Oroxylum.
Oroxylum bark carries the same flavone family as Chinese skullcap, baicalein and chrysin among them, studied for calm and for a healthy inflammatory response.
- Category
- Herb
What Oroxylum is, and what it does.
- Does it work
- Suits people who already work with the skullcap flavones and want them from a different tree. With 863 records at Europe PMC, most of it is laboratory and animal work.
- How much to take
- No daily amount is on record for oroxylum bark. Start with what the extract itself states, and take it with a meal containing fat, since these flavones dissolve poorly.
- Time to feel it
- Nobody has measured a human time course. Animal work on the calming side reads within hours of a dose, which does not transfer straight across to a person.
- The first dose
- Day one is usually uneventful. Some people notice a mild settling in the evening, and loose bark powder is bitter enough to be noticeable on its own.
- With regular use
- Weeks of daily use have not been tracked in people, so there is no measured picture yet of what a longer course does.
- How well tolerated
- Human tolerance data is thin because the literature is mostly preclinical. Check with a clinician first, particularly if you already take anything sedating.
- How it feels
- Described as a quiet, low-key calm rather than anything heavy. Chrysin clears fast through gut wall conjugation, so whatever shows up is short lived.
- The overlooked benefit
- The young pods are an everyday vegetable across Southeast Asia. That is a different material from the bark extract and does not carry the same flavone load.
The proof, claim by claim.
These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.
- binding at the benzodiazepine site of the GABA-A receptorIn vitro study
- calming behaviour in animal modelsAnimal study
- lipoxygenase inhibition by baicaleinIn vitro study
- poor oral bioavailability of chrysinNarrative review
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
Baicalein, chrysin and oroxylin A are lipophilic flavones with low aqueous solubility, which is a major limit on how much gets absorbed from a dry powder. Taking them with a fat containing meal or a lipid vehicle raises the dissolved fraction available for uptake. This is standard solubility chemistry rather than a special property of this plant. The size of the gain depends on the formulation.
Phospholipid complexes and liposomal carriers are widely used to raise the bioavailability of lipophilic flavonoids, and the same chemistry applies to the Oroxylum flavones. Lecithin in a formulation acts as an emulsifier that keeps the flavone dispersed rather than settling out. This is a delivery mechanism, not an added activity. The pairing is formulation practice.
Baicalein and chrysin are subject to extensive intestinal glucuronidation, which is the main reason oral chrysin shows such poor systemic exposure. Piperine inhibits UDP glucuronosyltransferases and has raised flavonoid exposure in animal work. Direct human data with Oroxylum is absent. Piperine also raises exposure to co administered medicines, which is a caution rather than a bonus.
Quercetin and the Oroxylum flavones are both substrates for UGT enzymes and for efflux transporters in the gut wall. Taken together in quantity they compete, which can raise exposure to one or both in a way that is hard to predict. Whether that is useful or a problem depends on what else is in the regimen. The direction is a real pharmacokinetic effect and the magnitude is unmeasured for this pair.
Both chrysin and baicalein show affinity for the benzodiazepine binding site on GABA-A receptors in vitro, which is the mechanistic root of the calming reputation of this flavone family. Stacking with other agents aimed at GABAergic signalling can add on the drowsiness side. Oral GABA itself has poor central penetration, so the practical additive effect may be small. The receptor binding is laboratory work, not a demonstrated human sedative effect.
Both are used in evening formulations and both are proposed to act somewhere around GABAergic signalling. Two sedating botanicals together mean more next morning heaviness for some people. No controlled work has tested this pair. Start with one before adding the other.
Curcumin and the Oroxylum flavones are both cleared largely by glucuronidation in the gut wall and liver. Taken in quantity at the same time they draw on the same finite conjugating capacity, which can raise circulating levels of either. Both are also often sold with piperine, which compounds the effect. This is a pharmacokinetic caution rather than a synergy to seek out.
Nothing specific on file for Oroxylum. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.What Oroxylum actually does.
Its active compounds are a family of flavones, the same group found in Chinese skullcap.
Chrysin looks impressive in a test tube and mostly gets destroyed before it reaches your bloodstream.
The young pods are food. The bark is the supplement material. They are not the same thing.
These flavones latch onto the same receptor site that calming medicines use, at least in the lab.
Where Oroxylum comes from.
A Southeast Asian tree whose bark carries the same flavone family as Chinese skullcap. Getting those compounds into your bloodstream is the hard part, because they dissolve poorly and get cleared fast.
Made from a plant. What ends up in the capsule tracks the harvest, so batch testing and a stated marker matter more here than with a made molecule.
A tall tree of South and Southeast Asia with distinctive long sword shaped pods, known regionally as midnight horror or broken bones tree. Bark, seed and young pods are all harvested but for different purposes.
Dried and milled bark or seed is extracted with aqueous ethanol, which pulls both the glycoside baicalin and the lipophilic aglycones.
The extract is concentrated under vacuum, sometimes with adsorbent resin treatment to raise the flavone fraction relative to sugars and tannins.
Baicalein, baicalin or total flavones are quantified by HPLC and the extract is adjusted with a carrier to a stated percentage.
Finished as a dry extract powder for encapsulation, or complexed with phospholipid where solubility is the limiting factor.
The forms it comes in.
The essence, in one line each.
- Oroxylum indicum extract reduced memory deficits and increased hippocampal neurogenesis markers in a rat aging model induced by D-galactose.Animal study. Tanrangka et al., 2025 (Scientific Reports). PMID 41330961 ↗
- Oroxylum indicum extract protected cultured neuronal cells against a stress challenge, with the authors attributing the effect to upregulation of protective signalling pathways.In vitro study. Sreedharan et al., 2024 (Nutrients). PMID 38931243 ↗
These are the studies our verdict leans on, chosen from the 2 we read for Oroxylum. The full linked list is below.
The studies, linked.
2 sources behind our Oroxylum verdict: peer-reviewed studies and registered clinical trials. Every one links straight to PubMed, the journal, or ClinicalTrials.gov. Read them yourself.
- Clinical trialA Randomized, Double-Blind Placebo Controlled Study to Assess the Effects of an Oroxylum Indicum Extract (Sabroxy™) on Cognitive Function in Adults With Self-reported, Mild Cognitive ImpairmentxClinicalTrials.gov ↗70 participants, Completed
- Clinical trialAn 8-week Study Evaluating the Effects of a Dietary Supplement (Sabroxy®) on Insulin Resistance and Cognitive Function in Subjects With Mild Cognitive Impairment and Insulin ResistanceClinicalTrials.gov ↗140 participants, Recruiting
Evidence surfaced via Semantic Scholar (Allen Institute for AI) and ClinicalTrials.gov. Ranked by study type and citation weight, not cherry-picked.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.
