Hermetica Superfood Encyclopedia
Lobelia (Lobelia inflata) is a North American herb containing alkaloids like lobeline that act as nicotinic acetylcholine receptor agonists. The plant has been traditionally used for respiratory conditions, though clinical evidence in humans remains limited.
Origin & History
Lobelia inflata, known as Indian tobacco, is a North American annual herb native to the eastern United States and Canada, belonging to the Campanulaceae family. The plant's aerial parts, particularly seeds and leaves, are extracted using solvents like methanol or chloroform or through steam distillation to obtain its piperidine alkaloids, including lobeline as the predominant bioactive compound.
Scientific Research
The research dossier reveals a significant gap in human clinical evidence for Lobelia inflata, with no randomized controlled trials or meta-analyses found in PubMed. Available data is limited to preclinical studies showing lobeline's effects on multidrug-resistant tumor cells and animal models demonstrating antidepressant properties of β-amyrin palmitate through noradrenergic mechanisms.
Preparation & Dosage
No clinically studied dosage ranges for Lobelia inflata extracts, powders, or standardized forms are available in the current research. Historical and preclinical contexts do not specify doses used in trials, and standardization details (such as % lobeline content) are absent from human studies. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
{"macronutrients": {"protein": "Not significant", "fiber": "Not significant", "fat": "Not significant"}, "micronutrients": {"vitamin_c": "Trace amounts", "vitamin_a": "Trace amounts", "calcium": "Trace amounts", "iron": "Trace amounts"}, "bioactive_compounds": {"lobeline": "0.2-0.6% of the plant's dry weight", "\u03b2-amyrin palmitate": "Present in leaves, specific concentration not well-documented"}, "bioavailability_notes": "Lobeline is the primary alkaloid and is considered the most bioactive component, but its bioavailability is not well-studied in humans."}
How It Works
Lobelia's primary bioactive alkaloid lobeline acts as a partial agonist at nicotinic acetylcholine receptors, particularly α4β2 and α7 subtypes. This mechanism stimulates respiratory centers in the medulla oblongata and may influence neurotransmitter release including dopamine and norepinephrine. β-amyrin palmitate from lobelia leaves has demonstrated noradrenergic activation in preclinical models.
Clinical Evidence
Human clinical trials for lobelia are extremely limited, with most evidence coming from traditional use and animal studies. One small study examined lobeline for smoking cessation but showed no significant benefit compared to placebo. Animal studies suggest potential antidepressant effects through noradrenergic pathways, but these findings require human validation. Preclinical research indicates possible activity against multidrug-resistant tumor cells, though this remains in early investigational stages.
Safety & Interactions
Lobelia can cause significant side effects including nausea, vomiting, respiratory depression, and cardiac arrhythmias at higher doses. The herb may interact with nicotine replacement therapies and medications affecting the central nervous system. Lobelia is contraindicated during pregnancy and breastfeeding due to potential toxicity. The therapeutic window between effective and toxic doses is narrow, requiring careful dosing supervision.
Also Known As
Frequently Asked Questions
What is the active compound in lobelia?
Is lobelia safe for respiratory conditions?
Can lobelia help with smoking cessation?
What are lobelia's side effects?
How much lobelia is safe to take?
Is lobelia safe during pregnancy and breastfeeding?
Does lobelia interact with common medications?
What does current clinical research show about lobelia's effectiveness?
Conditions This May Help
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