Houttuynia cordata has many benefits and effects, and its culinary uses are simple and varied

Houttuynia cordata, also known as zhe'ergen or cei'ergen, is a perennial herbaceous plant in the family Saururaceae, named for the distinct fishy odor released when its stems and leaves are crushed. It is especially common in southwestern China, where it is both a traditional wild vegetable and a common medicinal and edible plant; both the tender rhizomes and young leaves can be used in cooking.

Traditional medicine holds that Houttuynia cordata is slightly cold in nature and pungent in taste, with effects of clearing heat and detoxifying, reducing abscesses and discharging pus, and promoting urination to treat strangury. It is often used to help with lung-heat cough and sore, swollen throat. In modern times, many studies have also focused on its anti-inflammatory and antibacterial effects, though the specific effects vary from person to person. In daily consumption it is mainly a healthful vegetable with a distinctive flavor and cannot replace proper medical treatment.

As for how to eat it, the most common preparation is cold-tossed zhe'ergen: wash the tender roots, cut them into short sections, and mix with chili oil, soy sauce, vinegar, minced garlic, and other seasonings. The texture is crisp and tender, with a striking flavor. In addition, Houttuynia cordata can be stir-fried with cured meat, used in soups, cooked with eggs, or dried and steeped or boiled in water as a tea substitute. In some regions, there is also a custom of using it to stew meat or make congee.

It should be noted that Houttuynia cordata is cold in nature, so people with weak and cold spleen and stomach or who are prone to diarrhea should not eat too much of it, and special populations are advised to consult a physician before eating it. When gathering it yourself, avoid polluted watersides and farmland, and wash it thoroughly before eating. If using it as medicine, it is best to do so under a doctor's guidance and avoid eating it in large amounts over the long term.