Ya Dan Zi (Brucea javanica) — Dried Bitter Seed Herb, 1000g Bulk Food-Grade Botanical

Ya Dan Zi (Brucea javanica), also known as Old Duck Gall (老鸭胆) and Duck Egg Seed (鸭蛋子), is the dried mature seed of a traditional bitter botanical used in Chinese herbal practice. In Traditional Chinese Medicine (TCM), Ya Dan Zi is classified as a bitter, cold herb that enters the Large Intestine and Liver channels, traditionally valued for its cooling, drying, and clearing direction. This food-grade agricultural product is offered in a 1000g bulk pack for herbal preparation and traditional external or decoction use.

Key Selling Points

• Traditional bitter, cold TCM botanical seed
• Known as Ya Dan Zi, Old Duck Gall, Duck Egg Seed
• Food-grade agricultural product, 1000g bulk pack
• New-crop dried seeds, clean and whole
• Suitable for traditional decoction and herbal formulas

Quality & Sensory

Each batch consists of whole, dried Brucea javanica seeds with a dark brown to blackish outer shell and a pale, oily kernel within. The seeds have a faint, earthy, slightly bitter aroma. When decocted, they yield a deeply bitter, cooling infusion with a dark amber tone, characteristic of bitter cold herbs in the TCM materia medica.

Technical Specifications

Usage Scenarios

• Traditional herbal decoction formulas
• Herbal preparation under professional guidance
• Bulk botanical supply for herbal practitioners
• Traditional external herbal applications

Traditional Uses

In folk herbal practice, Ya Dan Zi is decocted in traditional formulas or prepared for external use, often paired with other bitter and cooling herbs. It has been used in regional herbal traditions for its clearing and drying properties, and appears in classical materia medica records as a potent bitter botanical. Due to its intense bitterness and strength, it is traditionally used in small, carefully measured amounts within compound formulas rather than as a daily tea.

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