Eclipta Classic Formulas — Natural Herb Library

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Nourishes Liver and Kidney yin - Han Lian Cao is classically used for dizziness, tinnitus, weak low back and knees, premature graying, and other deficiency signs rooted in depleted Liver-Kidney essence.
Cools blood and stops bleeding - it is a standard gentle hemostatic herb for uterine bleeding, hematuria, nosebleeds, and other bleeding patterns with heat or yin deficiency in the background.
Benefits the hair and preserves essence - traditional use strongly associates Han Lian Cao with darkening hair, reducing hair shedding, and treating signs of premature aging linked to deficiency.

Er Zhi Wan - the classic Han Lian Cao and Nu Zhen Zi pair for Liver-Kidney yin deficiency, tinnitus, hair changes, and constitutional depletion.
Bleeding formulas may combine Han Lian Cao with Ce Bai Ye, Bai Mao Gen, or other blood-cooling medicinals when heat and bleeding coexist.
Modern hair and premature-graying formulas frequently use Han Lian Cao as the core essence-preserving herb.

Later materia medica consistently describe Han Lian Cao as a sweet-sour, cooling herb that supplements deficiency while stopping bleeding.
Traditional texts link its blackening-hair reputation to nourishing Liver blood and Kidney essence rather than to simple topical cosmetic action.
Its dual role in bleeding and deficiency makes it one of the more elegant examples of a hemostatic herb that simultaneously treats the root.