补命门、利三焦。
味甘性热。肉润皮涩。（皮敛肺定喘、固肾涩精、今药中罕用、若用之、当胜金樱莲须
也。）
通命门。利三焦。润肠胃。悦肌肤。温肺补肾。治痿强阴。佐补骨脂。一木一火。大补下焦
。（胡桃属木、破故纸属火、有木火相生之妙、古云∶黄柏无知母、破故纸无胡桃、犹水母
之无虾也、时珍曰∶三焦者、元气之别使、命门者、三焦之本原、命门指所居之府而言、为
藏精系胞之物、三焦指分治之部而名、为出纳腐熟之司、一为体、一为用也、其体非脂非肉、
两肾中央、系着于脊、下通二肾、上通心肺、贯脑、为生命之原、
相火之主、精气之府、人物皆有之、生人生物、皆由此出、内经所谓七节之旁、中有小心是
也、难经误以右肾为命门、高阳生承谬撰脉诀、至朱肱、陈言、戴起宗始辟之、肾命相通、
藏精而恶燥、胡桃颇类其状、皮汁青黑、故入北方、佐破故纸、润燥而调血、使精气内充、
血脉通利、诸证自除矣。）三焦通利。故上而虚寒喘嗽。（洪迈有痰疾、晚对、上谕以胡桃三
枚、姜三片、卧时嚼服、即饮汤、复嚼桃姜如前数、静卧必愈、迈如旨服、旦而痰消嗽止、
洪辑幼子、病痰喘、梦观音、令服人参胡桃汤、服之愈、明日去皮、喘复作、仍连皮用、信
宿而瘳、盖皮能敛肺也。同葱白姜茶捣煎、发汗散寒。）下而腰脚虚痛。内而心腹诸痛。
外而疮肿诸毒。皆可除也。动风痰。助肾火。肺有痰热。命门火炽者。勿服。润燥养血。去
皮。敛涩连皮。油者有毒。故杀虫治疮。壳外青皮、压油。乌髭发。
Tonifies the Mingmen (Gate of Life), benefits the Sanjiao (Triple Burner).
Taste is sweet, nature is hot. The kernel is moistening, the skin is astringent. (The skin gathers Lung Qi and stabilizes asthma, secures the Kidney and astringes essence; it is rarely used in modern prescriptions, but if used, its efficacy would surpass that of Rosa laevigata fruit [Jinyingzi] and Lotus stamen [Lianxu].)
Unblocks the Mingmen, benefits the Sanjiao, moistens the intestines and stomach, beautifies the skin and muscles, warms the Lungs and tonifies the Kidneys, treats flaccidity syndromes (Wei syndrome) and strengthens sexual function, assists Psoralea corylifolia (Pogu Zhi). Walnut belongs to Wood, and Psoralea corylifolia belongs to Fire; their combination possesses the subtle effect of Wood generating Fire. Ancients said: "If Phellodendron bark (Huangbai) lacks Anemarrhena rhizome (Zhimu), or Psoralea corylifolia (Pogu Zhi) lacks Walnut, it is like the water jellyfish lacking shrimp." Li Shizhen said: "The Sanjiao is the special envoy of Yuan Qi (Original Qi); the Mingmen is the root source of the Sanjiao. 'Mingmen' refers to the residence organ, which stores essence and connects to the uterus; 'Sanjiao' is named after its functional regions, serving as the manager of intake, output, and digestion. One is Substance (Ti), the other is Function (Yong). Its substance is neither fat nor flesh; it lies between the two Kidneys, attaches to the spine, connects downward to both Kidneys, upward to the Heart and Lungs, and penetrates the brain. It is the origin of life, the master of Ministerial Fire (Xiang Huo), and the mansion of Essence and Qi. All humans and animals possess it; human reproduction and the generation of all things proceed from here. This corresponds to what the *Neijing* states: 'Beside the seventh vertebra, there is the 'Xiao Xin' (Careful Mind/Heart).' The *Nanjing* erroneously identified the right Kidney as the Mingmen. Gao Yangsheng propagated this error by compiling the *Mai Jue* (Pulse Classic). It was not until Zhu Gong, Chen Yan, and Dai Qizong that this was refuted. The Kidney and Mingmen are interconnected; they store Essence and abhor dryness. The walnut resembles the state of the Mingmen; its juice is green-black, thus entering the North (Kidney meridian). Assisting Pogu Zhi, it moistens dryness and regulates blood, causing Essence and Qi to fill internally and blood vessels to flow smoothly, thereby eliminating various symptoms."
Because the Sanjiao is unblocked and smooth, it treats upper-level deficiency-cold wheezing and coughing. (Hong Mai suffered from phlegm disease. In his later years, when responding to imperial inquiries, the Emperor decreed he chew three walnuts and three slices of ginger before bed, then drink some soup, and repeat chewing the walnut and ginger as before. Quietly lying down would ensure recovery. Hong Mai followed these instructions; by morning, the phlegm dissipated and cough stopped. When Hong Mai edited his works, he recorded that his young son suffered from phlegm-wheezing illness and dreamed of Guanyin, who instructed him to take Ginseng and Walnut Decoction [Renshen Hutang Tang]. After taking it, he recovered. The next day, the walnut skin was removed, and the wheezing recurred. Using the walnut with the skin again led to recovery within two nights, likely because the skin can gather Lung Qi. Crushed together with scallion white, ginger, and tea and decocted, it induces sweating and disperses cold.) Lower-level deficiency-pain in the waist and feet. Internal pain in the heart and abdomen. External sores, swellings, and various toxins. All can be eliminated.
However, it moves Wind and generates Phlegm, and aids Kidney Fire. Those with Phlegm-Heat in the Lungs or blazing Fire in the Mingmen should not consume it. Removing the skin moistens dryness and nourishes Blood; using it with the skin provides astringency. Walnuts that are oily are toxic, thus capable of killing parasites and treating sores. The green skin outside the shell, when pressed for oil, darkens beard and hair.