Written by Charles Gumbley, BHSc (Clinical Nutrition), DipHSc (Western Herbal Medicine)
Last evidence check: 19 July 2026
This content is for general educational purposes only and is not intended as personalised medical advice. If you have specific health concerns, are taking medication, or are pregnant or breastfeeding, please consult a qualified healthcare professional before starting any new supplement.
Urgent support: If you or someone you know is in immediate danger of self-harm or harming someone else, call triple zero (000). For crisis support in Australia, call Lifeline on 13 11 14.
Key takeaways
- No universal best supplement for anxiety has been established.
- Everyday stress, anxiety symptoms and an anxiety disorder are different clinical questions.
- Evidence for magnesium, omega-3 fatty acids, B vitamins, L-theanine and herbs is mixed or limited.
- Natural products can interact with prescription medications and may have serious adverse effects.
- Psychological care, including cognitive behavioural therapy, and prescribed care should not be displaced by a retail supplement list.
Conflict disclosure: Nutrition Market sells supplements. This guide does not rank brands, and all commercial product feeds remain disabled during clinical review.
Anxiety evidence: what can it support?
A universal ranked list cannot be supported because the evidence varies by ingredient, preparation, population and outcome.
Some trials report a reduction in anxiety scores, but many are small, short or study people under temporary stress rather than people with a diagnosed condition. A systematic review of complementary approaches for generalised anxiety disorder found limited evidence for most methods, substantial variation between kava trials and poor safety reporting.¹
As a clinical nutritionist, my first question is not which remedy is most popular. It is whether the person is describing short-term stress, persistent anxiety symptoms, a possible nutritional inadequacy, a medicine effect or a condition needing mental-health assessment.
For people trying to manage anxiety, the practical aim should not be to turn an uncertain finding into a product promise. Some dietary supplements may address an identified deficiency, but that differs from being shown to reduce anxiety symptoms. Claims that natural remedies “help reduce anxiety” should be treated cautiously. Trials measuring stress levels or anxiety levels are not automatically clinically meaningful, and more research is needed.
How to read research and marketing language: A study may say participants “reported less anxiety”, record a lower level of anxiety or find a short-term reduction in anxiety symptoms. That is not the same as proving a product can treat anxiety. Results in mild anxiety or state anxiety after a laboratory stressor may not transfer to people with anxiety and insomnia, depression and anxiety, or a diagnosed disorder. Phrases such as “supplements can help”, “may help with anxiety”, “natural treatments” and “help relieve anxiety” require the same scrutiny. Marketing may also group herbal remedies and natural remedies for anxiety as supplements that may help, but the wording itself is not evidence.
Choosing the right supplements, if any, begins with checking medicines, diet, risk factors and goals. Many supplements combine ingredients, while caffeine or stimulant ingredients can contribute to anxiety. Trials examining stress and sleep do not necessarily test treatments for anxiety symptoms.
Anxiety symptoms are not one clinical question
Symptoms of anxiety can arise in different anxiety disorders and can also occur with sleep loss, caffeine, medicine changes, thyroid problems, depression or stressful events.
Scroll sideways to read the full table →
| Situation | What it may mean | Safer next step |
|---|---|---|
| Brief worry before a difficult event | A normal stress response | Basic self-care and stress-management techniques may be enough |
| Ongoing worry affecting daily life | Possible anxiety condition or another health issue | Talk with a GP or mental health professional |
| Sudden morning anxiety | Several possible psychological, sleep, medicine or physical contributors | Seek assessment rather than self-selecting medication or supplements |
| Tingling, palpitations or breathlessness | Anxiety is one possibility, but physical causes also need consideration | Use Healthdirect or a clinician to assess urgency |
Healthdirect advises professional help when symptoms affect everyday life. It lists lifestyle measures, psychological therapy and medicines as established care options.² Anxiety and depression can occur together.
Magnesium and anxiety: limited and mixed evidence
Magnesium is an essential mineral, but current evidence does not establish magnesium supplements as a standalone treatment for anxiety.
A 2024 systematic review found that several intervention studies reported improved self-rated anxiety or sleep, particularly in people with low magnesium status, but the studies differed in design, dose, population and combined ingredients.³ This means magnesium may be relevant when intake is inadequate, not that it reliably helps reduce anxiety in everyone.
