Overview
Pinellia Tuber (姜半夏) is a processed form of the rhizome of Pinellia ternata, a plant native to East Asia. It has been used in Traditional Chinese Medicine (TCM) for centuries due to its therapeutic effects on respiratory and digestive systems. The herb undergoes specific processing (e.g., soaking, boiling) to reduce its natural toxicity while preserving its medicinal properties. It is often prescribed in TCM formulas to treat conditions like cough, excessive phlegm, nausea, and abdominal distension. In modern herbal markets, Pinellia Tuber is available in dried slices, granules, or powdered forms. Its efficacy and safety depend heavily on proper processing and dosage. B2B buyers should prioritize suppliers adhering to Good Agricultural and Collection Practices (GACP) to ensure consistent quality.
Physical and Chemical Properties
Pinellia Tuber exhibits a distinct earthy odor and a slightly bitter, pungent taste. Its active compounds include alkaloids (e.g., ephedrine), sterols, and polysaccharides, which contribute to its expectorant and antiemetic effects. The processed herb is typically off-white to light brown, with a hard, irregular texture. Solubility is limited to water, where it forms a slightly viscous solution. Unlike raw Pinellia, the processed tuber has reduced levels of irritants like calcium oxalate crystals, making it safer for internal use. Proper drying and storage are critical to prevent mold growth and maintain potency.
Main Applications
In TCM, Pinellia Tuber is a key ingredient in formulas targeting 'phlegm-dampness' syndromes, such as Banxia Houpo Tang (Pinellia and Magnolia Bark Decoction) for cough and chest congestion. It is also combined with herbs like ginger or licorice to mitigate nausea and vomiting, particularly in pregnancy-related morning sickness (under professional supervision). Beyond respiratory and digestive ailments, recent studies explore its potential anti-inflammatory and neuroprotective properties. However, clinical evidence remains preliminary, and applications are primarily rooted in traditional use.
Safety and Storage
Raw Pinellia contains toxic compounds (e.g., calcium oxalate raphides) that can cause oral irritation and swelling. Proper processing (e.g., soaking in ginger juice or vinegar) is mandatory to neutralize these effects. Processed Pinellia Tuber should still be used cautiously, with typical TCM dosages ranging from 3–9 grams per day. Storage requires a moisture-free environment to prevent spoilage. Vacuum-sealed packaging or desiccant-containing containers are recommended for bulk purchases. Suppliers must provide documentation confirming processing methods and safety testing.
B2B Procurement Guide
B2B buyers should prioritize suppliers certified by regulatory bodies like the China Food and Drug Administration (CFDA) or compliant with international standards (e.g., USP Herbal Compendium). Key procurement criteria include: batch-specific testing for alkaloid content, absence of heavy metals/pesticides, and traceability to cultivation sites. Pricing varies by origin (e.g., Sichuan-grown Pinellia commands premium prices) and processing quality. Negotiate contracts with allowances for third-party lab verification. Long-term partnerships with GACP-certified farms can ensure supply chain stability.
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