7 Natural Supplements for Anxiety: What the Evidence Actually Says

Natural supplements for anxiety are everywhere.

Some are backed by research.

Others have only weak or early evidence.

That difference is important to know.

Anxiety can feel like racing thoughts, tight muscles, worry, poor sleep, or feeling “wired but tired.”

A supplement may help some people with mild stress symptoms.

But supplements are not a replacement for therapy or medical care when anxiety is strong or lasts a long time.

The goal is not to find the trendiest product.

It is to understand what the evidence actually says.

Can Natural Supplements Really Help Anxiety?

Some supplements may help with stress or mild anxiety symptoms.

But results are mixed.

Many studies are small or short.

Some products also use special extracts that are not the same as every bottle sold in stores.

The National Center for Complementary and Integrative Health reminds people that “natural” does not always mean safe.

Supplements can cause side effects.

They can also change how prescription medicines work.

That is why it is important to tell your pharmacist or doctor what you take.

Pharmacist’s Note

Do not stop a prescribed anxiety or antidepressant medicine to switch to a supplement on your own.

Some herbs can interact with antidepressants, birth control, blood thinners, thyroid medicine, sleep medicine, and other drugs.

A pharmacist can help check for problems before you add something new.

7 Natural Supplements for Anxiety With Research Behind Them

1. Ashwagandha for Stress and Anxiety

Ashwagandha is an herb often called an adaptogen.

An adaptogen is a plant that may help the body handle stress.

Ashwagandha may affect the body’s stress system and cortisol.

Cortisol is a hormone that rises during stress.

The evidence is promising, but it is not perfect.

Most studies lasted only several weeks.

Ashwagandha can also affect thyroid hormones.

Rare liver problems have been reported.

It should not be treated as a harmless calming herb.

Best fit: stress-heavy anxiety, especially when worry and poor sleep happen together.

2. Magnesium for Anxiety and Poor Sleep

Magnesium is a mineral your nerves and muscles need.

It helps control many signals in the brain.

Low magnesium levels have been linked with stress and anxiety symptoms.

Some studies used magnesium with other ingredients, which makes it hard to know what caused the benefit.

Magnesium may make the most sense when anxiety comes with:

• muscle tension
• poor sleep
• low magnesium intake
• certain health conditions that lower magnesium

People with kidney problems need extra caution.

For more on sleep, read Can Magnesium Really Help You Sleep?.

3. L-Theanine for Stress and a Busy Mind

L-theanine is an amino acid found naturally in tea.

It is often studied for calm focus.

Unlike stronger sedating herbs, it usually does not make people feel heavily sleepy.

A review of L-theanine research found signs that it may lower stress and support a calmer mental state.

The strongest evidence is for short-term stress.

There is less research on long-term diagnosed anxiety disorders.

Best fit: moments when your mind feels too busy or tense, especially during the day.

4. Oral Lavender for General Anxiety

Lavender is often thought of as a scent.

But some of the strongest anxiety research uses a special oral lavender extract called Silexan.

That is different from smelling lavender oil.

Possible side effects include stomach upset and lavender-tasting burps.

Best fit: ongoing anxious feelings or restlessness.

Among natural options, oral lavender has one of the stronger research records.

5. Valerian Root for Anxiety and Sleep

Valerian is an herb often used for sleep.

It may affect GABA, a brain chemical linked with calm and relaxation.

The evidence for anxiety is weaker than the evidence for sleep.

Some people may find it helpful when anxiety mostly appears at bedtime.

Valerian can cause sleepiness.

It may also add to the effects of alcohol, sleep medicines, or other sedating drugs.

Best fit: anxiety that mainly shows up as trouble falling asleep.

6. Passionflower for Mild Anxiety

Passionflower has a long history of use for calm and sleep.

It may also affect GABA in the brain.

That means passionflower may help some people, but we need better studies.

It can also cause drowsiness.

Best fit: mild anxiety when you want an herbal option with some research behind it.

7. Saffron for Anxiety and Low Mood

Saffron is a spice made from the Crocus sativus flower.

It has been studied for both mood and anxiety symptoms.