Check the complete label before combining products. Magnesium formulas often contain vitamin B6, and total B6 can add up across magnesium, zinc, multivitamin and anti-stress products. The TGA has linked supplementary vitamin B6 with peripheral neuropathy and strengthened Australian safety controls.⁴
Omega-3 fatty acids and anxiety research
Omega-3 fatty acids have been studied for anxiety outcomes, but the findings do not support a universal omega-3 supplement recommendation.
A 2018 meta-analysis reported an association between omega-3 use and lower anxiety symptom severity across varied clinical and non-clinical groups. One included study was later retracted. A 2023 reanalysis excluding that study found a smaller overall association, while two previously significant subgroup findings were no longer significant.⁵ ¹⁴ The authors called for better-designed studies in populations where anxiety was the main symptom. Taking omega-3 supplements can also require a medicine and bleeding-risk check, especially before surgery or with anticoagulant or antiplatelet medicines.
Food intake, dose, EPA and DHA composition, health conditions and concurrent care all affect interpretation.
Vitamin B and identified nutritional gaps
Vitamin B supplementation is most defensible when diet, risk factors or testing identify a nutritional need.
A meta-analysis of B-complex trials found a small effect on stress but no pooled effect on anxiety.⁶ A single vitamin B6 trial cannot override the wider evidence or the Australian safety concern about cumulative B6 exposure. High intake can cause tingling, burning or numbness associated with peripheral neuropathy.⁴
Vitamin D deficiency, iron deficiency, thyroid disease and other conditions can contribute to symptoms that resemble or worsen fatigue, low mood or anxiety. Testing and clinical context matter more than adding several products at once. B vitamins should not be presented as a natural treatment for a diagnosed anxiety disorder.
Natural supplements and herbal medicine safety
Natural supplements and herbal medicine can cause adverse effects and clinically important medicine interactions.
Evidence for medicinal herbs is preparation-specific and preliminary. A 2022 network meta-analysis found signals for some standardised preparations, while results for passionflower, saffron, chamomile and L-theanine were uncertain or not statistically convincing.⁷ A July 2026 meta-analysis of 31 L-theanine trials found inconsistent, non-significant anxiety effects overall, apart from one study in psychotic anxiety.⁸
Ashwagandha requires current safety context. The TGA reported further possible liver-injury cases in its 2026 update and continues to assess the evidence.⁹ Kava has also carried Australian liver warnings. St John’s wort can reduce the effect of medicines including hormonal contraception, warfarin and transplant medicines, and it may interact with serotonergic antidepressants.¹⁰
People who are pregnant or breastfeeding, have liver disease or bipolar disorder, take regular medicines, or have surgery planned should consult a healthcare provider or pharmacist before using a herbal supplement.
My professional approach is to review the complete medicine and supplement list before discussing any new ingredient. Interactions, duplicated nutrients and cumulative doses can matter more than whether a product is marketed as natural.
Stress and anxiety versus an anxiety disorder
Stress and anxiety are related experiences, but a diagnosed anxiety disorder is defined by symptoms, distress, duration and effects on daily functioning.
Cortisol is often called a stress hormone, yet a single cortisol claim cannot identify the cause of feelings of anxiety or determine which supplement is suitable. Products marketed to manage stress and anxiety may rely on studies of healthy adults facing a short laboratory stressor. Those results cannot automatically be applied to panic disorder, social anxiety or generalised anxiety disorder.
Healthdirect and Beyond Blue identify cognitive behavioural therapy and other psychological care as central evidence-based options, alongside sleep, reduced excess caffeine and appropriate self-care.² ¹¹
Treatment for anxiety: where supplements fit
Evidence-based care may include psychological therapy, lifestyle support and, when clinically appropriate, prescribed medicine.
Supplements do not replace assessment, CBT or prescribed care. Healthdirect advises people taking anxiety medicines to tell their doctor or pharmacist about herbal, complementary and over-the-counter products because interactions can change safety or medicine effects.¹² Do not stop or change prescription medications without the prescriber’s advice.
Talk with a GP or mental health professional if worry is hard to control, causes avoidance, disrupts sleep or work, or persists most days. Seek prompt help if symptoms worsen, depression symptoms appear, or alcohol or other substances are being used to cope.
Anxiety relief in Australia: check labels and AUST numbers
Claims about relief on Australian complementary medicines should be checked against the label, evidence and the product’s AUST number.
Most therapeutic goods sold in Australia should display AUST L, AUST L(A) or AUST R. The TGA explains that listed medicines are generally lower risk and are not evaluated in the same way as registered prescription medicines before sale.¹³ An AUST number does not prove a product is the best choice or that its claim applies to you.
