Hermetica Superfood Encyclopedia
The Short Answer
Cinchonine is a naturally occurring cinchona alkaloid derived from the bark of Cinchona trees, structurally related to quinine but lacking its methoxy group. It inhibits heme polymerization in Plasmodium parasites and modulates P-glycoprotein activity, making it a subject of pharmacological rather than dietary supplement research.
CategoryNamed Bioactive Compounds
GroupCompound
Evidence LevelModerate
Primary Keywordwhat is cinchonine
Synergy Pairings3
Cinchonine — botanical close-up
Health Benefits
Origin & History
Natural habitat
Cinchonine is a naturally occurring alkaloid found in the bark of Cinchona species, particularly Cinchona micrantha, native to South America. It is extracted through isolation processes from cinchona bark and appears as white or faintly yellow crystalline powder with the molecular formula C₁₉H₂₂N₂O.
“Cinchonine occurs in cinchona bark, historically used in traditional Andean and later European medicine for malaria treatment due to related alkaloids like quinine. Its isolation and structure were elucidated by Rabe in the early 20th century, building on cinchona's importation by Jesuits from the 1600s.”Traditional Medicine
Scientific Research
No key human clinical trials, RCTs, or meta-analyses were identified for cinchonine as a primary therapeutic agent. The available sources note its occurrence in cinchona bark alongside quinine but do not reference specific clinical studies or PubMed PMIDs for cinchonine itself.
Preparation & Dosage
Traditional preparation
No clinically studied dosage ranges or standardization details are available, as no human clinical data has been reported. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
Cinchonine (C19H22N2O, molecular weight 294.39 g/mol) is a pure alkaloid compound and not a nutritional substance. It contains no macronutrients (zero protein, fat, or carbohydrates in functional dietary sense), no dietary fiber, no vitamins, and no essential minerals. As a stereoisomeric cinchona alkaloid, its bioactive components are confined to a quinoline ring system and a quinuclidine ring with a vinyl group and a secondary alcohol (hydroxyl group at C-9 position). It is structurally similar to quinine but lacks the methoxy group at C-6'. Naturally occurring in cinchona bark (Cinchona officinalis) at concentrations typically ranging from 0.2–0.5% of dry bark weight, alongside quinine, quinidine, and cinchonidine. As an isolated compound used in chemical synthesis and as a chiral catalyst, it has no caloric value or nutritional contribution. Its bioavailability as a pharmaceutical-relevant compound is characterized by oral absorption, though human pharmacokinetic data for isolated cinchonine is extremely limited compared to quinine. The compound is light-sensitive and degrades upon UV exposure, which would further reduce any theoretical bioactive fraction. No dietary reference values, recommended intakes, or nutritional benchmarks exist for this compound.
How It Works
Mechanism of Action
Cinchonine inhibits the formation of hemozoin (malaria pigment) by interfering with heme polymerization in Plasmodium falciparum, preventing the parasite from detoxifying toxic free heme. It also acts as a potent inhibitor of P-glycoprotein (P-gp, ABCB1), a membrane efflux transporter, which has raised interest in reversing multidrug resistance in cancer cells. Additionally, cinchonine has demonstrated inhibition of cytochrome P450 enzymes, particularly CYP2D6 and CYP3A4, affecting metabolism of multiple co-administered drugs.
Clinical Evidence
No human clinical trials have specifically evaluated isolated cinchonine as a therapeutic agent or dietary supplement, leaving its clinical evidence base essentially nonexistent. Historical use of cinchona bark preparations — which contain cinchonine alongside quinine, quinidine, and cinchonidine — provided empirical support for antimalarial activity, but attributing outcomes to cinchonine alone is not possible from this data. In vitro studies demonstrate measurable P-glycoprotein inhibition and antiparasitic activity at micromolar concentrations, but these findings have not been translated into controlled human trials. The overall evidence strength is preclinical only, and cinchonine cannot be recommended for any therapeutic indication based on current research.
