1. Lotus Seed Core: Also known as Lian Yi or Ku Yi. It contains liensinine, isoliensinine, hyperin, rutin, and flavonoids. It tastes bitter and is cold in nature, with effects of calming the mind and lowering blood pressure. Modern experimental medicine has confirmed that lotus seed core has the effect of calming human sexual desire. Women who are physically strong while their husbands are not in good health can take it regularly; widowed women can also often drink lotus seed core tea. When introducing the effects of lotus seed core, "Sui Xi Ju Yin Shi Pu" states: "It astringent fluids, stops sweating, clears heat, nourishes the spirit, stops bleeding, secures essence, so it is said to be able to pacify the fire of the monarch and minister."
2. Winter Melon: Also known as Zhen Gua or Bai Dong Gua. It contains crude fiber, niacin, and more. It tastes sweet and is cool in nature, capable of reducing desire-fire and clearing heart-heat. Modern medicine has confirmed that eating winter melon regularly can alleviate manic symptoms, relieve vexation and irritability. "Ben Jing Shu" says: "Winter melon internally possesses the qi of yin earth and externally is invaded by frost and dew, therefore its taste is sweet, its qi is slightly cold, and its nature is cold and beneficial."
3. Water Chestnut: Also known as Shui Ling or Sha Jiao. It contains β-sitosterol and ergosta-4,22-dien-3-one, etc. It tastes sweet and is cold in nature, with the effect of nourishing the spirit and strengthening the will, and can pacify the desire-fire of both men and women. "Shi Liao Ben Cao" points out: "Among all fruits in the water, this thing produces the most cold qi,... it makes people feel cold, damages yang, and causes the jade stem to wither."
4. Kale: Also known as Yu Man Jing or Pi Lan. It contains cellulose, carbohydrates, and more. It tastes sweet and is pungent in nature. In addition to its effects of promoting urination, resolving phlegm, detoxifying, and expelling wind, it also has the side effect of consuming a person's true qi. Long-term consumption of kale has the effect of inhibiting sex hormone secretion. "Ben Qiu Yuan" describes it as "sweet and pungent, cold, consuming qi and damaging blood."