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Wild Watercress and Snakehead Fish Soup

traditionally nourishes yin, clears internal heat, and soothes dry throat and joint discomfort

In short: Wild Watercress and Snakehead Fish Soup is a soup that traditionally nourishes yin, clears internal heat, and soothes dry throat and joint discomfort. It is most often made for respiratory & lung wellness, cooling & summer heat, sleep & calm. Total time about 130 min. Key ingredients: ginger, red dates.

By · Published under our editorial policy · Research library

Prep
10 min
Cook
120 min
Total
130 min
Makes
1.2–1.5 L
Respiratory & Lung WellnessCooling & Summer HeatSleep & CalmBone & Joint WellnessEveryday Balance
Wild Watercress and Snakehead Fish Soup

Why people make this soup

In traditional Chinese medicine, “yin deficiency” refers to a state where the body’s moistening and cooling reserves are depleted — often showing up as a dry mouth, burning feeling in the palms or soles, mild gum bleeding, haemorrhoid flare-ups, or achy joints. This classic Cantonese folk soup is made to address that pattern. Wild watercress (ye ge cai, sometimes called tang ge cai or pond cress) grows along stream banks and is available at Chinese herb shops and some Asian grocers. It has a clean, slightly peppery flavour, and tradition holds that it clears internal heat from the bones and joints. Snakehead fish, pan-fried briefly before going into the pot, gives the soup a rich golden colour and a warming, protein-rich base. Together, the soup is considered especially good as a seasonal autumn drink — when dryness tends to creep in — but is useful year-round.

What studies say about the key ingredients

Traditional use is not the same as clinical proof. Here is the strongest human research we found for each ingredient, limitations included.

  • Ginger · Meta-analysis, 23 studies · 2022
    Overall, acute and delayed nausea and vomiting did not differ significantly between ginger and control groups. A subgroup taking 1 g/day or less for over four days had less acute vomiting (OR 0.30).Limitation: Clinical heterogeneity between trials required subgroup analyses, and the authors state that sufficiently large, high-quality RCTs are still needed.PubMed 36501010 · 3 more ginger studies
  • Red dates · Meta-analysis, 483 participants · 2025
    Jujube was associated with significantly lower BMI and triglycerides, and lower fasting blood sugar in people with type 2 diabetes. LDL and total cholesterol fell only in some subgroups. HDL, AST and ALT did not change significantly.Limitation: The authors state the overall quality of the evidence is limited, and results varied significantly by dose, treatment duration and disease type.PubMed 40399274 · 3 more red dates studies

From the Nourilo Research Library. Findings come from specific doses, extracts and populations and may not apply to a home-cooked recipe.

Safety first — read before you cook

This is a traditional food, not a treatment. Please check with your doctor or pharmacist before making it a regular part of your diet if you:

  • are pregnant or breastfeeding, or are cooking for a young child;
  • take regular medicines — especially blood thinners, blood-pressure, diabetes or immune-suppressing drugs;
  • have a kidney, liver or heart condition, or a known food allergy.

Stop eating it and seek advice if you notice an allergic reaction or feel unwell. Safety notes reviewed 8 October 2026 · How we write safety notes

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