Before choosing a product, check:
- every active ingredient and the total daily dose
- duplicate vitamin B6, magnesium or herbal ingredients across products
- pregnancy, liver, bleeding, sedation and surgery warnings
- interactions with antidepressants, sedatives, anticoagulants and hormonal contraception
- whether the study population and preparation match the advertised claim
Questions about supplements and anxiety
What are the most effective supplement options?
No supplement is established as the most effective option for everyone. Magnesium, omega-3, selected herbs and other ingredients have mixed or preparation-specific findings. The better question is whether an identified nutritional need exists and whether symptoms require psychological or medical care.
How do I stop being anxious all the time?
Constant anxiety deserves assessment rather than a supplement-only answer. A GP or mental health professional can check the pattern, severity, physical contributors and different treatment options. If anxiety is affecting daily life, seeking help early is appropriate.
What medication is used for morning anxiety?
Medication for morning anxiety cannot be selected safely without knowing the cause and diagnosis. Sleep, caffeine, alcohol, medicine timing, depression, panic and physical health can contribute. Discuss persistent morning symptoms with the clinician who knows your history.
How can I calm overthinking and anxiety?
Slow breathing, grounding attention in the present and reducing excess caffeine may help in the moment. Persistent overthinking may respond to structured psychological strategies such as CBT. Seek professional support when it is hard to control or causes distress or avoidance.
Can magnesium supplements help with anxiety?
Magnesium may be relevant when intake or status is low, but research is too varied to promise anxiety relief. Check elemental magnesium, kidney health, medicine interactions and added vitamin B6 before use.
Which anxiety supplements should I avoid with medicines?
St John’s wort is a major interaction concern, and sedating herbs can add to the effects of alcohol, sleep medicines or other sedatives. Antidepressants, hormonal contraception, anticoagulants and many other medicines warrant a pharmacist check before any herbal product is added.
References
- Baric H, Dordevic V, Cerovecki I, Trkulja V. Complementary and Alternative Medicine Treatments for Generalized Anxiety Disorder: Systematic Review and Meta-analysis of Randomized Controlled Trials. Advances in Therapy. 2018;35(3):261-288. doi:10.1007/s12325-018-0680-6. PubMed
- Healthdirect Australia. Anxiety. Healthdirect
- Rawji A, Peltier MR, Mourtzanakis K, et al. Examining the Effects of Supplemental Magnesium on Self-Reported Anxiety and Sleep Quality: A Systematic Review. Cureus. 2024;16(4):e59317. doi:10.7759/cureus.59317. PubMed
- Therapeutic Goods Administration. Medicines containing vitamin B6 (pyridoxine, pyridoxal or pyridoxamine). TGA
- Su KP, Tseng PT, Lin PY, et al. Association of Use of Omega-3 Polyunsaturated Fatty Acids With Changes in Severity of Anxiety Symptoms: A Systematic Review and Meta-analysis. JAMA Network Open. 2018;1(5):e182327. doi:10.1001/jamanetworkopen.2018.2327. PubMed
- Young LM, Pipingas A, White DJ, Gauci S, Scholey A. A Systematic Review and Meta-Analysis of B Vitamin Supplementation on Depressive Symptoms, Anxiety, and Stress. Nutrients. 2019;11(9):2232. doi:10.3390/nu11092232. PubMed
- Zhang W, Yan Y, Wu Y, et al. Medicinal herbs for the treatment of anxiety: A systematic review and network meta-analysis. Pharmacological Research. 2022;179:106204. doi:10.1016/j.phrs.2022.106204. PubMed
- Gerolymos C, Saddier E, Boyer L, Fond G. Cognitive and affective effects of L-Theanine: a systematic review and meta-analysis of 31 randomized trials. Molecular Psychiatry. 2026. doi:10.1038/s41380-026-03727-9. PubMed
- Therapeutic Goods Administration. Withania somnifera (Ashwagandha) and very rare risk of liver injury. TGA
- Therapeutic Goods Administration. St John’s Wort: important interactions with prescription medicines. TGA
- Beyond Blue. Treatments for anxiety. Beyond Blue
- Healthdirect Australia. Medicines for anxiety. Healthdirect
- Therapeutic Goods Administration. Understanding complementary medicines. TGA
- JAMA Network Open. Reanalysis After Retraction of Included Article. JAMA Network Open. 2023;6(4):e2310754. doi:10.1001/jamanetworkopen.2023.10754. Correction notice and reanalysis
