When you buy through our links, we earn a small commission — and that is what funds all the free education here. It never costs you more. Products are not intended to diagnose, treat, cure, or prevent any disease.
What it is
A proprietary evening blend of magnolia bark (standardized to honokiol), epimedium, L-theanine from green tea, plant sterols (with beta-sitosterol), and phosphatidylserine, taken with the evening meal. It is built to support the body's normal, healthy stress-response rhythm and steady cortisol handling rather than to sedate you. It contains soy.
Why the evidence supports it
Stress physiology runs through cortisol, and this blend works it from a few angles at once: phosphatidylserine and beta-sitosterol are the ingredients most studied for helping the body manage cortisol around stress and exercise, while L-theanine is the best-supported calming compound here, with human research on relaxed, focused alertness. The honest read is that it is a proprietary blend, so not every per-ingredient amount is disclosed, and the strongest single-active evidence sits with L-theanine. Taken together, that is an evidence-based way to support the nervous system's normal downshift — the Mind's Regulate function — through a stressful stretch, not a lever that lowers a lab value.
What it supports
- Supports the body's normal, healthy stress response
- Supports a calm, settled state in the evening
- Provides L-theanine, a calming amino acid found in tea
- Complements good sleep, movement, and everyday stress habits
Which function it supports
Ties to the Mind world's Regulate function — supporting the nervous system's normal downshift as the day winds down. This is stress-response support only, not a treatment for any condition.
Learn the why behind this pillarHow it relates to your cells and mind
Every product here ties back to a specific job your body does. This one touches the functions below — follow either link to see the mechanism in full, then dig into the studies.
What it is made of — and the mechanisms behind it
Each ingredient acts on several of the body's functions. Taken together, this product touches these cell and mind functions — follow any to see the mechanism in full.
The ingredients
Mechanisms drawn from our ingredient knowledge base (5 profiled ingredients). Structure and function only — not a treatment claim.
The science on the ingredients
Honokiol Targeting SIRT3: From Molecular Mechanisms to Therapeutic Opportunities.EmergingExpert review2025
Honokiol activates SIRT3, and this review examines the biological functions and signaling pathways of this activation across various disease models.
Xiang F; Zhang Z; Li Y; Xia B; Liao Y; Yang C; He Z; Lin L; Xie J — FASEB journal : official publication of the Federation of American Societies for Experimental Biology
Protocol for Studying Honokiol Regulation of Transforming Growth Factor Beta 1/Smad Signaling in Ultraviolet A-induced Skin Photoaging Models.EmergingTrial registry2026
A trial registry on Magnolia/honokiol found that HNK has the potential to be a drug for ameliorating photo-aging damage by reducing MMP expression through activation of the TGF-β1/Smad pathway, thereby inhibiting UVA-induced photo-aging in HDF cells and mouse skin.
Ma G; Liu Z; Li Y; Tao Y — Journal of visualized experiments : JoVE
Magnolia officinalis (L.) Bark Extract Counteracts Oxidative Brain Injury: A Proteomic Investigation into Neuroprotective Mechanisms.2026
In rat brain cortical slices exposed to hydrogen peroxide-induced oxidative stress, Magnolia officinalis bark extract restored tissue viability, reduced ROS and malondialdehyde levels, and reduced activation of caspase-3, -8, and -9 apoptotic pathways.
Mattioli LB; Stella R; Peggion C; Cagnin S; Pifferi A; Miraldi E; Cappellucci G; Baini G; Camarda L; Budriesi R; Frosini M — International journal of molecular sciences
Disruption of cholesterol homeostasis triggers NLRP3-cGAS-STING axis-dependent hepatic fibrosis and honokiol intervention effects.2025
In liver cell and animal models, excess cholesterol triggered NLRP3 inflammasome activation, pyroptosis, and mitochondrial ROS that drove hepatic fibrosis, while honokiol from magnolia bark showed interventional efficacy in mitigating this cholesterol-driven damage.
