Several supplements have evidence for anxiety symptom reduction, though effects are typically modest compared to evidence-based therapy and medication. Best supplements for anxiety includes options with reasonable evidence and several with limited support. This guide covers what’s actually supported. For significant anxiety, evidence-based treatment (CBT, medication) typically outperforms supplements. Always discuss with your healthcare provider.
Supplements with reasonable evidence
Magnesium: Some evidence for anxiety reduction, particularly with deficiency. Glycinate or citrate forms preferred. 200-400 mg daily.
L-theanine: Amino acid found in tea. Some evidence for relaxation without sedation. 100-400 mg.
Ashwagandha: Adaptogen with reasonable evidence for stress and anxiety. 300-600 mg of root extract daily.
Lavender (oral preparation Silexan): Some evidence for generalized anxiety. 80 mg daily.
Omega-3 fatty acids: Some evidence for anxiety, particularly higher EPA preparations.
Supplements with limited evidence
- Kava: some evidence but liver toxicity concerns
- Valerian: mostly studied for sleep
- Passionflower: limited evidence
- CBD: emerging evidence; quality control concerns
- Probiotics: gut-brain axis research developing
What doesn’t have good evidence
- Most “anxiety blends” with multiple ingredients
- 5-HTP (concerns about quality and serotonin syndrome with antidepressants)
- GABA supplements (poor absorption, doesn’t cross blood-brain barrier well)
- Most mushroom supplements
When to seek treatment beyond supplements
- Anxiety significantly affecting function
- Panic attacks
- Avoidance behaviors
- Sleep severely affected
- Thoughts of self-harm
Cognitive-behavioral therapy and SSRIs have substantially stronger evidence than any supplement.
Frequently Asked Questions
Will supplements replace anxiety medication?
Generally no for moderate-severe anxiety. May be helpful adjuncts.
Are supplements safe to combine with medications?
Discuss with prescriber. Some interactions possible (e.g., 5-HTP with SSRIs).
How long until supplements work?
Typically 2-8 weeks for noticeable effects.
Is L-theanine worth trying?
Reasonable for mild anxiety. Generally safe.
What about cannabis or CBD?
Emerging evidence; quality control issues with OTC CBD products. Discuss with provider.
The bottom line on supplements for anxiety
Several supplements have modest evidence for anxiety. Effects typically smaller than evidence-based treatments. For significant anxiety, professional treatment recommended. Discuss with healthcare provider before starting supplements, especially if on medications.