Scoparone

Scoparone (6,7-dimethoxycoumarin) is a naturally occurring coumarin compound found in herbs such as Artemisia capillaris and citrus peels. It exerts hepatoprotective and anti-inflammatory effects primarily by modulating NF-κB signaling and suppressing pro-inflammatory cytokine production.

Origin & History

Scoparone is a naturally occurring coumarin compound isolated from Artemisia capillaris (capillary wormwood), a plant in the Compositae family traditionally used in oriental medicine. The compound is extracted from the shoot of this herb and belongs to the benzopyrone class of organic compounds known for diverse pharmacological properties.

Historical & Cultural Context

Scoparone is derived from Artemisia capillaris, which has been used in Traditional Chinese Medicine for treating hepatitis and biliary tract infections. The herb represents a component of traditional oriental medicine formulas, though specific historical duration and detailed traditional applications beyond hepatic conditions are not documented in available research.

Health Benefits

• May protect liver health by improving hepatic steatosis, inflammation, and fibrosis in animal models of non-alcoholic steatohepatitis (PMID: 31421545) - preliminary evidence only
• Demonstrates anti-inflammatory effects by reducing IL-8 and MCP-1 production in human monocyte cell cultures at 5-100 μM concentrations (PMID: 16376386) - in vitro evidence only
• Shows potential cardiovascular benefits by inhibiting aortic aneurysm formation in mice through smooth muscle cell regulation (PMID: 40490231) - animal evidence only
• May support cognitive function with procognitive effects observed in Swiss mice at 2.5-25 mg/kg doses (PMID: 35039558) - preliminary animal evidence
• Reduces oxidative stress by suppressing lipopolysaccharide-induced superoxide formation in endothelial cells (PMID: 12928592) - in vitro evidence only

How It Works

Scoparone inhibits NF-κB activation, thereby reducing downstream transcription of pro-inflammatory mediators including IL-8 and MCP-1 in monocytes. It also activates AMP-activated protein kinase (AMPK) and suppresses SREBP-1c-mediated lipogenesis, which may explain its ability to reduce hepatic fat accumulation and fibrosis in animal models. Additionally, scoparone has demonstrated inhibition of platelet aggregation via cyclic AMP-phosphodiesterase inhibition, contributing to its vasodilatory properties.

Scientific Research

Current evidence for scoparone consists entirely of preclinical studies in animal models and cell cultures, with no human clinical trials identified. Key studies include a 2019 mouse model showing hepatoprotective effects (PMID: 31421545), a 2022 neuropsychopharmacological profiling in mice (PMID: 35039558), and in vitro studies demonstrating anti-inflammatory effects in human cell lines (PMIDs: 16376386, 12928592).

Clinical Summary

The majority of evidence for scoparone comes from in vitro cell culture studies and rodent models of non-alcoholic steatohepatitis (NASH), where it reduced hepatic steatosis, inflammation, and fibrosis markers (PMID: 31421545). Anti-inflammatory effects, including reduction of IL-8 and MCP-1 production, have been demonstrated in human monocyte cultures at concentrations of 5–100 µM, though these concentrations have not been confirmed as achievable in human plasma. No controlled clinical trials in humans have been published to date, meaning all conclusions about efficacy in people remain preliminary. The overall evidence base is weak by clinical standards, and extrapolation from animal and cell studies should be made cautiously.

Nutritional Profile

Scoparone (6,7-dimethoxycoumarin) is a pure bioactive compound, not a whole food ingredient, and therefore contains no macronutrients (protein: 0g, carbohydrates: 0g, fat: 0g), dietary fiber, vitamins, or minerals in any meaningful nutritional sense. Molecular weight: 206.19 g/mol. Molecular formula: C11H10O4. It is a dimethoxylated coumarin derivative belonging to the benzopyrone class of polyphenolic compounds. Naturally occurring in several plant sources including Artemisia capillaris (yan chen), citrus peel (particularly in the flavedo of oranges and lemons at concentrations ranging approximately 0.1–2.5 mg/g dry weight depending on cultivar and ripeness), and Scoparia dulcis. As an isolated compound, bioavailability studies in rodent models suggest moderate oral absorption with hepatic first-pass metabolism; it undergoes O-demethylation to yield esculetin and related metabolites. Effective in vitro concentrations reported in cell culture studies range from 5–100 μM. Lipophilicity (estimated LogP ~1.6) suggests moderate membrane permeability. No established dietary reference intake, recommended daily allowance, or tolerable upper intake level exists for scoparone as a standalone compound. Trace quantities are consumed incidentally through citrus-containing foods and herbal teas derived from Artemisia species.

Preparation & Dosage

Preclinical dosing: 2.5-25 mg/kg in animal studies (intraperitoneal); 5-100 μM in cell culture studies. No standardized human dosages have been established due to lack of clinical trials. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Milk thistle, N-acetylcysteine, Alpha-lipoic acid, Curcumin, Artichoke extract

Safety & Interactions

No formal human safety trials for isolated scoparone have been conducted, so a well-characterized side effect profile does not yet exist. Because scoparone inhibits cytochrome P450 enzymes, including CYP1A2 and CYP2C9, in vitro, it may theoretically alter the metabolism of drugs such as warfarin, caffeine, or NSAIDs, though clinical significance is unconfirmed. Its antiplatelet and vasodilatory properties suggest potential additive effects with anticoagulant or antihypertensive medications, warranting caution. Use during pregnancy or lactation is not recommended due to the complete absence of safety data in these populations.