Wang Z; Liu J; Mou Y; Zhou X; Liao W; Li Y; Liu Y; Tang J — Phytomedicine : international journal of phytotherapy and phytopharmacology
The Cardioprotective Effect of Magnolia officinalis and Its Major Bioactive Chemical Constituents.2025
Review describes magnolol and honokiol, the main bioactive compounds in Magnolia officinalis bark, as showing cardioprotective effects in animal and cell models, though no human clinical evidence exists yet for their absorption, bioavailability, or cardiovascular benefit.
Olas B — International journal of molecular sciences
Honokiol protects against heavy-ion radiation-induced oxidative damage via the thioredoxin system.2025
Study found honokiol, a compound from magnolia bark, protects against heavy-ion radiation-induced oxidative damage by targeting the thioredoxin reductase/thioredoxin system, identifying a specific molecular mechanism behind its radioprotective activity for the first time.
Chen Y; Shen R; Zhou X; Xu D; Wu Q; Zhang J; Fang J — Free radical biology & medicine
Therapeutic potential of Da Cheng Qi Decoction and its ingredients in regulating ferroptosis via the NOX2-GPX4 signaling pathway to alleviate and predict severe acute pancreatitis.2025
In a pancreatitis mouse model, Da Cheng Qi Decoction containing honokiol and seven other compounds reduced ferroptosis in pancreatic acinar cells by modulating the NOX2-GPX4 pathway, lowering ROS and inflammatory marker levels.
Chen J; Li F; Luo WS; Zhu MF; Zhao NJ; Zhang ZH; Chen YF; Feng DX; Yang SY; Sun WJ — Cellular signalling
Magnolol targets CCND1 to suppress the proliferation of cholangiocarcinoma cells by inhibiting the Akt and STAT3 pathways.EmergingAnimal study2026
An animal study on Magnolia/honokiol found that magnolol exerted its effect on arresting the cell cycle at the G0-G1 phase through suppressing CCND1, suggesting that magnolol holds potential as a novel anti-CCA agent.
Luo W; Meng Z; Li S — Toxicology and applied pharmacology
Laccase-Catalyzed Dimerization of Honokiol and Magnolol for Multitarget Metabolic Enzyme Inhibitors.ContestedPreclinical study2026
A preclinical study on Magnolia/honokiol found that the dimers exhibited more potent inhibitory activity than honokiol and magnolol, with houpulin B showing the strongest inhibition toward all tested enzymes.
Sciacca C; Cardullo N; Pulvirenti L; Varriale S; Vitiello L; Pezzella C; Muccilli V — Chembiochem : a European journal of chemical biology
Synergistic Effects of Honokiol on Camptothecin-triggered Apoptosis of Drug-resistant Glioblastoma Cells via CDK1-mediated G2/M Arrest and Intrinsic ROS-Mitochondrion-dependent Pathway.EmergingAnimal study2026
An animal study on Magnolia/honokiol found that our previous studies showed the benefits of CPT and CPT-containing nanoparticles on suppressing GBM tumorigenesis.
Yang CP; Chen JT; Liu SH; Chen E; Chen RM — Anticancer research
The Anti-Glioblastoma Effects of Magnolol Are Mediated through Paradoxical Enhancement of Antioxidant Defenses and Induction of Apoptosis.EmergingPreclinical study2026
A preclinical study on Magnolia/honokiol found that this novel mechanism highlights its potential as a research subject of interest.
Zand M; Latifi SA; Salehi M; Karami H — Cell journal
Honokiol Ameliorates Hepatic Lipid Accumulation by Deacetylating PPARG via SIRT3.EmergingPreclinical study2026
A preclinical study on Magnolia/honokiol found that this study suggests that HKL ameliorates hepatic lipid accumulation via SIRT3-mediated deacetylation of PPARG, providing an experimental basis for considering HKL as a research subject of interest against metabolic disorders.
Yang Y; Guo S; Luo W; Liu D; Kang X — Cells
Magnolol nanoparticles combat MRSA by disrupting TCA cycle and arginine metabolism to induce oxidative stress.EmergingAnimal study2026
An animal study on Magnolia/honokiol found that in vivo studies further demonstrated superior therapeutic efficacy with improved biocompatibility.
