Hai Fen 海粉 — Chinese Herbal Medicine

Hai Fen (海粉) At a Glance

• Herb: Hai Fen
• Chinese name: 海粉 (Hai Fen)
• Latin name: Pulvis Marinus (Dried Powdered Sea Foam / Marine Algae Powder)
• Nature: Cool
• Taste: Sweet, Salty
• Meridian: Lung
• Category: Nourishing blood and yin

Hai Fen, literally “sea powder,” is a dried marine preparation prized in classical materia medica for its dual action on the lungs: cooling smouldering deficiency heat while simultaneously replenishing the yin fluids that heat consumes. Its salty quality reaches deep to soften accumulations and resolve phlegm, while sweetness anchors its nourishing character in the lung organ system. Clinically it finds its place in chronic consumptive lung patterns where dryness, heat, and fluid depletion converge.

Actions & Therapeutic Effects

• Nourishes lung yin — replenishes fluid-essence to moisten dry lung tissue and ease parched throat and airways
• Clears deficiency heat — cools smouldering heat arising from yin insufficiency without damaging residual qi
• Resolves phlegm and softens hardness — salty nature disperses congealed phlegm and reduces nodular accumulations
• Moistens dryness and stops cough — restores fluidity to the lung network, calming dry, irritating cough
• Nourishes blood — supports yin-blood interdependence, useful in concurrent blood deficiency patterns
• Calms the chest and eases breathlessness — descends rebellious lung qi associated with yin vacuity

Clinical Applications in TCM

• Lung yin deficiency cough — dry, unproductive cough, scanty sticky sputum, afternoon fever; combine with Sha Shen, Mai Dong, and Chuan Bei Mu (modified Sha Shen Mai Dong Tang)
• Hemoptysis from lung heat or yin fire — blood-streaked sputum with five-palm heat; pair with Bai Mao Gen and Ou Jie
• Chronic consumptive wasting (肺痨) — progressive dry cough, night sweats, emaciation; used within formulas alongside Bie Jia and Di Gu Pi
• Scrofula and phlegm nodules of the neck — salty softening action; combined with Hai Zao, Kun Bu, and Xia Ku Cao
• Dryness-heat damaging lung and stomach fluids — thirst, dry mouth, irritability; support with Tian Hua Fen and Shi Hu
• Post-febrile yin injury with residual cough — lingering dry cough after warm-pathogen illness; add to Qing Zao Jiu Fei Tang base

Precautions & Safety

• Dosage: 10–30 g in decoction; powder form 3–6 g swallowed directly or blended into formula; prolonged decoction reduces efficacy — add near end of cooking
• Contraindicated in cold-phlegm patterns (thin, copious white sputum, cold limbs) or spleen-stomach cold deficiency with loose stools
• Use cautiously during pregnancy; salty, descending nature may be inadvisable in threatened miscarriage

Classical TCM Formulas

• Hai Fen Gao (海粉膏): Hai Fen concentrated as a paste — historical Yin-nourishing tonic.
• Modern use is extremely limited; adequate plant-based Yin tonics (Sha Shen, Mai Men Dong, Bai He, Yu Zhu) are preferred.

Herb Combinations

• Hai Fen (海粉) + Bai He (百合) + Mai Men Dong (麦门冬): nourishes Yin and moistens the Lung for chronic dry cough.
• Hai Fen (海粉) + Gou Qi Zi (枸杞子) + Ju Hua (菊花): nourishes Liver-Kidney Yin and brightens the eyes.
• Hai Fen is a relatively obscure medicinal rarely used in modern clinical practice; the above combinations are classical rather than evidence-based.

Pharmacology & Research

Mineral/Amino acids: supply bioavailable trace minerals (iodine, calcium) that support tissue nutrition and fluid balance.
Polysaccharides: exert expectorant and mucosal-moistening effects consistent with yin-nourishing action.
Anti-inflammatory constituents: reduce airway inflammation underlying deficiency-heat presentations.
Antioxidants: scavenge free radicals, supporting the lung’s defence against oxidative dryness injury.

Classical Descriptions

• “海粉味鹹而甘，性涼，入肺經，能清熱化痰，滋陰潤燥。” — *Ben Cao Gang Mu Shi Yi* (本草綱目拾遺), Zhao Xue-Min (趙學敏), Qing dynasty