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Tonic Drinks & Waters

Lemon Pearl Barley Water

traditionally associated with supporting immunity, clearing heat, and aiding digestion in children

In short: Lemon Pearl Barley Water is a tonic drinks & water that traditionally associated with supporting immunity, clearing heat, and aiding digestion in children. It is most often made for respiratory & lung wellness, digestive wellness, children's wellness. Total time about 1 hr 5 min. Key ingredients: lemon, job's tears (coix), rock sugar.

By · Published under our editorial policy · Research library

Prep
10 min
Cook
55 min
Total
1 hr 5 min
Makes
3–4 cups
Respiratory & Lung WellnessDigestive WellnessChildren's WellnessImmune Support
Lemon Pearl Barley Water

Why people make this drink

When respiratory illnesses circulate through kindergartens and schools, parents in Cantonese-speaking households often reach for this simple, naturally sweet drink as a gentle daily support. Fresh lemon brings vitamin C, which is well established for supporting immune function, along with citric acid and natural antibacterial properties. A warm cup can also help loosen thick mucus that settles in the throat.

Pearl barley — the raw, unroasted variety — is a staple of traditional Chinese food therapy. It is associated with clearing dampness and mild heat from the body, supporting the spleen and stomach, reducing fluid retention, and calming the mind. In some traditional sources it is also said to have mild antiviral properties. Together, lemon and barley create a drink that is both pleasant to taste and gently supportive of health during the seasons when children are most exposed to illness.

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.

  • Job's tears (coix) · Randomized controlled trial · 2024
    Myeloperoxidase activity rose significantly in the placebo group after 8 weeks but showed no significant change in the adlay tea group. Vascular endothelial function improved in the adlay group, especially in those over 40.Limitation: Participants were healthy adults and the outcomes were surrogate markers, so the results say little about clinical disease outcomes. Tea is a polyphenol-rich extract, not whole grain.PubMed 38945894 · 2 more job's tears (coix) 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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