Herbs for Sleep: What the Evidence Says, and Which to Be Careful With

Short answer: Herbs such as valerian, chamomile, passionflower and lavender have long traditions as sleep aids, but research on them is small and mixed, and none has been shown to treat insomnia reliably. Some are gentle enough to try as part of a bedtime routine. Others carry real cautions, including rare liver injury with kava, ashwagandha and valerian products, and extra drowsiness when combined with sedating medicines or alcohol. “Herbal” does not automatically mean safe, so check with a pharmacist before adding any herbal sleep aid.

Why people reach for herbs for sleep

Many people want something gentler than a sleeping pill, or something without melatonin. That is reasonable. But the most useful question is not “which herb is strongest?” It is “what is keeping me awake?” A busy mind at bedtime, night waking at 3 AM, pain, night-time trips to the bathroom and breathing pauses all call for different responses. An herb is unlikely to fix sleep that is broken for a medical reason.

It also helps to know how herbal products are sold in the U.S. They are regulated as dietary supplements, which means they are not reviewed for effectiveness before sale, and strength and purity vary from brand to brand.

The main herbs for sleep, compared

The National Center for Complementary and Integrative Health concludes that herbs such as valerian, chamomile and kava have not been shown to be effective for insomnia, and the American Academy of Sleep Medicine advises against valerian for chronic insomnia.

A closer look at the popular herbs

Valerian root

Valerian is the herb most people mean by “herbal sleep aid,” and it appears in many sleep blends. Some reviews find a modest effect on how people rate their sleep; others find little difference from placebo, and study quality varies. Some people dislike its strong smell or notice next-day grogginess or headache. Because it can add to the effect of other sedating products, avoid combining it with alcohol or sleep medicines, and ask a clinician first if you have liver disease.

Chamomile

Chamomile tea is one of the most familiar bedtime rituals, and for many people the routine itself is part of the appeal: a warm, caffeine-free drink that signals the end of the day. Clinical evidence for sleep is limited. People allergic to ragweed, daisies or marigolds may react to it, and anyone on blood thinners or transplant medicines should check with a pharmacist. Also watch the timing: a large drink close to bedtime can mean a bathroom trip at night.

Passionflower

Passionflower has a long history as a calming herb. A small amount of research suggests it might lengthen sleep, but results on falling and staying asleep are mixed. It can cause drowsiness, dizziness and confusion, and NCCIH advises against it during pregnancy.

Lavender

Lavender is usually used as a scent rather than swallowed. Whether lavender aromatherapy helps sleep is still unclear, but a pleasant, consistent bedtime scent is a low-risk part of a wind-down routine for most adults. Never swallow essential oils, and keep them away from children and pets.

Ashwagandha and other “adaptogens”

Ashwagandha is marketed for stress and sleep, and some small studies look promising. However, the NIH LiverTox database lists it as an uncommon but likely cause of liver injury, and long-term safety is not established. It may also affect thyroid levels. Avoid it during pregnancy, and ask a clinician first if you have liver or thyroid conditions or take other medicines.

Kava

Kava is sometimes promoted for relaxation, but there is very little sleep research, and kava supplements have been linked to severe liver damage. For sleep, the risk is hard to justify.

Who should be extra careful with sleep herbs

• People taking sedating medicines, including sleep, anxiety, pain and allergy medicines. Effects can add up.
• Older adults, for whom extra drowsiness raises the risk of falls at night. Our guide to sleeping pills for the elderly covers the same concern with medicines.
• Anyone with liver disease or who drinks alcohol regularly.
• People who are pregnant or breastfeeding.
• Anyone scheduled for surgery, since some herbs affect the nervous system and should be stopped beforehand on your surgeon’s advice.
• Children, unless a pediatrician has advised it.

How to try an herbal sleep aid more safely

1. Ask a pharmacist first about your other medicines and health conditions.
2. Try one herb at a time, so you know what is helping or causing side effects. Multi-herb “sleep blends” make this hard.
3. Choose third-party tested products, such as those carrying a USP or NSF seal, and follow the label.
4. Don’t drive or use stairs carelessly until you know how it affects you the next morning.
5. Set a time limit. If sleep has not improved after a few weeks, stop and look for the underlying cause.

What helps more than any herb

For sleep problems that last, cognitive behavioral therapy for insomnia (CBT-I) has stronger evidence than any herb or supplement and is the first treatment sleep specialists recommend. A steady wake-up time, morning daylight, an early caffeine cutoff and less evening alcohol support it. Our guide to alternatives to melatonin compares these options side by side.

Herbs you swallow, and herbs you wear

Almost every herbal sleep aid is something you swallow: a capsule, tincture or tea. In northern China, for example, a gentle evening tea is brewed from the leaves of the wild jujube (sour jujube leaf tea, 酸枣叶茶), whose seed is the best-known sleep herb in Chinese medicine; our guide to herbal tea for sleep covers it alongside chamomile and other bedtime teas. Traditional Chinese Medicine also has a long tradition of applying herbs externally, including at the navel, a point known as Shenque. This is a traditional practice; how it might work is not established by modern research.

SleepDeep’s overnight routine follows that tradition: a sealed dry-herb pouch worn at the navel with a belt. Nothing is swallowed and it contains no melatonin. This describes the format; it does not establish treatment of insomnia, greater safety than other options, or suitability alongside every medicine, and it does not replace care from your doctor.

Use only on intact skin, check it regularly and stop for irritation. Keep the pouch intact; do not swallow or brew its contents or apply heat. Ask the clinician or pharmacist who knows your medicines about suitability, particularly with pregnancy, breastfeeding, complex illness or herbal allergies. Five Essences’ selected practice observations describe individual experiences and do not establish causation or a response rate; the evidence overview explains their limits.

When to see a doctor

See a doctor if poor sleep lasts more than a few weeks or affects your mood, work or driving, or if you snore loudly, gasp or stop breathing in your sleep. Talk to your prescriber before stopping any sleep medicine in favor of an herb; stopping suddenly can cause rebound insomnia or withdrawal. Seek urgent care for yellowing skin or eyes, a serious allergic reaction, confusion or thoughts of self-harm.

Questions about herbs for sleep

What is the strongest herb for sleep?

Valerian is the most studied, but even its evidence is inconsistent. “Stronger” also tends to mean more side effects and more risk with other sedating products, so the strongest herb is rarely the best choice.

Are herbal sleep aids safer than sleeping pills?

Not automatically. Some are mild, but some carry liver risks, interact with medicines or add to drowsiness. They are also less tested than prescription medicines. Compare both with a pharmacist, and see our guide on whether sleeping pills are bad for you.

Can I take herbs for sleep every night?

Long-term safety is unknown for most sleep herbs. If you find you need one every night for weeks, it is worth looking for the cause of the sleep problem with a clinician.

Which herbs help with sleep and anxiety?

Passionflower, lavender and chamomile are often used for both, but evidence is limited. If anxiety is affecting your sleep, a doctor or mental-health professional can help with treatments that are well proven. In the U.S., call or text 988 if you are in crisis.

Independent sources

National Center for Complementary and Integrative Health: Natural products for sleep · NCCIH: Passionflower · NCCIH: Lavender · NICHD: Do natural products help people sleep? · National Heart, Lung, and Blood Institute: Insomnia treatment and CBT-I

General education; ask your own doctor or pharmacist before starting any herbal product.