Long Kui Zi (Solanum nigrum) — Dried Black Nightshade Seeds, Food Herb for Decoction & Powder

Long Kui Zi (Solanum nigrum), also known as Black Nightshade Seed or by its folk names Hei Tian Tian (黑天天) and Fei Tian Long (飞天龙), is the dried ripe seed of a traditional food herb known in Traditional Chinese Medicine (TCM) as Lóng Kuí Zǐ (龙葵子). For generations, Long Kui Zi has been valued as a cooling, clearing herb used in decoctions and folk formulas to disperse heat, promote diuresis, and ease discomfort. Its nature is bitter, slightly sweet, and cold, making it a gentle yet focused herb for clearing heat and supporting fluid balance.

Key Selling Points

• Traditional heat-clearing food herb
• Dried ripe Solanum nigrum seeds
• Known in folk practice as Hei Tian Tian and Fei Tian Long
• Suitable for decoction, powder, and herbal blends
• Sun-dried, clean 500g pack

Quality & Sensory

Each batch is sun-dried to preserve the seeds' small, round shape, dark brown-to-black color, and smooth, slightly glossy surface. They carry a mild, earthy, faintly grassy aroma. When decocted, the seeds yield a light amber infusion with a subtle bitter-sweet taste and a clean, drying finish, typical of cooling TCM herbs.

Technical Specifications

Usage Scenarios

• Traditional herbal decoction
• Herbal tea blends with other cooling herbs
• Ground into powder for custom formulas
• Folk wellness soups and congee
• Ingredient in seasonal heat-clearing blends

Traditional Uses

In folk herbal practice, Long Kui Zi is decocted alone or combined with other cooling herbs to support the body's natural clearing of heat and to promote smooth fluid movement. It appears in traditional formulas alongside herbs like dandelion, honeysuckle, and plantain seed. In daily life, it is brewed as a light bitter tea, added to congee, or ground into powder for custom herbal blends. As a food herb, it is also used in seasonal soups during warm months.

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