Safety & Interactions
Cinchonine shares structural and pharmacological similarities with quinine and quinidine, raising concern for cinchonism — a syndrome involving tinnitus, headache, nausea, and visual disturbances at elevated doses. Its inhibition of CYP2D6 and CYP3A4 creates significant potential for drug-drug interactions, particularly with anticoagulants, antiarrhythmics, and drugs with narrow therapeutic windows. Cinchona alkaloids as a class are contraindicated in pregnancy due to documented uterine stimulant effects and potential teratogenicity observed in animal models. Individuals with glucose-6-phosphate dehydrogenase (G6PD) deficiency face heightened risk of hemolytic anemia from cinchona-derived alkaloids.
Synergy Stack
Hermetica Formulation Heuristic
Also Known As
Cinchonine alkaloidC19H22N2OCinchona alkaloidQuinidine isomerLaevorotatory cinchonidineCinchona bark alkaloidα-Cinchonine
Frequently Asked Questions
Is cinchonine the same as quinine?
Cinchonine and quinine are both cinchona alkaloids but are distinct compounds. Quinine contains a methoxy group (-OCH3) on its quinoline ring that cinchonine lacks, making cinchonine its desmethoxy analog. This structural difference results in somewhat different pharmacological potency and metabolic profiles, though both inhibit heme polymerization in malaria parasites.
Can cinchonine reverse drug resistance in cancer?
In vitro studies have shown cinchonine inhibits P-glycoprotein (P-gp/ABCB1), an efflux pump responsible for multidrug resistance in cancer cells, at concentrations in the low micromolar range. Laboratory experiments demonstrated enhanced intracellular accumulation of chemotherapy agents like doxorubicin in resistant cell lines when cinchonine was co-applied. However, no human clinical trials have evaluated this effect, so no conclusions about cancer treatment efficacy can be drawn.
What foods or plants naturally contain cinchonine?
Cinchonine is found naturally in the bark of Cinchona tree species, particularly Cinchona officinalis and Cinchona pubescens, native to South America. The bark typically contains a mixture of alkaloids including quinine, quinidine, cinchonidine, and cinchonine, with concentrations varying by species and growing conditions. Cinchonine is not meaningfully present in common dietary foods.
Is cinchonine safe to take as a supplement?
Cinchonine is not established as a safe or approved dietary supplement, and no standardized dosing guidelines exist for human use. Its structural similarity to quinine means it carries risk of cinchonism symptoms — including tinnitus, nausea, and cardiac arrhythmias at high doses — and it inhibits CYP2D6 and CYP3A4 enzymes, creating drug interaction potential. Anyone considering cinchona alkaloid products should consult a physician, particularly those on medications with narrow therapeutic windows.
How does cinchonine differ from cinchonidine?
Cinchonine and cinchonidine are stereoisomers — they share the same molecular formula (C19H22N2O) and connectivity but differ in the spatial configuration at their chiral centers (C8 and C9). Cinchonidine is the 8S,9R enantiomeric pair corresponding to cinchonine's 8R,9S configuration. These stereochemical differences produce distinct interactions with biological targets, and cinchonidine is generally considered to have greater antimalarial potency than cinchonine in comparative in vitro studies.
What is the current research status on cinchonine's therapeutic potential?
Cinchonine has not undergone human clinical trials and lacks clinically proven health benefits in evidence-based medicine. While historically associated with cinchona bark's antimalarial properties, the specific therapeutic effects of isolated cinchonine have not been established through rigorous research. Most scientific interest in cinchonine focuses on its use as a chemical reagent in synthesis rather than as a therapeutic agent.
Why does cinchonine require special storage conditions?
Cinchonine is a light-sensitive compound that degrades when exposed to light, requiring protective storage conditions to maintain its chemical stability. Proper storage typically involves keeping the substance in amber or opaque containers away from direct sunlight and UV exposure. Improper storage can compromise the compound's integrity, which is especially important if considering it for any application where purity matters.
Is cinchonine used in supplement formulations or only in industrial applications?
Cinchonine is primarily used in chemical synthesis and industrial applications rather than as an ingredient in consumer supplements. Due to the lack of established clinical benefits and limited safety data from human studies, it is not commonly found in supplement formulations sold for health purposes. Any cinchonine sourced through supplement channels should be approached with caution given the absence of regulatory guidance and clinical evidence for supplemental use.
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