Overview
GABAergic anxiolytic bark extract used for sleep and stress.
- 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
- Standardized extract capsule
- Liquid tincture (alcohol or glycerin)
- Powdered whole herb
- Traditional decoction or tea
Mechanism of action
Honokiol/magnolol act as positive allosteric modulators at GABA-A and reduce cortisol.
- · Honokiol/magnolol act as positive allosteric modulators at GABA-A
- · reduce cortisol
Effects on the body
Organ system effects
Magnolia Bark promotes parasympathetic tone, GABAergic signaling, or melatonergic pathways that facilitate sleep onset and quality.
Evidence-based benefits
Reduces perceived stress and improves sleep quality
Moderate evidencePotential side effects
- · Drowsiness
Drug interactions
Safety & non-supplemental interactions
Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.
- ·Pregnant or breastfeeding (insufficient safety data)
- ·Children under 18 (unless directed by a clinician)
- ·Alcohol, benzodiazepines, opioids, sedating antihistamines (additive CNS depression)
Supplement interactions
- Magnesium glycinateComplementary GABAergic calming and improved sleep architecture.
- L-theanineReduces sleep latency without sedation.
No specific avoidances listed.
Dosing & bioavailability
Where to buy
Affiliate links — we may earn a commission at no extra cost to you. Amazon code supplementsch-20 is auto-applied at checkout. We don't endorse specific brands; verify third-party testing (USP, NSF, Informed Sport) before purchase.
Third-party testedIndependently verified Magnolia Bark — look for USP, NSF, or Informed Sport seals on the label for purity and dose accuracy.Magnolia Bark third party tested NSF
CapsulesPre-measured Magnolia Bark capsules — easiest for travel and consistent daily dosing without scoops or scales.Magnolia Bark capsules
PowderBulk unflavored Magnolia Bark powder — best cost-per-gram and flexible dosing for stacking or mixing into drinks.Magnolia Bark powder unflavored
Best sellersMost-purchased Magnolia Bark products on Amazon — a quick way to see what's reviewed widely before you commit.Magnolia Bark best sellerScientific evidence8Show studiesHide studies
Magnolia/phellodendron in stress
Talbott SM, et al.
DB-RCT in 56 stressed adults.
Significant cortisol and mood improvement vs placebo over 4 weeks.
PubMed: Magnolia Bark — Reduces perceived stress and improves sleep quality
Live PubMed search
Live results for "Magnolia Bark Reduces perceived stress and improves sleep quality" across the PubMed/MEDLINE peer-reviewed index.
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
Live PubMed search
Live results for "Magnolia Bark randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.
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
Live PubMed search
Live results for "Magnolia Bark meta-analysis" across the PubMed/MEDLINE peer-reviewed index.
Opens current human and preclinical literature matching Magnolia Bark and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.
PubMed: Magnolia Bark — pharmacokinetics
Live PubMed search
Live results for "Magnolia Bark pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.
Opens current human and preclinical literature matching Magnolia Bark and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.
PubMed: Magnolia Bark — safety adverse events
Live PubMed search
Live results for "Magnolia Bark safety adverse events" across the PubMed/MEDLINE peer-reviewed index.
Opens current human and preclinical literature matching Magnolia Bark and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.
PubMed: Magnolia Bark — dose response
Live PubMed search
Live results for "Magnolia Bark dose response" across the PubMed/MEDLINE peer-reviewed index.
Opens current human and preclinical literature matching Magnolia Bark and "dose response". Filter by RCT, meta-analysis, or year on the results page.
Google Scholar: Magnolia Bark — clinical evidence
Live Scholar search
Cross-database citation index for Magnolia Bark as it relates to "clinical evidence".
Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.