Deng Xin Cao (Juncus effusus) — Dried Unsulfured Medulla for Cooling Soups & Teas

Deng Xin Cao (Juncus effusus), known in Traditional Chinese Medicine (TCM) as Dēng Xīn Cǎo (灯芯草) and commonly called Common Rush Medulla, is the dried stem pith of a gentle, cooling food herb. For centuries it has been prized as a mild heat-clearing, heart-calming herb used in light soups, summer decoctions, and daily teas. Its nature is sweet, bland, and slightly cold, making it a soft yet effective herb for clearing heat, easing restlessness, and promoting smooth fluid passage.

Key Selling Points

• Traditional heat-clearing food herb
• Dried unsulfured Juncus effusus medulla
• Naturally sun-dried, no sulfur
• Ideal for cooling soups and teas
• 500g bulk food-herb pack

Quality & Sensory

Each batch is naturally sun-dried to preserve its pale ivory to light straw color, fine fibrous texture, and faint grassy aroma. When simmered, the medulla softens and yields a light, subtly sweet infusion with a clean, refreshing finish that blends easily into broths without overpowering other ingredients.

Technical Specifications

Usage Scenarios

• Chinese-style cooling soup
• Summer herbal tea blends
• Congee and light porridge
• Seasonal heat-clearing decoctions
• Soup-pack ingredient

Traditional Uses

In folk herbal practice, Deng Xin Cao is decocted into light soups, summer teas, and gentle cooling formulas to support daily balance during warm seasons. It is a common ingredient in Cantonese-style heat-clearing soup packs, where it pairs with ingredients like lotus plumule, bamboo leaf, and winter melon. As a tea, it is brewed alone or blended with chrysanthemum and honeysuckle for a mild, refreshing infusion.

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