A review study found improvements in both anxiety and depression symptoms.

The results were encouraging.

But the researchers also noted limits in the available studies.

Some trials were small, and many came from similar regions.

Saffron may be especially interesting when anxiety and low mood happen together.

It may also be relevant when mood symptoms change around the menstrual cycle.

Read What Is PMDD? for more on strong premenstrual mood symptoms.

Best fit: anxiety that happens with low mood or cycle-related emotional symptoms.

Which Natural Supplements for Anxiety Have the Best Evidence?

Not every supplement on this list has the same level of research.

Here is a simple comparison.

The strongest choice depends on what you are trying to improve.

A supplement for daytime stress may not be the best choice for bedtime anxiety.

That is why matching the product to your symptoms matters.

Can You Combine Anxiety Supplements?

Taking several calming supplements together does not always mean better results.

It can increase side effects.

For example, combining several products that cause drowsiness may leave you too sleepy or dizzy.

Some herbs can also change how prescription medicines work.

The NCCIH guidance on anxiety and complementary approaches recommends discussing supplements with a healthcare professional, especially when you take other medicines.

A safer approach is to avoid stacking multiple products on your own.

Keep a list of everything you take, including teas, gummies, powders, and capsules.

Share that list with your pharmacist.

Natural Does Not Always Mean Safe

Some popular “natural” products deserve extra caution.

1. St. John’s Wort

St. John’s Wort can interact with many medicines.

It may affect antidepressants, birth control, blood thinners, and other drugs.

That makes it a poor choice for casual self-treatment.

2. Kava

Kava has been linked with serious liver problems.

The NIH LiverTox database describes reports of liver injury linked with kava products.

3. Ashwagandha

Ashwagandha may affect thyroid hormones.

Rare liver problems have also been reported.

4. Valerian

Valerian can increase sleepiness when mixed with other sedating medicines.

The safest rule is simple:

Tell your pharmacist about every supplement you use.

When Anxiety Needs More Than a Supplement

Supplements may support mild stress or occasional anxiety.

They should not be your only plan when anxiety is affecting daily life.

Talk with a healthcare professional if anxiety:

• happens most days
• keeps you from sleeping
• affects school, work, or relationships
• causes frequent panic
• keeps getting worse
• makes normal activities hard

Therapy can help.

Cognitive behavioral therapy, also called CBT, is one of the best-studied treatments for anxiety.

Prescription medicine may also be appropriate for some people.

A supplement is not automatically safer or better just because it is natural.

A Helpful Next Step

Anxiety and sleep often affect each other.

Poor sleep can make worry feel stronger the next day.

And anxiety can make it harder to fall asleep at night.

Track your sleep, stress, and symptoms for one week.

This may help you notice whether anxiety gets worse after poor sleep, during certain parts of your cycle, or during stressful days.

You can also read:

• 7 Natural Sleep Aids That Actually Work
• Sleep Problems in Women
• Why Am I Always Tired?

The Bottom Line

Some natural supplements for anxiety have better evidence than others.

Oral lavender, L-theanine, saffron, and ashwagandha have some of the strongest research.

Magnesium may also help when poor sleep or low magnesium is part of the picture.

Valerian and passionflower have weaker or more mixed evidence.

The most important point is safety.

Natural products can still cause side effects and medication interactions.

Use evidence, not marketing, to guide your choices.

Medical Disclaimer

This article is for education only.

It is not medical advice, diagnosis, or treatment.

Supplements can interact with medicines and health conditions.

Talk with a qualified healthcare professional before starting, stopping, or combining supplements or prescription medicines.

About the Author

Lauretta Iyamu, PharmD, is a Women’s Health Medical Writer and Clinical Researcher.

She helps women understand medicines, menopause, sleep, fertility, and other health topics in clear, simple language.

Her goal is to turn health research into useful information you can understand and use when talking with your healthcare team.

