（畜）入肝补血通润心肺与肾
阿胶（专入肝。兼入肺肾心）。味甘气平。质润。专入肝经养血。何书又言除风化痰。
盖以血
因热燥。则风自生。阿胶得阿井纯阴之济水。又得纯黑补阴之驴皮。（宗 曰。驴皮煎胶。
取其发散皮肤之外也。用乌者取乌色属水。以制热则生风之义。如乌卵乌鸡之类皆然。）气
味俱阴。既入肝经养血。复入肾经滋水。水补而热自制。故风自尔不生。（藏器曰。诸胶皆
主风。止泄补虚。而驴皮主风为最。）又胶润而不燥。胶性既能润肺。复能趋下降浊。使痰
不至上逆耳。至于痔漏肠风。衄血血淋下痢。（痢因热成。）暨经枯崩带。胎动痈肿。治克有
效。亦是因血枯燥。伏热而成。故能得滋而解。此为血分养血润燥。养肺除热要剂。不似首
乌功专入肝。补血祛风。乌须黑发。而于肺经润燥定喘则未及。鹿胶性专温督与冲以益其血
。而于肺经清热止嗽则未有。龟胶力补至阴。通达于任。退热除蒸。而于阴中之阳未克有补
。古人云。阿胶养神。人参益气。正谓此也。以黑光带绿。至夏不软者良。削炒成珠。或面
炒。蛤粉炒。（去痰）蒲黄炒。（止血）或酒化水化为用。以山药为使。恶大黄。牛胶功与阿
胶
相似。（陈自明云。补虚用牛皮胶。去风用驴皮胶。时珍曰。阿胶难得。真牛皮胶亦可权用
。其性味皆平补。宜于虚热。若鹿角胶则性味热补。非虚热者所宜。不可不详辨也。）治能
养血祛风。然总不如阿胶养血治风之为最耳。
阿胶（专门入肝经，兼入肺、肾、心经）。味甘，气平，质地滋润，专门入肝经以养血。为什么有些书籍又说它能祛风化痰呢？这是因为血液因热燥而生风，阿胶汲取阿井纯阴之济水，又结合纯黑补阴的驴皮。（李时珍《本草纲目》引宗奭曰：驴皮煎制成胶，取其发散皮肤之外邪的作用。使用黑色的驴皮，是因为黑色属水，用以制约“热极生风”的道理。如乌卵、乌鸡等都是这个原理。）其气味均属阴，既然入肝经养血，又入肾经滋补肾水，肾水充足则内热自被制约，因此风邪自然不生。（孟诜《食疗本草》引藏器曰：各种胶都主治风病、止泻、补虚，而驴皮胶祛风效果最好。）另外，胶滋润而不干燥，胶性既能润肺，又能趋下降浊，使痰液不致上逆。至于痔疮漏管、肠风便血、鼻衄、血淋、下痢（痢疾因热而成），以及月经枯竭、崩漏、带下、胎动不安、痈肿等症，治疗都能取得显著效果。这也是因为这些病症多因血液枯燥、伏热所致，所以能通过滋阴滋润而解除。这是血分中养血润燥、养肺除热的关键药剂。不像首乌功效专入肝经，补血祛风，乌须黑发，而在肺经润燥定喘方面则有所不及；鹿胶性质专门温补督脉与冲脉以益血，而在肺经清热止嗽方面则没有作用；龟胶力量在于补至阴，通达任脉，退热除蒸，但对于阴中之阳却未能有补益作用。古人说：“阿胶养神，人参益气”，正是说的这个道理。以颜色黑亮带绿，夏天不发软者为优良。可切片炒成珠状，或用面炒、蛤粉炒（去痰）、蒲黄炒（止血），或酒化水后使用。以山药为引经药，忌与大黄同用。牛胶的功效与阿胶相似。（陈自明说：补虚用牛皮胶，祛风用驴皮胶。李时珍说：阿胶难得，真正的牛皮胶也可以权宜使用。它们的性味都是平补，适宜于虚热证。若鹿角胶则是热补之性，不适合虚热证患者，不可不详细辨别。）牛胶能养血祛风，但总不如阿胶在养血治风方面最为出色。
(Animal-derived drugs) Enter the Liver channel to nourish blood, and unblock and moisten the Heart, Lungs, and Kidneys.
