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Shennong Bencao Jing
026 / 030
Zhishi (Immature Bitter Orange) — classical plate
Aurantii Fructus Immaturus · Immature Bitter Orange Plate 026
Aurantii Fructus Immaturus
枳实 Zhishi
Immature Bitter Orange
Fructus Aurantii Immaturus
Nature & FlavorBitter, pungent; slightly cold
ChannelsSpleen, Stomach, Large Intestine
Actions
Breaks qiDisperses accumulationTransforms phlegmRemoves stuffiness
Six ChannelsYangming qi stagnation, excess-pattern stuffiness and fullness
The ClassicThe original text

「味苦寒。主大风在皮肤中，如麻豆苦痒，除寒热结，止痢，长肌肉，利五脏，益气轻身。」

Bitter in flavor, cold. It treats great wind in the skin, itching like hemp seeds, removes cold-and-heat binding, stops dysentery, grows muscle, benefits the five organs, and boosts qi to lighten the body.

RootBro's note — 'Breaks qi, disperses accumulation' is zhishi's core — fiercer than zhiqiao (the mature fruit). In Da Chengqi Tang: dahuang drains heat, mangxiao softens hardness, zhishi moves the qi, houpo removes fullness. Four herbs, four precise jobs, none dispensable.
PhD InsightA systems-biology reading
Key constituents synephrine and flavonoids: synephrine is an adrenergic-receptor agonist that strengthens gastrointestinal smooth-muscle contraction and markedly promotes gut motility.
Synephrine · 辛弗林
α₁ receptor agonism → gastrointestinal smooth muscle contracts ↑ → peristalsis accelerates (moving qi). It also suppresses relaxation of the gastroesophageal sphincter → prevents reflux. Its flavonoids inhibit PDE → cAMP ↑ → smooth muscle relaxes (two-way regulation).
Zhishi vs. houpo, the division of labor: zhishi acts mainly on the stomach and proximal intestine (breaking qi), houpo mainly on the distal intestine and the qi dynamic of the whole body (removing fullness). Together in Da Chengqi Tang they cover the entire digestive tract — a top-to-bottom, systematic unblocking of the qi mechanism.
Logic PairingClassical pairings
Da Chengqi Tang (Major Order-the-Qi Decoction)Xiao Chengqi Tang (Minor Order-the-Qi Decoction)Zhishi Xie Bai Guizhi Tang (Immature Bitter Orange, Chinese Chive & Cinnamon Twig Decoction)Si Ni San (Frigid Extremities Powder)Zhi Zhu Tang (Immature Bitter Orange & Atractylodes Decoction)
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