Hermetica Superfood Encyclopedia
Ammi visnaga is a Mediterranean plant containing khellin, a bioactive compound that acts as a calcium channel blocker and smooth muscle relaxant. The herb has been traditionally used for respiratory conditions and urinary tract support through its vasodilatory and bronchodilatory mechanisms.
Origin & History
Ammi visnaga (Khella) is a flowering plant in the Apiaceae (carrot) family native to the Mediterranean region, North Africa, and the Middle East. The primary medicinal source comes from its dried fruits and seeds, which are processed through solvent extraction or distillation to obtain active compounds including γ-pyrones like khellin and visnagin.
Scientific Research
The research dossier reveals a notable absence of modern human clinical trials, RCTs, or meta-analyses for Ammi visnaga. While khellin derivatives inspired pharmaceutical development (including precursors to sodium cromoglycate), no specific PMIDs or study details are available in current literature searches.
Preparation & Dosage
No clinically studied dosage ranges are documented for Ammi visnaga extracts, powder, or standardized forms in the available research. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
Ammi visnaga (Khella) is a medicinal herb used primarily for its bioactive compounds rather than macronutrient content. As a dried herb/seed preparation, it contains negligible macronutrient contributions at therapeutic doses. Key bioactive compounds include: Furanochromones - khellin (0.3-1.2% in dried seeds/fruits, the primary active constituent) and visnagin (0.05-0.3% in dried fruits); Pyranocoumarins - khellinin and ammiol present in smaller trace concentrations; Flavonoids - including isorhamnetin and luteolin glycosides at approximately 0.1-0.5% total; Essential oils - linalool, camphor, and terpene compounds comprising roughly 0.2-0.5% of dried fruit weight. Fiber content in whole dried fruits is approximately 15-20% by dry weight, predominantly insoluble. Protein content is low at approximately 8-12% dry weight, with limited bioavailability. Minerals detected include potassium (~300-400mg/100g dried herb), calcium (~200mg/100g), magnesium (~50-80mg/100g), and trace iron. Vitamin content is minimal and not considered therapeutically significant. Bioavailability note: Khellin and visnagin are lipophilic compounds with enhanced absorption when taken with fatty foods; aqueous extracts deliver lower bioavailable furanochromone concentrations compared to ethanolic extracts. Standardized extracts are typically normalized to 12-15% khellin content.
How It Works
Khellin, the primary active compound in Ammi visnaga, functions as a calcium channel blocker by inhibiting L-type voltage-gated calcium channels in smooth muscle cells. This mechanism leads to smooth muscle relaxation in bronchial, vascular, and urinary tract tissues. Khellin also demonstrates phosphodiesterase inhibition, which increases cyclic AMP levels and enhances bronchodilation and vasodilation effects.
Clinical Evidence
Clinical evidence for Ammi visnaga remains limited, with most research consisting of small-scale studies and in vitro investigations. Traditional use documentation spans centuries, particularly in Mediterranean and Middle Eastern medicine for asthma and kidney stones. Modern pharmacological studies have confirmed khellin's smooth muscle relaxant properties, but large-scale randomized controlled trials are lacking. Current evidence is primarily based on traditional use patterns and preliminary laboratory research rather than robust clinical data.
Safety & Interactions
Ammi visnaga may cause photosensitivity reactions due to its furanocoumarin content, requiring sun exposure precautions during use. The herb can interact with calcium channel blockers and other cardiovascular medications, potentially enhancing hypotensive effects. Hepatotoxicity has been reported with high doses or prolonged use of khellin-containing preparations. Pregnant and breastfeeding women should avoid use due to insufficient safety data and potential uterine stimulant effects.
Also Known As
Frequently Asked Questions
What is the active compound in Ammi visnaga?
How does Ammi visnaga help with respiratory conditions?
Can Ammi visnaga cause sun sensitivity?
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Does Ammi visnaga interact with blood pressure medications?
Is Ammi visnaga safe for children or elderly individuals?
What is the most bioavailable form of Ammi visnaga — standardized extract, whole herb, or tea?
Who should avoid Ammi visnaga supplementation?
Conditions This May Help
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