Xu H; Hao M; He Q; Kuang H; Tie S; Guo Q; Li J; Chen L — Colloids and surfaces. B, Biointerfaces
The synergistic anti-inflammatory effect of pterostilbene and honokiol on LPS-stimulated PMA-differentiated THP-1 macrophages.EmergingPreclinical study2026
A preclinical study on Magnolia/honokiol found that these findings support their development as a multifunctional combination targeting inflammation-related skin conditions, while underscoring the need for further investigation into dermal safety, optimized dosing strategies and broader mechanistic pathways.
Zhu C; Shen C; Wang J; Yuan M; Di L; Li Q — International journal of cosmetic science
Honokiol attenuates neuroinflammation and enhances remyelination in mouse models of multiple sclerosis through PPARγ-mediated ERK/AKT signalling.EmergingPreclinical study2026
A preclinical study on Magnolia/honokiol found that honokiol improved myelin restoration and exerted potent anti-inflammatory effects by suppressing glial activation, modulating inflammatory cytokine profiles, and restoring lipid homeostasis.
Yu X; Wei L; Zheng Y; Qi X; Mu X; Wang Q; Hua Y; Chen Q; Zhang Y; Jiang H; Wang Z; Ni P — Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics
Magnolol Ameliorates Cisplatin-Induced Acute Kidney Injury with Activation of Nrf2-Associated Antioxidant Responses.EmergingAnimal study2026
An animal study on Magnolia/honokiol found that apoptotic damage was mitigated, as shown by the fewer TUNEL-positive cells and lowered expression of pro-apoptotic markers.
Gwon MG; Park MH; Leem J — Current issues in molecular biology
Honokiol protects against acute pancreatitis by activating SIRT3 to restore mitochondrial oxidative phosphorylation and alleviate hyperacetylation.EmergingAnimal study2026
An animal study on Magnolia/honokiol found that these findings suggest a previously unrecognized SIRT3-CYC1 signaling axis underlying honokiol's mitochondrial protective effects in AP.
Miao YF; Yao JQ; Peng Y; Bai D; Fan SH; Li HY; Jin W; Lu Y — Journal of integrative medicine
Magnolol mitigates polystyrene microplastic-induced oviductal toxicity in laying hens via immunomodulation and microbiota regulation.EmergingAnimal study2026
An animal study on Magnolia/honokiol found that dietary MAG mitigates PS-induced oviductal damage through immunomodulation and microbiota regulation, ultimately improving reproductive performance in laying hens.
Lv Y; Huang W; Ge C; Wu L; Hu Z; Zhan S; Shen X; Yu D; Liu B — Poultry science
Effect of honokiol on abemaciclib metabolism both in vitro and in vivo.EmergingAnimal study2026
An animal study on Magnolia/honokiol found that honokiol and abemaciclib show significant DDIs in vitro and in vivo and more attention is required when administered synchronously.
Yang T; Song W; Lu Z; Zhou G; Wang Z; Zhou Q; Geng P; Al Mamun A; Wang S; Shi Y — The Journal of pharmacy and pharmacology
Preparation and Hypoglycemic Effect of Magnolia Officinalis Polysaccharide Oral Liquid.EmergingAnimal study2025
An animal study on Magnolia/honokiol found that the Magnolia officinalis polysaccharide oral liquid demonstrated potential antidiabetic effects by promoting glucose utilization in peripheral tissues, increasing fasting insulin levels, and enhancing antioxidant capacity alongside HK and PK activities.
Liu J; Liu W; Zhang Y; Tian Q; Xia M; Zhao Q; Zhang D; He J; Wang D; Zhu X; Liu X; Jiang N — Plant foods for human nutrition (Dordrecht, Netherlands)
Conjugation with the XJB peptide enhanced neuroprotective effect of honokiol via SIRT3 modulation.EmergingAnimal study2025
An animal study on Magnolia/honokiol found that the neuroprotective mechanism may involve the activation of cellular autophagy-related pathways, promotion of SIRT3 pathway activation, and up-regulation of mitochondrial fusion-associated protein Mfn-1 expression under damaged conditions.
