Overview
Astragalus membranaceus root (Huang Qi) is a perennial herb native to northern China and Mongolia, with its dried root being the primary medicinal component. It has been used in Traditional Chinese Medicine (TCM) for over 2,000 years as a Qi-tonifying herb. The root undergoes careful harvesting (typically from 4-7 year-old plants) and sun-drying processes to preserve its bioactive compounds. Modern research confirms its immunostimulatory effects, primarily attributed to polysaccharides and saponins like astragaloside IV.
Physical and Chemical Properties
The dried root exhibits a fibrous texture with yellowish cross-sections. Its active components include 3-8% polysaccharides (immune-active F3 fraction), 0.5-1.5% saponins (astragalosides), and 0.3-0.8% flavonoids like formononetin. Quality indicators include total polysaccharide content (≥5% for pharmaceutical grade) and astragaloside IV levels (≥0.04% per Chinese Pharmacopoeia standards). The material is hygroscopic, requiring controlled humidity during storage to prevent mold growth.
Main Applications
In B2B markets, astragalus root serves three primary sectors: TCM decoction pieces (sliced roots), standardized extracts (20-70% polysaccharides), and raw material for capsule/tablet formulations. Pharmaceutical companies utilize it in immune-support formulations, particularly in adjuvant cancer therapies. The supplement industry incorporates it in adaptogenic blends, often combined with ginseng or reishi mushroom. Emerging applications include functional foods (beverages, granolas) and veterinary products for livestock immunity enhancement.
Safety and Storage
Properly processed astragalus root has an excellent safety profile, with LD50 >15g/kg in rodent studies. However, autoimmune conditions may require medical supervision due to its immunomodulatory effects. Storage requires protection from moisture (relative humidity <65%) and pests. Vacuum-sealed packaging with desiccants is recommended for long-term preservation. Industrial buyers should request mycotoxin testing reports, especially for bulk purchases exceeding 100kg.
B2B Procurement Guide
Key procurement considerations include geographical origin authentication (premium grades from Gansu province), harvest timing (autumn-dug roots have higher active compounds), and processing methods (sulfur-free drying preferred). Reputable suppliers provide COA (Certificate of Analysis) with HPLC verification of astragaloside IV and polysaccharide content. MOQs typically start at 25kg for sliced roots, with container-load (20MT+) pricing offering 15-30% discounts. Organic and EU/USP certification commands 20-40% price premiums.
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