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Magnolia Bark

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Magnolia Bark. GABAergic anxiolytic bark extract used for sleep and stress.

How it works. Honokiol/magnolol act as positive allosteric modulators at GABA-A and reduce cortisol.

What the research supports. 1 graded claims. Strongest: Reduces perceived stress and improves sleep quality (moderate).

How much to take. Typical dose: 200–400 mg standardized extract.

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with Magnesium glycinate, L-theanine.

Common forms. Available as Standardized extract capsule, Liquid tincture (alcohol or glycerin), Powdered whole herb, Traditional decoction or tea.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Magnolia Bark. Anecdotes are not medical advice.

Magnolia Bark. GABAergic anxiolytic bark extract used for sleep and stress.

Key compound: honokiolC18H18O2 · 266.3 g/mol

What it is

GABAergic anxiolytic bark extract used for sleep and stress.

Also called

HonokiolMagnolol

Food sources

Whole dried plant material (root, leaf, flower, or aerial parts depending on the species)Standardized hydroethanolic or aqueous extract (capsule, tincture, or tea)Powdered traditional preparation used in Ayurvedic, TCM, or Western herbal practice

Goals

Sleep & RecoveryMood & Anxiety

How it works

Honokiol/magnolol act as positive allosteric modulators at GABA-A and reduce cortisol.

Pathways

  • Honokiol/magnolol act as positive allosteric modulators at GABA-A
  • reduce cortisol

Effects

  • ↓perceived stress and improves sleep quality decreases

What the research supports

Reduces perceived stress and improves sleep qualitymoderate

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
200–400 mg standardized extract
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodEvening
Best formMost evidence is based on the standardized extract capsule form.
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Side effects & interactions

Common side effects

  • Drowsiness

Medication interactions

CNS depressantsmoderate

Additive sedation.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

Common forms

  • Standardized extract capsule
  • Liquid tincture (alcohol or glycerin)
  • Powdered whole herb
  • Traditional decoction or tea

Key studies

8 studies cited in total.

PubMed: Magnolia Bark — Reduces perceived stress and improves sleep quality ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Magnolia Bark and "Reduces perceived stress and improves sleep quality". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Magnolia Bark — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Magnolia Bark and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Magnolia Bark — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Magnolia Bark and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

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