Mental Wellness Supplements: Mood, Stress, Anxiety

Where supplements fit

Supplements can play a modest role for everyday stress, mild anxiety, occasional sleep difficulty, or general wellness. They do not replace evidence based mental health treatment for diagnosable conditions including major depression, anxiety disorders, bipolar disorder, PTSD, or others.

Patients with persistent symptoms affecting daily functioning, with thoughts of self harm, or with significant impairment should be evaluated by a clinician. If you or someone you know is in crisis, call or text 988, the Suicide and Crisis Lifeline.

What has reasonable evidence

L theanine

An amino acid from tea. Promotes a state of calm alertness without sedation. Modest evidence for reducing acute stress responses and improving subjective relaxation. Typical dose 100 to 400 mg daily. Generally safe and well tolerated.

Ashwagandha

An adaptogenic herb. Several studies show modest reductions in stress and cortisol, with some evidence for sleep and anxiety. Typical dose 300 to 600 mg of a standardized extract daily.

Considerations:

• Generally well tolerated.
• Can affect thyroid hormone levels. Patients with thyroid conditions should use carefully.
• May interact with sedating medications, immunosuppressants, and certain other prescriptions.
• Pregnancy and breastfeeding: insufficient safety data, avoid.

Magnesium

Modest evidence for anxiety and mood, particularly in patients who are magnesium deficient. Glycinate form is preferred for relaxation effects.

Omega 3 fatty acids

Higher doses of EPA dominant fish oil have modest evidence for depressive symptoms, particularly as an adjunct to standard treatment. Effect size is small to moderate. Typical doses for mood are higher than general cardiovascular doses.

Vitamin D

Vitamin D deficiency is associated with depression and mood symptoms. Repletion in deficient patients may modestly improve mood. Not a treatment for clinical depression but worth addressing in patients with documented deficiency.

B vitamins

Adequate B vitamins, particularly folate and B12, support mood and cognitive function. Deficiency can present as depression or fatigue. Routine high dose supplementation in non deficient patients has weaker evidence.

What has weaker evidence

• Most proprietary mood blends.
• Saffron extract. Some evidence for depression, but cost and consistency are issues.
• Rhodiola. Modest evidence for fatigue and stress, mixed results.
• Most cannabidiol (CBD) products at OTC doses. Anxiety claims exceed the evidence.
• 5-HTP. Some evidence for mood, but interacts with several antidepressants and carries serotonin syndrome risk.
• Most stress relief gummies. Quality and dosing often inconsistent.

St. John’s Wort

Has evidence for mild to moderate depression in some studies. Comes with significant drug interactions including most birth control pills, many antidepressants, warfarin, immunosuppressants, and many others. Generally not recommended without clinical supervision due to the interaction profile.

Lifestyle factors that matter

• Sleep. Poor sleep affects mood and anxiety dramatically.
• Regular physical activity. Meaningful effects on mood, often comparable to mild antidepressant effects.
• Social connection. One of the strongest protective factors against depression.
• Alcohol moderation. Alcohol significantly worsens anxiety and depression over time.
• Caffeine awareness. Excessive caffeine can drive anxiety symptoms.
• Sunlight and outdoor time.
• Limiting screen time, particularly before bed.

Drug interactions to know

• St. John’s Wort affects metabolism of many medications.
• 5-HTP can produce serotonin syndrome combined with SSRIs, SNRIs, MAO inhibitors, tramadol, or certain triptans.
• Ashwagandha may interact with sedating medications and may affect thyroid function.
• L theanine and magnesium combined with sedating medications may add to sedation.

When to seek clinical help

Several patterns warrant clinical evaluation rather than continued supplement experimentation:

• Symptoms lasting more than 2 weeks and affecting daily function.
• Loss of interest in activities you used to enjoy.
• Significant sleep, appetite, or energy changes.
• Difficulty concentrating affecting work or relationships.
• Thoughts of self harm or suicide. Call 988.
• Symptoms in pregnancy or postpartum.
• Substance use as a coping mechanism.

When to talk to a pharmacist

• You are considering a supplement and take any psychiatric medication.
• You take an antidepressant and are considering St. John’s Wort or 5-HTP.
• You have a thyroid condition and are considering ashwagandha.
• You are pregnant or breastfeeding.
• You have been trying supplements without resolution.

This article is for general information only and is not a substitute for personalized medical advice. Before starting or changing any medication, including over the counter products and supplements, talk with your pharmacist or physician about your specific situation.