Hermetica Superfood Encyclopedia
The Short Answer
Calceolarioside is a phenolic glycoside compound found in plants such as Calceolaria and Plantago species, composed of a phenylethanoid backbone linked to sugar moieties. It exerts its primary effects through free radical scavenging, inhibition of oxidative stress pathways, and potential interference with parasitic cell survival mechanisms.
CategoryNamed Bioactive Compounds
GroupCompound
Evidence LevelModerate
Primary Keywordcalceolarioside benefits
Synergy Pairings3
Calceolarioside — botanical close-up
Health Benefits
Origin & History
Natural habitat
Calceolarioside refers to phenylethanoid glycosides, primarily Calceolarioside A and B, naturally occurring in plants such as Fraxinus insularis, Plantago depressa, and night jasmine (Nyctanthes arbor-tristis). These hydroxycinnamic acid derivatives are extracted through bioactivity-guided fractionation of methanolic or polar leaf extracts.
“No historical or traditional medicinal uses are documented in the available sources. Current research focuses solely on modern phytochemical isolation without ethnobotanical context.”Traditional Medicine
Scientific Research
No human clinical trials, RCTs, or meta-analyses have been conducted on calceolarioside. Research is limited to preclinical studies including a mouse study on visceral leishmaniasis (Planta Medica, 2008) and rabbit platelet aggregation studies (Planta Medica, 1993), though specific PMIDs were not provided in the available sources.
Preparation & Dosage
Traditional preparation
No clinically studied dosages in humans are available. Preclinical studies used isolated compounds without specified standardization ranges for extracts or powders. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
Calceolarioside is a phenylpropanoid glycoside (phenylethanoid glycoside) compound, not a whole food ingredient, and therefore does not possess a conventional macronutrient or micronutrient profile. It has no meaningful protein, fat, carbohydrate, fiber, vitamin, or mineral content in the nutritional sense. As a pure bioactive compound, its profile is defined entirely by its chemical structure and bioactive properties: it is a glycosylated phenolic ester consisting of a caffeic acid moiety linked to a sugar backbone (typically glucose or rhamnose) and a hydroxytyrosol-related aglycone unit. Molecular weight is approximately 476–624 Da depending on the specific glycoside variant (A, B, or E forms). The compound contributes to the total polyphenol content of source plants such as species in the Calceolaria, Buddleja, and Olea genera. Its antioxidant capacity is documented at IC50 = 4.15 μM against hydroxyl radicals in vitro, indicating high molar potency relative to common antioxidants. Bioavailability is a significant constraint: as a glycoside, intestinal absorption requires hydrolysis by gut microbiota or brush-border enzymes to release the aglycone; first-pass metabolism and molecular size (~500+ Da) are expected to limit systemic bioavailability, though no specific human pharmacokinetic data (Cmax, Tmax, oral bioavailability %) are currently published. Source plant concentrations are typically in the range of 0.01–0.5% dry weight in relevant plant tissues, but no standardized dietary intake or supplemental dosage has been established.
How It Works
Mechanism of Action
Calceolarioside scavenges reactive oxygen species by donating hydrogen atoms from its catechol hydroxyl groups, demonstrated by an IC50 of 4.15 μM against hydroxyl radicals in vitro. It may protect cardiomyocytes by attenuating adriamycin-induced mitochondrial membrane disruption and reducing lipid peroxidation, likely through inhibition of NADPH oxidase and suppression of NF-κB-mediated apoptotic signaling. Against Leishmania donovani, it may interfere with the parasite's redox homeostasis, targeting trypanothione reductase, a thiol-metabolism enzyme absent in mammals.
Clinical Evidence
Research on calceolarioside remains at the preclinical stage, with no published human clinical trials to date. In vitro studies have demonstrated hydroxyl radical scavenging activity with an IC50 of 4.15 μM, placing it among moderately potent natural antioxidants in cell-free assay systems. Cardioprotective effects against adriamycin-induced toxicity have been observed in isolated cell models, and antileishmanial activity has been noted in parasite culture studies, though neither finding has been validated in animal models with sufficient rigor or in human subjects. The current evidence base is insufficient to establish efficacious doses, bioavailability, or clinical relevance in any therapeutic context.
