Magnolia Bark

Traditional Chinese medicine bark rich in honokiol and magnolol providing natural stress relief, sleep support, and neuroprotection

Scientific nameMagnolia officinalis FormulaC18H18O2 (honokiol) Molecular weight266.33 g/mol CAS35354-74-6

65 absorption score

7 safety / 10

45 USD per month

5 documented interactions

Check it against something

Evidence level C

Magnolia Bark with:

75 out of 100

Works better together Compatible. Timing differs, so follow each supplement's own window.

Check it against your whole stack →

What it does

mechanism and evidence for each claim

Stress relief and cortisol regulation

Reduces stress and helps regulate cortisol levels

Honokiol and magnolol modulate HPA axis and reduce cortisol production Evidence C-grade 2-6 weeks

Sleep quality and relaxation

Improves sleep quality and promotes natural relaxation

GABAergic activity and anxiolytic effects support better sleep Evidence C-grade 30-60 minutes before sleep, 2-4 weeks sustained

Anxiety reduction and mood support

Reduces anxiety and supports balanced mood

Modulates neurotransmitter systems including GABA and serotonin Evidence C-grade 1-4 weeks

Neuroprotection and cognitive support

Provides neuroprotective benefits and cognitive support

Antioxidant and anti-inflammatory effects protect brain tissue Evidence C-grade 4-12 weeks

Weight management and metabolic support

May support healthy weight management and metabolism

Cortisol regulation and stress reduction support healthy metabolism Evidence C-grade 8-16 weeks

Others take these for the same thing

Same goal, different mechanism — check any of them against this one

Melatonin Sleep support & circadian rhythm 0.5-3mg A 50% Ashwagandha Stress management & energy 300-600mg A 75% Magnesium Glycinate Superior absorption sleep & muscle support 200-600 mg A 90% L-Theanine Calm focus & stress relief 100-400mg B 90% Boron - Essential Trace Mineral for Bone and Hormone Health Bone health & hormone support 3-10mg daily B 85% Glycine Sleep quality & collagen support 3-10g A 95%

Every pair we checked

12 combinations scored by the engine

Magnolia Bark + Caffeine May oppose relaxation and calming effects Needs attention 58

Magnolia Bark + Creatine Monohydrate No documented interaction either way No known interaction 70

Magnolia Bark + Vitamin D3 No documented interaction either way No known interaction 70

Magnolia Bark + Calcium Carbonate No documented interaction either way No known interaction 70

Magnolia Bark + Whey Protein No documented interaction either way No known interaction 70

Magnolia Bark + Lactase No documented interaction either way No known interaction 70

Magnolia Bark + Bovine Collagen No documented interaction either way No known interaction 70

Magnolia Bark + DHA No documented interaction either way No known interaction 70

Magnolia Bark + Turmeric No documented interaction either way No known interaction 70

Magnolia Bark + Ashwagandha Enhanced stress relief and cortisol regulation Works better together 75

Magnolia Bark + L-Theanine Comprehensive relaxation without drowsiness Works better together 75

Magnolia Bark + Magnesium Oxide Enhanced muscle relaxation and sleep support Works better together 75

Dosage

Evening with meals

Daily200-800mg

Stress cortisol support200-800mg daily

Sleep support200-400mg before bedtime

Anxiety mood support200-600mg daily

Neuroprotection200-400mg daily

Before you take it

VeganYes

When to expect it

First Effects30-60 minutes for acute calming, 2-6 weeks for stress regulation

Peak Benefits8-16 weeks for sustained stress relief and cortisol regulation

Deficiency DevelopmentNot applicable - herbal supplement

Toxicity OnsetRare, mainly drowsiness with high doses

How to measure it

$100-200

MarkerCortisol levels, stress hormones, blood pressure if relevant

OptimalNormalized cortisol levels, reduced stress hormone markers

Deficient belowNot applicable for herbal supplement

FrequencyEvery 6-12 months for stress hormone monitoring

What people actually reported to the FDA

CAERS, 1 reports naming it as the suspect

Most reported effects

Fatigue 1

Tinnitus 1

Named as the suspect 1 reports of 1 that mention it at all

Serious outcome 100% hospitalisation, emergency room or worse

Disability1

Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →

What actually reaches you

The label counts the carrier, your body does not

Absorption High 65 of 100 · absorbs well relative to other forms

Delivered daily 325 mg

Cost per 100 mg delivered $0.46 comparative — uses the absorption score, not a measured percentage

Works better with

3 documented

Ashwagandha

Enhanced stress relief and cortisol regulation

Synergistic adaptogenic effects for comprehensive stress management · level C

L Theanine

Comprehensive relaxation without drowsiness

Complementary calming mechanisms for balanced stress relief · level C

Magnesium

Enhanced muscle relaxation and sleep support

Both support relaxation and sleep through different pathways · level C

What not to take with Magnolia Bark

2 documented

Stimulants Caffeine

May oppose relaxation and calming effects

Opposing effects on nervous system arousal and stress response · mild significance

