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Mood/Sleep

Magnolia Bark

Herbal extract from Magnolia officinalis used for stress and sleep, with limited evidence for anxiety and cortisol reduction in stressed adults.

Magnolia Bark
40
score
C
evidence
Caution
risk

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Quick Take

Worth considering only for mild stress or sleep issues after basic lifestyle fixes; evidence is limited and often from blends.

Magnolia bark comes from Magnolia officinalis, whose bark is used in traditional Chinese medicine and sold mainly as an extract. Its key bioactives, honokiol and magnolol, modulate GABA-A receptors and may dampen stress signaling through the HPA axis. Small human trials suggest modest benefits for anxiety, sleep, and salivary cortisol in stressed adults, although many studies use proprietary blends with Phellodendron. It is most relevant for people with mild stress or sleep complaints looking for a non-prescription botanical.

Potential benefits

01
May reduce stress and anxiety
02
May improve sleep quality
03
May lower cortisol levels

Protocol

Amount
200-400 mg
Frequency
Once or twice daily
When
Evening or 30-60 minutes before bed for sleep; can split dose morning and evening for stress.

Onset Time

Acute sedation within 1 hour; stress benefits may take 1-2 weeks.

Who Should Consider

Adults with mild stress or anxiety
People with sleep-onset difficulty
Adults seeking a non-prescription calming botanical

How It Works

Honokiol and magnolol cross the blood-brain barrier and positively modulate GABA-A receptor activity, which can produce mild sedative and anxiolytic effects. They also inhibit NF-κB signaling and inflammatory cytokines in preclinical models, and may blunt cortisol spikes via HPA-axis modulation.

Updated 5/19/2026

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