References

1. 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://pmc.ncbi.nlm.nih.gov/articles/PMC3573577/
2. Salve, J., Pate, S., Debnath, K., & Langade, D. (2019). Adaptogenic and anxiolytic effects of ashwagandha root extract in healthy adults: A double-blind, randomized, placebo-controlled clinical study. Cureus, 11(12), e6466. https://pmc.ncbi.nlm.nih.gov/articles/PMC6979308/
3. Majeed, M., Nagabhushanam, K., & Mundkur, L. (2023). A standardized ashwagandha root extract alleviates stress, anxiety, and improves quality of life in healthy adults by modulating stress hormones. Medicine, 102(41), e35521. https://pmc.ncbi.nlm.nih.gov/articles/PMC10578737/
4. National Institutes of Health, Office of Dietary Supplements. (n.d.). Ashwagandha: Is it helpful for stress, anxiety, or sleep? https://ods.od.nih.gov/factsheets/Ashwagandha-HealthProfessional/
5. Boyle, N. B., Lawton, C., & Dye, L. (2017). The effects of magnesium supplementation on subjective anxiety and stress—A systematic review. Nutrients, 9(5), 429. https://pmc.ncbi.nlm.nih.gov/articles/PMC5452159/
6. National Institutes of Health, Office of Dietary Supplements. (n.d.). Magnesium: Fact sheet for health professionals. https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/
7. Lopes Sakamoto, F., Metzker Pereira Ribeiro, R., Amador Bueno, A., & Oliveira Santos, H. (2019). Psychotropic effects of L-theanine and its clinical properties. Pharmacological Research, 147, 104395. https://pubmed.ncbi.nlm.nih.gov/31412272/
8. Möller, H.-J., Volz, H.-P., Dienel, A., Schläfke, S., & Kasper, S. (2019). Efficacy of Silexan in subthreshold anxiety: Meta-analysis of randomised, placebo-controlled trials. European Archives of Psychiatry and Clinical Neuroscience, 269(2), 183–193. https://pmc.ncbi.nlm.nih.gov/articles/PMC6726711/
9. Yap, W. S., Dolzhenko, A. V., Jalal, Z., Hadi, M. A., & Khan, T. M. (2019). Efficacy and safety of lavender essential oil (Silexan) capsules among patients suffering from anxiety disorders: A network meta-analysis. Scientific Reports, 9, 18042. https://pmc.ncbi.nlm.nih.gov/articles/PMC6889391/
10. Shinjyo, N., Waddell, G., & Green, J. (2020). Valerian root in treating sleep problems and associated disorders—A systematic review and meta-analysis. Journal of Evidence-Based Integrative Medicine, 25, 2515690X20967323. https://pmc.ncbi.nlm.nih.gov/articles/PMC7585905/
11. Akhondzadeh, S., Naghavi, H. R., Vazirian, M., Shayeganpour, A., Rashidi, H., & Khani, M. (2001). Passionflower in the treatment of generalized anxiety: A pilot double-blind randomized controlled trial with oxazepam. Journal of Clinical Pharmacy and Therapeutics, 26(5), 363–367. https://pubmed.ncbi.nlm.nih.gov/11679026/
12. Janda, K., Wojtkowska, K., Jakubczyk, K., Antoniewicz, J., & Skonieczna-Żydecka, K. (2020). Passiflora incarnata in neuropsychiatric disorders—A systematic review. Nutrients, 12(12), 3894. https://pmc.ncbi.nlm.nih.gov/articles/PMC7766837/
13. Marx, W., Lane, M., Rocks, T., Ruusunen, A., Loughman, A., Lopresti, A., Marshall, S., Berk, M., & Jacka, F. (2019). Effect of saffron supplementation on symptoms of depression and anxiety: A systematic review and meta-analysis. Nutrition Reviews, 77(8), 557–571. https://pubmed.ncbi.nlm.nih.gov/31135916/
14. National Center for Complementary and Integrative Health. (n.d.). Anxiety and complementary health approaches. https://www.nccih.nih.gov/health/anxiety-at-a-glance
15. National Institute of Diabetes and Digestive and Kidney Diseases. (n.d.). Kava kava. In LiverTox: Clinical and research information on drug-induced liver injury. National Library of Medicine. https://www.ncbi.nlm.nih.gov/books/NBK548637/