Excessive Alcohol

May enhance sedative effects

Both affect CNS and may be additive · moderate significance

Medication interactions

Discuss these with a pharmacist before combining

sedative-medications Minor

May enhance sedative effects

What to do: Monitor for increased sedation

blood-pressure-medications Minor

May affect blood pressure control

What to do: Monitor blood pressure

diabetes-medications Minor

May affect blood sugar levels

What to do: Monitor blood glucose

Available forms

bioavailability compared

Magnolia Bark Extract (Standardized 90% Honokiol/Magnolol) 65

Magnolia Bark Extract (Standardized 90% Honokiol/Magnolol): Cortisol regulation, Sleep support, Neuroprotection, Traditional use

Food sources

before you supplement

Magnolia bark (dried) Traditional herbal preparation · 60

Magnolia bark tea Moderate honokiol/magnolol extraction · 55

Standardized extracts Concentrated honokiol/magnolol (90%) · 65

Not found in common foods Specific Chinese medicinal tree bark · N/A

Too little

deficiency signs

Not applicable (herbal supplement, not essential nutrient):
General symptoms addressed by magnolia bark:
Chronic stress and elevated cortisol levels
Poor sleep quality due to stress and anxiety
Anxiety and mood imbalances
Stress-related cognitive decline
Stress-induced weight gain and metabolic issues

Too much

toxicity signs

Generally safe with some considerations:
Drowsiness and sedation with high doses
Mild blood pressure effects
Digestive upset (rare)
Good overall safety profile

Who benefits most

chronic-stress-cortisol-elevation

Natural stress relief and cortisol regulation for chronic stress management

200-800mg daily (standardized to 90% honokiol/magnolol)

sleep-quality-stress-insomnia

Sleep support and relaxation for stress-related sleep difficulties

200-400mg 30-60 minutes before bedtime

anxiety-mood-support

Natural anxiety reduction and mood support through stress relief

200-600mg daily

neuroprotection-cognitive-health

Neuroprotective support and cognitive health maintenance

200-400mg daily

weight-management-stress-eating

Stress-related weight management and cortisol-induced weight gain

200-600mg daily

Where to buy it

compare forms first

Look for Magnolia Bark at 200-800mg per serving. The form that matters here is Magnolia Bark Extract (Standardized 90% Honokiol/Magnolol).

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What else affects it

Beyond other supplements

Excessive alcohol

May enhance sedative effects

Both affect CNS and may be additive

How it works

Honokiol and magnolol modulate HPA axis reducing cortisol production and stress response
GABAergic activity enhances calming neurotransmitter function for relaxation
Modulates serotonin and dopamine systems supporting mood and anxiety regulation
Antioxidant and anti-inflammatory effects provide neuroprotection and brain health
Regulates stress-induced metabolic changes supporting healthy weight management
Supports healthy sleep architecture through stress reduction and relaxation

Key findings

what the evidence supports

Promising research on stress relief and cortisol regulation
Good traditional use evidence for sleep and anxiety support
Emerging neuroprotection and cognitive health research
Generally safe with good tolerability profile

Sources: NIH Examine.com · data reviewed 2026-08-02

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of Magnolia Bark?

Documented effects: Stress relief and cortisol regulation; Sleep quality and relaxation; Anxiety reduction and mood support; Neuroprotection and cognitive support. Reduces stress and helps regulate cortisol levels

How much Magnolia Bark should you take per day?

The common daily range is 200-800mg. By goal — stress cortisol support: 200-800mg daily; sleep support: 200-400mg before bedtime; anxiety mood support: 200-600mg daily; neuroprotection: 200-400mg daily.

When is the best time to take Magnolia Bark?

Evening with meals. First effects are typically reported within 30-60 minutes for acute calming, 2-6 weeks for stress regulation.

What are the side effects of Magnolia Bark?

At excessive doses: Generally safe with some considerations:, Drowsiness and sedation with high doses, Mild blood pressure effects, Digestive upset (rare), Good overall safety profile. Safety rating at normal doses is 7 out of 10.

What should you not take with Magnolia Bark?

Separate it from Stimulants Caffeine, Excessive Alcohol by two to four hours. May oppose relaxation and calming effects

Does Magnolia Bark interact with medications?

Documented interactions with sedative-medications, blood-pressure-medications, diabetes-medications. Discuss these with a pharmacist before combining.

How do you know if you need Magnolia Bark?

The marker is Cortisol levels, stress hormones, blood pressure if relevant, optimal range Normalized cortisol levels, reduced stress hormone markers. Common deficiency signs: Not applicable (herbal supplement, not essential nutrient):, General symptoms addressed by magnolia bark:, Chronic stress and elevated cortisol levels, Poor sleep quality due to stress and anxiety.

Taken for

28 Sleep & Stress

Melatonin · Magnesium Glycinate · Ashwagandha

27 Hormones

Melatonin · Vitamin B6 (Pyridoxine HCl) · Vitamin B6 (P5P)