Can't Do for Sleep

The day ended hours ago. Your body didn't get the memo.

You are lying in the dark replaying a conversation, drafting a reply to an email you have not opened yet, running the numbers on something that cannot be solved at midnight.

Somewhere along the way, someone told you to try ashwagandha.

It is everywhere right now, in capsules, gummies, powders and coffee blends, and its botanical name, Withania somnifera, literally hints at sleep. The claims around it range from reasonable to wildly overstated.

This article sorts one from the other: how stress keeps you awake, what the peer-reviewed research on ashwagandha actually shows, where it falls short, and who should skip it entirely.

If you have not read it yet, The Sleep Struggle: Tired, But Still Wired explains why exhaustion and alertness can show up at the same time. This is the stress side of that story.

What's in This Article

How Stress Steals Your Sleep
What Ashwagandha Actually Is
What the Research Shows
What It Can't Do
The Parts That Are Not Settled
Who Should Be Careful
How to Use It Well
What Supplements Can and Can't Do
Frequently Asked Questions

How Stress Steals Your Sleep

Your stress response is built for one job: keeping you alert when something needs handling.

That is useful at 2 p.m. with a deadline. It is a problem at 11 p.m. with nothing left to do but sleep.

Under normal conditions, cortisol, the main stress hormone, peaks around the time you wake and falls to its lowest levels in the evening and early part of the night. In a study published in the Journal of Clinical Endocrinology & Metabolism, Vgontzas and colleagues found that people with chronic insomnia had higher cortisol and ACTH, particularly in the evening and early night. Researchers describe this as hyperarousal: a body and brain still operating at daytime intensity when sleep should take over.

Then the loop closes. In a large study of Swedish working adults, Åkerstedt and colleagues found that being unable to stop thinking about work during free time was the strongest predictor of disturbed sleep. Åkerstedt's later review found that dreading high demands the next day matters most. And poor sleep makes the next day's stress feel heavier, which sets up the next night.

Stress and sleep feed each other. Break the loop anywhere and both improve.

What Ashwagandha Actually Is

Ashwagandha is a small shrub whose root has been used in Ayurvedic medicine for centuries. It is classed as an adaptogen, a term for herbs believed to help the body handle stress more evenly rather than pushing it in one direction.

The species name somnifera means "sleep-inducing." In one animal study, researchers found that a compound in the leaves, triethylene glycol, increased deep non-REM sleep in mice. That is interesting, but it is animal research, and most supplements use the root, not the leaf.

Modern clinical trials almost always use standardized root extracts, typically at roughly 240 to 600 mg per day, measured for their content of compounds called withanolides. That detail matters. The NIH Office of Dietary Supplements notes that because studies have used so many different preparations and doses, it is difficult to identify specific extracts or recommended amounts. Results from one product do not automatically apply to another.

It is not a sedative, and it is not a sleeping pill. It is a daily herb studied over weeks.

What the Research Shows

On stress. Several randomized, placebo-controlled trials point in the same direction.

In a 60-day trial of 64 adults, Chandrasekhar and colleagues found perceived stress fell 44% in the ashwagandha group versus 5.5% on placebo, and blood cortisol fell 28% versus 8%. Salve and colleagues found lower perceived stress and cortisol after 8 weeks at both 250 mg and 600 mg a day. Lopresti and colleagues found lower anxiety scores and lower morning cortisol, though self-rated stress did not differ significantly from placebo.†

A 2022 meta-analysis in Phytotherapy Research pooled 12 trials with 1,002 participants and found significant reductions in both stress and anxiety. The authors also rated the certainty of that evidence as low, and called for larger, higher-quality studies.†

On sleep. In a 2019 trial, Langade and colleagues gave 60 adults with insomnia either 300 mg of ashwagandha root extract twice daily or a placebo for 10 weeks, and tracked their sleep with wrist-worn monitors. The ashwagandha group fell asleep faster (about 29 minutes versus 34) and had better sleep efficiency and sleep quality scores. Not every sleep measure reached statistical significance.†

A 2021 systematic review and meta-analysis in PLoS One by Cheah and colleagues pooled five trials with 400 participants. The authors described the overall effect on sleep as small but significant, and rated the evidence moderate in quality. Effects were more prominent in adults with insomnia, at doses of 600 mg or more per day, and with treatment lasting eight weeks or longer.†

That pattern is the key. Ashwagandha appears to work less like a sleep aid and more like a stress buffer. The sleep benefits, where they show up, seem to follow from a calmer stress response over time.

Real, modest, and it takes weeks. That is the honest shape of the evidence.

What It Can't Do

It will not put you to sleep tonight. The trials that found benefits ran for 8 to 10 weeks. If you take ashwagandha once at 1 a.m., the research gives you no reason to expect much.

It will not cancel what is causing the stress. A calmer stress response is useful. It does not shorten the workload, resolve the conflict or make the late-night email disappear.

It will not outvote poor sleep habits. A 4 p.m. coffee, a phone in bed and a wake time that drifts two hours every weekend will keep working against you no matter what you take.

It is not a treatment for insomnia or anxiety disorders. If stress has become persistent anxiety, or sleep trouble has lasted months, those deserve real care. The American College of Physicians recommends cognitive behavioral therapy for insomnia (CBT-I) as the initial treatment for chronic insomnia, and the American Academy of Sleep Medicine gives it a strong recommendation.

Support for stress, not a knockout for sleep.

The Parts That Are Not Settled

This is where most articles would stop and sell you a protocol. Here is what the research does not yet support.

The trials are small and short. The NIH Office of Dietary Supplements describes most ashwagandha trials as fairly small and of short duration. It notes ashwagandha appears well tolerated for up to about three months, but its long-term safety is not known.