Safety & Interactions
No human safety data, clinical adverse event profiles, or tolerability studies exist for isolated calceolarioside supplementation. Because phenolic glycosides can inhibit cytochrome P450 enzymes such as CYP3A4 and CYP2C9, theoretical interactions with anticoagulants, immunosuppressants, and chemotherapeutic drugs like doxorubicin cannot be excluded. Pregnant and breastfeeding individuals should avoid calceolarioside supplements entirely due to a complete absence of reproductive safety data. Individuals with known hypersensitivity to phenylethanoid glycosides or related Plantaginaceae-family plant compounds should exercise caution.
Synergy Stack
Hermetica Formulation Heuristic
Also Known As
Calceolarioside ACalceolarioside BPhenylethanoid glycosides from CalceolariaHydroxycinnamic acid derivativesPhenolic glycosides from Fraxinus insularisNight jasmine glycosidesPlantago depressa phenolic compounds
Frequently Asked Questions
What is calceolarioside and what plants does it come from?
Calceolarioside is a phenylethanoid glycoside, a class of phenolic compounds in which a hydroxytyrosol or caffeic acid-derived unit is esterified to a sugar backbone. It has been isolated from plants including Calceolaria species, Plantago major, and certain members of the Orobanchaceae family. It is not currently available as a standardized standalone dietary supplement.
What is the antioxidant strength of calceolarioside compared to other compounds?
In vitro testing has measured calceolarioside's hydroxyl radical scavenging activity at an IC50 of 4.15 μM, which is a moderately potent result in cell-free radical scavenging assays. For comparison, well-characterized antioxidants like resveratrol and quercetin typically show IC50 values in the low-micromolar range under similar conditions. However, in vitro antioxidant assays do not reliably predict in vivo efficacy due to absorption, metabolism, and bioavailability variables.
Can calceolarioside protect the heart from chemotherapy damage?
Preliminary in vitro evidence suggests calceolarioside may reduce adriamycin (doxorubicin)-induced cytotoxicity in cardiac cell models, likely by mitigating oxidative stress and mitochondrial membrane damage caused by the anthracycline drug. These findings come exclusively from cell culture experiments and have not been replicated in animal models or human studies. It would be premature and potentially dangerous to use calceolarioside as a cardioprotective adjunct to chemotherapy without clinical evidence.
Does calceolarioside have antiparasitic effects against leishmaniasis?
In vitro studies indicate calceolarioside exhibits activity against Leishmania donovani, the protozoan parasite responsible for visceral leishmaniasis, potentially by disrupting the parasite's trypanothione-based antioxidant defense system. This mechanism is considered a validated drug target because trypanothione reductase is absent in human cells, suggesting selectivity. However, no in vivo pharmacokinetic or efficacy data in animal or human models has been published, so clinical application remains speculative.
What is the recommended dosage of calceolarioside?
There is currently no established or scientifically validated dosage for calceolarioside in humans, as no clinical trials or formal dose-finding studies have been conducted. All bioactive effects have been observed in isolated cell systems using concentrations that may not be achievable in human plasma through oral supplementation. Until pharmacokinetic studies establish absorption rates and safe dose ranges, no dosage recommendation can be responsibly made.
Does calceolarioside have any known drug interactions with anticoagulants or antiplatelet medications?
Calceolarioside may modulate platelet aggregation based on preliminary research, which theoretically could interact with anticoagulants or antiplatelet drugs like warfarin or aspirin. However, no clinical drug interaction studies have been conducted in humans, so the actual risk remains unknown. Anyone taking blood-thinning medications should consult a healthcare provider before using calceolarioside supplements.
Is calceolarioside safe to use during pregnancy or while breastfeeding?
There is no safety data available for calceolarioside use during pregnancy or lactation, as no human studies have been conducted in these populations. Given the lack of evidence, pregnant and breastfeeding women should avoid calceolarioside supplements until safety can be established. Consultation with a healthcare provider is essential before considering use.
How strong is the current scientific evidence supporting calceolarioside's health benefits?
The evidence for calceolarioside remains preliminary, consisting primarily of in vitro studies and one animal (mouse) study for leishmaniasis; no human clinical trials have been published. While the antioxidant properties and potential cardioprotective effects are promising, these findings cannot yet be reliably translated to human supplementation. More rigorous clinical research is needed before calceolarioside can be recommended as an evidence-based supplement.
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