Liu G; Zhang T; Qian S; Zhang X; Lou H; Fan P — European journal of medicinal chemistry
A Versatile Natural Neolignan as a Potential Pesticide Resource: Synthesis and Insecticidal Evaluation of Honokiol Derivatives Featuring a Bis(benzoxazole) Scaffold.EmergingCell-culture study2026
A cell-culture study on Magnolia/honokiol found that negligible cytotoxicity (IC50 > 100 μM) against the human keratinocyte cell line (HaCaT) suggests a favorable safety profile for mammalian exposure.
Yang C; Duan JQ; Fu H; Wang F; Zhang XY; Liu Y; Guo YQ; Zhi XY — Journal of agricultural and food chemistry
Icariin Against Neurodegeneration: A Focus in Cell Death Pathways.EmergingExpert review2026
An expert review on Epimedium/icariin found that in recent years, the flavonoid icariin has emerged as a promising candidate, showing significant potential to intercept these specific cell death mechanisms.
Rodrigues-Soares V; da Cruz HR; Dos Santos GF; Restier JG; Castilho P; Dos Santos NGF; Avgerino Dos Santos E; Souza Monteiro de Araújo D; Calaza KDC; Brito R — International journal of molecular sciences
Icariin and related metabolites in fibrosis management: pharmacological properties and molecular mechanism.EmergingExpert review2025
Icariin metabolites exert antifibrotic effects through anti-inflammatory and antioxidant activity, mitochondrial function modulation, and regulation of apoptosis and autophagy.
Zhao J; Zhang W — Frontiers in pharmacology
Balanced by design — we show supporting and contradicting findings. Search all studies
No product works in isolation
Every cell function above — Sense, Exchange, Transform, Build, Maintain, Adapt — needs the same broad base of optimal micronutrient levels running underneath it, all the time. Cortitrol is not a stand-alone fix; it is one piece that plugs into that larger system. The foundation comes first, and this supports it.
Stacks well with
Pick your goal — here is what Cortitrol pairs with for each. Nothing works in isolation; these share the same systems.
For Mood & Hormones
For Brain & Sleep
For Gut Health
Ready-made stacks it is part of
Foundational, or targeted?
Not everything in the shop is meant to be taken forever. Some products here are foundational — a daily nutrient base built for long-term, ongoing use. Others are targeted -- shorter-term support for a specific season, not a lifelong habit. If you are not sure which one this is, that is a fair question to ask us before you buy.
Learn more, on your terms
Do not take our word for it — go read. Each topic below opens a pre-loaded search so you can explore the nutrient, the mechanism, or the device for yourself.
Search the full studies libraryHow to use it
Take two capsules with the evening meal. The label allows an optional additional capsule with breakfast for some people. Follow the current bottle.
Where to get it
Ready when you are. This link takes you to the official, verified source for this product.
Get CortitrolThe studies
See the research behind the science we point to.
Explore studiesThe blog
Plain-language reads on how it all fits together.
Read the blogOptimal nutrients are the definition of longevity
Long-term cell function depends on having what it needs, at the level it needs it, for as long as it needs it. That is the whole thesis behind everything we point you to here.
When you buy through our links, we earn a small commission — and that is what funds all the free education here. It never costs you more. Products are not intended to diagnose, treat, cure, or prevent any disease.
Cortitrol is a modest evening blend of magnolia bark, L-theanine, plant sterols, and phosphatidylserine, taken with the evening meal. It is designed to support the body's normal, healthy stress-response rhythm rather than to sedate you. It suits people looking for gentle support through a stressful stretch.
Common questions
What does Cortitrol support?+
It supports the body's normal, healthy stress response and a calm, settled state in the evening, provides L-theanine (a calming amino acid found in tea), and complements good sleep, movement, and everyday stress habits.
How do I take it?+
Take two capsules with the evening meal. The label allows an optional additional capsule with breakfast for some people. Follow the current bottle.
What makes it different?+
It is a proprietary blend, so the framing stays modest on purpose. The strongest single active is L-theanine, which has calming research behind it, so it is gentle stress-response support rather than anything that lowers a lab number.