Much of the research has industry ties. Several well-known trials were funded by, or used products supplied by, the companies that make branded ashwagandha extracts. That does not make the findings wrong, but independent replication is limited.

Extracts differ. Different brands use different parts of the plant, different extraction methods and different withanolide levels. A result for one extract is not guaranteed for another.

Cortisol is a messy measure. Several trials report lower cortisol, usually from a single morning sample. Cortisol swings substantially across the day, so one reading is a limited snapshot.

We would rather tell you this than have you discover it. The honest summary: consistent but low-certainty evidence for stress, a smaller effect on sleep that seems to come through stress, and real open questions about long-term use.

Who Should Be Careful

Herbal is not the same as harmless. Ashwagandha is well tolerated by most people in short-term trials, but there are clear groups who should check first or skip it.

Pregnant or breastfeeding. Avoid it. The NIH Office of Dietary Supplements notes that some experts advise against use in pregnancy, and that reports suggest it may have the potential to cause miscarriage. The same caution applies to men with hormone-sensitive prostate cancer.

Thyroid conditions. In a small trial of 50 people with subclinical hypothyroidism, ashwagandha raised thyroid hormone levels compared with placebo, and case reports have described thyrotoxicosis (an overactive thyroid state) in people taking it. That may matter if you have a thyroid condition or take thyroid medication.

Liver concerns. Liver injury linked to ashwagandha supplements is rare but documented, including a case series from Iceland and the U.S. Drug-Induced Liver Injury Network and a 2023 case series from India, whose authors warned the risk is greater for people with existing liver disease. Stop and see a doctor if you notice yellowing skin or eyes, dark urine, itching or unusual fatigue. Denmark banned the sale of ashwagandha products in 2023 after a government risk assessment raised concerns about effects on hormones and pregnancy, and France's food safety agency has advised pregnant and breastfeeding women and people with hormone disorders to avoid it.

Medications. The NIH notes possible interactions with diabetes medications, blood pressure medications, immunosuppressants and sedatives. Talk to your doctor or pharmacist before combining it with any of those, or with sleep medications, antidepressants or thyroid medication.

Autoimmune conditions or upcoming surgery. Get medical advice first.

How to Use It Well

1. Take it daily, not in emergencies. The research is built on consistent use. Pick a time you will not forget, usually with a meal.

2. Give it eight weeks before you judge it. That is where the sleep effects showed up in the research. A week tells you very little.

3. Give stress an exit before bed. Spend five minutes writing tomorrow's to-do list. In a sleep-lab study published by the American Psychological Association, people who wrote a specific to-do list fell asleep faster than people who wrote about tasks they had already finished.

4. Build a real transition out of the workday. A walk, a change of clothes, a cue your nervous system can register. We covered this in Are You Bringing Work Stress Home?

5. Move the caffeine cutoff earlier. In a small controlled study, a large dose of caffeine taken six hours before bed still cut objectively measured sleep by more than an hour. Stress plus late caffeine is a hard combination to sleep through.

6. Know when to get help. Sleep trouble at least three nights a week for three months, or stress that has become constant worry, deserves a conversation with your doctor.

What Supplements Can and Can't Do

Straight answer, because this corner of the market is not always straight.

No supplement makes a stressful season disappear, and ashwagandha is not a sleeping pill. What a well-built formula can do is support how your body handles stress during the day, so less of it follows you to bed.†

Stress & Mood Support is built around that idea. It pairs Ashwagandha Root Extract and Rhodiola Rosea for stress resilience with L-Theanine (Suntheanine®) and Passion Flower for calm, plus Saffron and Magnesium for mood and nervous system support. It is caffeine free, non-sedating and designed for daytime use: three capsules daily, preferably in the morning or early afternoon, with food. Every dose is printed on the label, with no proprietary blends, the standard we argued for in Your Supplements Could Be Fake… Legally.†

If the nights still need help once the days are calmer, Sleep & Recovery Support is our melatonin-free evening formula. Day and night, two different jobs.†

One honest note on timing. Adaptogens are studied over weeks of consistent use. Anyone promising you will sleep like a baby by Friday is describing a marketing timeline.†

A supplement should support the system. It should never be the system.

Frequently Asked Questions

Does ashwagandha help you sleep?
Research suggests a small but real improvement in sleep, more prominent in people with insomnia, at doses of 600 mg or more per day, taken for eight weeks or longer. It appears to work mainly by easing the stress response rather than acting as a sedative.†

Should I take ashwagandha in the morning or at night?
The research focuses on consistent daily use more than timing. Many people take it in the morning or with a meal. Stress & Mood Support is designed for morning or early afternoon use.†

How long does ashwagandha take to work?
Most trials measured benefits after 8 to 10 weeks. Some people notice a calmer day sooner, but give it at least a couple of months of consistent use before deciding.†

Is ashwagandha safe?
According to the NIH, it appears well tolerated for up to about three months, but long-term safety is not known. Avoid it if you are pregnant or breastfeeding, and talk to your doctor first if you have a thyroid, liver or autoimmune condition, or take sedatives, antidepressants, or thyroid, blood pressure, diabetes or immune-suppressing medication.

Can I take ashwagandha with a sleep supplement?
Many people use a daytime stress formula and an evening sleep formula for different jobs. Check with your doctor or pharmacist first, particularly if either contains sedating herbs or 5-HTP, or if you take any prescription medication.

Is ashwagandha the same as melatonin?
No. Melatonin is a hormone that signals timing to your body clock. Ashwagandha is an herb studied for the stress response. They work on different problems.

References

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†These statements have not been evaluated by the FDA. Statements are not intended to diagnose, prevent, treat, or cure any disease.