Ejiao (Donkey-hide Gelatin) (Specifically enters the Liver channel, and concurrently enters the Lung, Kidney, and Heart channels). It has a sweet taste and neutral nature, with a moist texture. It specifically enters the Liver channel to nourish blood. Why do some texts state that it dispels wind and transforms phlegm? This is because when blood becomes dry due to heat, wind arises spontaneously. Ejiao absorbs the pure yin Ji River water from A Well, combined with the donkey skin, which is purely black and nourishes yin. (Zong Shuo: Donkey skin is decocted into gelatin to leverage its ability to disperse pathogens on the exterior of the skin. The use of black donkey skin is based on the principle that black corresponds to Water, thereby controlling the concept that "extreme heat generates wind." Similar principles apply to black eggs and black chickens.) Its flavor and qi are both yin. Having entered the Liver channel to nourish blood, it further enters the Kidney channel to nourish kidney water. When kidney water is replenished, internal heat is naturally controlled, and thus wind does not arise. (Cang Qi said: All gels primarily treat wind, stop diarrhea, and tonify deficiency, but donkey-hide gelatin is the most effective for dispelling wind.) Furthermore, gelatin is moistening and not drying. Its nature can moisten the Lungs and descend turbidity, preventing phlegm from counterflowing upward. Regarding hemorrhoids, fistulas, intestinal wind bleeding, epistaxis, hematuria, and dysentery (dysentery caused by heat), as well as amenorrhea, metrorrhagia, leukorrhea, fetal restlessness, and carbuncles and swellings, treatment yields significant effects. These conditions also arise from blood dryness and latent heat; therefore, they are resolved through nourishing and moistening. This is a crucial agent for nourishing blood, moistening dryness in the Blood level, nourishing the Lungs, and clearing heat. It differs from He Shou Wu (Polygonum multiflorum), whose efficacy specializes in entering the Liver channel to nourish blood, dispel wind, darken hair, and blacken beard, yet falls short in moistening dryness and calming asthma in the Lung channel; Lu Jiao Jiao (Deer Antler Gelatin) specializes in warming and tonifying the Du and Chong vessels to benefit blood, but lacks efficacy in clearing heat and stopping cough in the Lung channel; Gui Ban Jiao (Tortoise Shell Gelatin) excels in tonifying extreme yin and unblocking the Ren vessel, clearing heat and steaming bone disorder, yet cannot tonify yang within yin. The ancients said, "Ejiao nourishes the spirit, Renshen (Ginseng) benefits qi," precisely referring to this. The best quality is characterized by a black luster with a green tint and does not soften in summer. It can be sliced and stir-fried into beads, or stir-fried with flour, clam shell powder (to resolve phlegm), or Puhuang (Typha pollen) (to stop bleeding), or dissolved in wine and water for use. Yam (Shan Yao) serves as a guiding herb. It is incompatible with Dahuang (Rhubarb). Niu Jiao (Ox-hide Gelatin) has effects similar to Ejiao. (Chen Ziming stated: Use ox-hide gelatin for tonifying deficiency, and donkey-hide gelatin for dispelling wind. Li Shizhen stated: Ejiao is difficult to obtain; authentic ox-hide gelatin can be used as a substitute. Their properties and flavors are both mildly tonic, suitable for deficiency-heat patterns. In contrast, Lu Jiao Jiao (Deer Antler Gelatin) has a hot and tonic nature and is not suitable for those with deficiency-heat. Careful distinction is necessary.) Niu Jiao can nourish blood and dispel wind, but overall, it is not as superior as Ejiao in nourishing blood and treating wind.