Datura (Datura metel)

Datura metel is a toxic plant containing tropane alkaloids like scopolamine and atropine that act as potent anticholinergic agents. Despite traditional use in Ayurveda, this plant poses serious safety risks and lacks adequate human clinical evidence for therapeutic applications.

Origin & History

Datura metel is an annual herb in the Solanaceae family, commonly known as thorn's apple or devil's trumpet, native to temperate zones and distributed worldwide. The bioactive compounds are primarily extracted via acidic methanol extraction from the whole plant, yielding tropane alkaloids including atropine, scopolamine, and hyoscyamine, alongside flavonoids, tannins, and withanolides.

Historical & Cultural Context

Datura metel has been used in traditional medicine since approximately 37 A.D. across global systems, particularly in Ayurveda and other herbal traditions. Historical applications leveraged its pharmacological profile, though specific traditional protocols are not detailed in the available research.

Health Benefits

• Potential hepatoprotective effects (preclinical evidence only)
• Possible anti-asthmatic properties (based on in vitro/animal studies)
• Antimicrobial activity against certain pathogens (laboratory studies)
• Potential analgesic and antipyretic effects (no human clinical data)
• Possible anticancer properties from withanolides like Baimantuoluoline D (LC50 46.1636 µg/ml in cytotoxicity assays)

How It Works

Datura metel's primary bioactive compounds are tropane alkaloids including scopolamine, atropine, and hyoscyamine, which competitively antagonize muscarinic acetylcholine receptors. These anticholinergic effects block parasympathetic nervous system activity, affecting cardiovascular, respiratory, and central nervous systems. The plant's antimicrobial activity may involve disruption of bacterial cell membrane integrity through alkaloid interactions.

Scientific Research

No human clinical trials, randomized controlled trials, or meta-analyses for Datura metel were found in the research. All reported pharmacological activities including hepatoprotective, antiviral, antibacterial, and anticancer effects derive exclusively from preclinical (in vitro/in vivo) data, not human trials.

Clinical Summary

Current evidence for Datura metel consists entirely of preclinical studies with no human clinical trials available. In vitro studies have demonstrated antimicrobial activity against select bacterial and fungal pathogens. Animal studies suggest potential hepatoprotective effects and anti-asthmatic properties, but these findings cannot be extrapolated to human use. The lack of human safety and efficacy data, combined with the plant's high toxicity profile, makes clinical application inadvisable.

Nutritional Profile

Datura metel is not consumed as a food source and thus lacks conventional macronutrient or micronutrient nutritional value in the dietary sense. Its profile is dominated by bioactive alkaloids and secondary metabolites rather than traditional nutrients. Key bioactive compounds include: (1) Tropane alkaloids — total alkaloid content ranges from 0.2% to 0.45% dry weight in leaves and seeds; scopolamine (hyoscine) at approximately 0.06–0.3% dry weight, atropine (dl-hyoscyamine) at 0.02–0.2% dry weight, and hyoscyamine as the primary enantiomeric constituent. Seed alkaloid concentration tends to be highest among plant parts. (2) Withanolides — steroidal lactones including Daturametelin B, Daturametelin C, and Baimantuoluoline D (the latter demonstrating LC50 of 46.1636 µg/ml in cytotoxicity assays); total withanolide content estimated at 0.01–0.05% dry weight in aerial parts. (3) Flavonoids — including quercetin and kaempferol glycosides at trace concentrations (~0.1–0.5 mg/g dry weight). (4) Phenolic acids — chlorogenic acid and caffeic acid derivatives present at approximately 0.5–2.0 mg/g dry weight. (5) Fixed oils in seeds — comprising approximately 20–25% of seed weight, with fatty acid composition including oleic acid (~30%), linoleic acid (~40%), and palmitic acid (~15%). (6) Proteins in seeds — approximately 15–18% crude protein by dry weight, though consumption is contraindicated. (7) Carbohydrates and fiber — seeds contain approximately 30–35% total carbohydrates and 5–8% crude fiber, but again, not relevant for dietary purposes. Bioavailability note: Tropane alkaloids are rapidly absorbed through mucous membranes, skin, and the gastrointestinal tract, with scopolamine demonstrating higher CNS penetration than atropine due to greater lipophilicity. The therapeutic-to-toxic ratio is extremely narrow; all parts of the plant are considered highly toxic and no part is approved for direct human consumption or self-medication.

Preparation & Dosage

No clinically studied dosage ranges are available as human clinical trials are absent. Standardization details for extracts or powders are not specified in the research. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Not recommended due to toxicity concerns and lack of safety data

Safety & Interactions

Datura metel is highly toxic and can cause severe anticholinergic poisoning, including delirium, hallucinations, seizures, coma, and death even in small amounts. The plant interacts dangerously with anticholinergic medications, antidepressants, and drugs affecting the central nervous system. It is absolutely contraindicated in pregnancy, breastfeeding, children, and individuals with heart conditions, glaucoma, or urinary retention. Professional medical supervision is essential if considering any form of datura-containing preparation.