# Sparteine **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/sparteine **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-28 **Evidence Score:** 4 / 10 **Category:** Compound **Also Known As:** (-)-Sparteine, L-Sparteine, Lupinidine, Pachycarpine, 17-Oxosparteine precursor, Bis-quinolizidine alkaloid, Lupinus alkaloid, Scotch broom alkaloid ## Overview Sparteine is a quinolizidine alkaloid derived from Scotch broom (Cytisus scoparius) that acts as a sodium channel blocker. Despite historical use as an antiarrhythmic agent and labor inducer, sparteine lacks clinical validation from modern randomized controlled trials. ## Health Benefits • No clinically proven health benefits - No FDA-approved uses or human RCTs identified in research • Historical antiarrhythmic use - Used as class 1a sodium channel blocker but lacks modern clinical validation • Traditional oxytocic effects - Historically used to induce labor but without RCT evidence • Potential diuretic properties - Traditional use reported but no clinical studies found • Research chemical only - Currently limited to laboratory use as chiral ligand in synthesis ## Mechanism of Action Sparteine functions as a class 1a antiarrhythmic agent by blocking voltage-gated sodium channels in cardiac tissue, specifically targeting the Nav1.5 channels. The compound also exhibits oxytocic properties by stimulating uterine smooth muscle contractions through calcium channel modulation. Additionally, sparteine demonstrates weak anticholinergic activity at nicotinic [acetylcholine](/ingredients/condition/cognitive) receptors. ## Clinical Summary No randomized controlled trials have validated sparteine's therapeutic efficacy for any medical condition. Historical case reports from the early-to-mid 20th century documented its use as an antiarrhythmic agent, but these lacked placebo controls and standardized dosing protocols. Traditional obstetric applications for labor induction were based on observational data rather than controlled clinical studies. Modern cardiology and obstetrics have replaced sparteine with safer, evidence-based alternatives due to its narrow therapeutic window and potential toxicity. ## Nutritional Profile Sparteine is a pure alkaloid compound (C15H26N2), not a food or nutritional ingredient, therefore it has no macronutrient, micronutrient, vitamin, mineral, or fiber content. Molecular weight: 234.38 g/mol. It is a bicyclic quinolizidine alkaloid (tetracyclic structure with four nitrogen-containing rings) found naturally in Scotch broom (Cytisus scoparius) at concentrations of approximately 0.3-1.5% dry weight, lupine seeds (Lupinus spp.) at 0.02-0.5% dry weight, and lesser amounts in other Fabaceae species. As a bioactive compound, its pharmacologically relevant concentration range in isolated form is typically studied at 10-100 mg doses in historical clinical contexts. Bioavailability when ingested orally is reported as moderate, with hepatic first-pass [metabolism](/ingredients/condition/weight-management) via CYP2D6 enzyme pathway being the primary metabolic route; CYP2D6 poor metabolizers show significantly elevated plasma concentrations. Sparteine sulfate (the pharmaceutical salt form) has a reported oral bioavailability of approximately 40-60%. It is lipid-soluble (logP approximately 2.6), enabling CNS penetration. No caloric value, protein, fat, or carbohydrate content is applicable. It is not classified as a nutrient by any regulatory body. ## Dosage & Preparation No clinically studied dosage ranges exist due to lack of approved human uses and absence of RCTs. Commercial sparteine is available only as research-grade pure compound (>98% purity) without therapeutic dosing guidelines. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Sparteine exhibits significant toxicity risks including cardiac arrhythmias, hypotension, and respiratory depression at therapeutic doses. The compound is contraindicated during pregnancy despite historical oxytocic use, as it may cause uterine tetany and fetal distress. Sparteine [metabolism](/ingredients/condition/weight-management) varies dramatically due to CYP2D6 genetic polymorphisms, with poor metabolizers experiencing prolonged drug effects and increased toxicity risk. Drug interactions occur with other sodium channel blockers, antiarrhythmic medications, and drugs metabolized by CYP2D6 enzymes. ## Scientific Research No human randomized controlled trials, meta-analyses, or large-scale clinical studies were identified in PubMed or other databases for therapeutic applications of sparteine. The compound is absent from the Vaughan Williams classification and has no FDA-approved clinical uses, with toxicity concerns (cardiotoxic and neurotoxic at high doses) limiting human trials. ## Historical & Cultural Context Sparteine was historically used in 19th-century European phytotherapy from scotch broom (Cytisus scoparius) as an antiarrhythmic, diuretic, and oxytocic agent. In lupin plants, it serves as a defensive alkaloid against herbivores, but no formalized traditional medicine systems (Ayurveda, TCM) specify its isolated use. ## Synergistic Combinations None recommended due to toxicity concerns and lack of therapeutic application ## Frequently Asked Questions ### What is sparteine used for medically? Sparteine has no current FDA-approved medical uses and is not recommended for therapeutic applications. Historically, it was used as an antiarrhythmic agent and labor inducer, but modern medicine has replaced it with safer, clinically validated alternatives. ### Is sparteine safe to take as a supplement? Sparteine is not safe for supplement use due to its narrow therapeutic window and significant toxicity risks including cardiac arrhythmias and respiratory depression. The compound lacks standardized dosing guidelines and quality control in supplement formulations. ### How does sparteine affect the heart? Sparteine blocks voltage-gated sodium channels (Nav1.5) in cardiac tissue, which can alter heart rhythm and electrical conduction. While this mechanism was historically exploited for antiarrhythmic purposes, it can also cause dangerous irregular heartbeats and cardiac toxicity. ### What plants contain sparteine naturally? Sparteine is primarily found in Scotch broom (Cytisus scoparius) and other leguminous plants in the Fabaceae family. The highest concentrations occur in the seeds and flowering tops, with content varying significantly based on plant maturity and growing conditions. ### Can sparteine help with labor and delivery? Sparteine should never be used for labor induction due to serious safety risks including uterine tetany, fetal distress, and maternal complications. Modern obstetrics uses FDA-approved medications like oxytocin and misoprostol that have established safety profiles and clinical validation. ### Does sparteine interact with medications that affect heart rhythm? Sparteine acts as a class Ia sodium channel blocker, which means it can potentially interact with other antiarrhythmic medications, beta-blockers, and drugs metabolized by the CYP2D6 enzyme. Concurrent use with these medications could increase the risk of cardiac side effects and should only be considered under strict medical supervision. Due to limited modern clinical data, most healthcare providers avoid recommending sparteine alongside heart medications. ### What is the evidence quality for sparteine's traditional uses? Sparteine lacks robust clinical evidence—no randomized controlled trials in humans have validated its historical uses as an oxytocic or diuretic agent. Most information about its effects comes from traditional medicine practices and animal or in vitro studies rather than rigorous human research. The absence of modern clinical trials makes it difficult to determine safe or effective dosing for any therapeutic purpose. ### Who should avoid taking sparteine supplements? Pregnant women, people with cardiac arrhythmias, those taking CYP2D6-metabolized medications, and individuals with hypertension should avoid sparteine due to its historical effects on uterine contractions and cardiac function. Elderly individuals and those with kidney or liver impairment may be at higher risk for adverse effects because of potential impacts on drug metabolism and clearance. Anyone considering sparteine should consult a healthcare provider first, as safety data in vulnerable populations is insufficient. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*