Is Lime Water Good for Colds?

Partly: if it helps you drink enough fluid, lime water supports hydration and can soothe a dry throat during a cold, but it does not treat the virus. Research on citrus compounds is preliminary and does not establish that lime water treats a cold or flu. Prepare it with clean ingredients, keep it refrigerated, and seek medical advice if symptoms are severe or worsening.

Can lime water help with a cold?

Lime water may be useful as a comforting drink when you have a cold, especially if its flavor makes plain water easier to drink. Staying hydrated helps replace fluid you lose and can relieve the feeling of a dry mouth or throat.

The benefit comes mainly from the water, not from a proven cold-fighting effect of lime. Lime water is not a substitute for medical treatment when you need it. Colds and flu are caused by different viruses, and lime water has not been shown to treat either infection. For more hydration options, see the best drinks for colds and flu.

How might lime water help?

When you are ill, a sore throat, reduced appetite or fever may make it harder to drink normally. Lime adds flavor without requiring a sweetener, so it may encourage you to sip fluids. Drink according to your thirst unless a clinician has given you different fluid instructions.

A cool or gently warmed drink may feel soothing on a dry throat. Lime water does not work as a decongestant, though, and it will not reliably stop coughing or clear a blocked nose. If the acidity stings your throat, dilute it further or choose plain water instead.

Lime contains vitamin C, which contributes to normal immune function. The amount that transfers into water from slices is uncertain, so a glass of lime water should not be treated as a measured vitamin C dose. Adding lime also does not make water detoxify the body: the liver and kidneys do most of that work, while the lungs and gut help eliminate waste.

What does the evidence say about lime and colds?

Research has not directly shown that lime water prevents a cold, shortens one or reduces its symptoms. The available studies concern isolated citrus compounds or extracts, not people drinking lime water.

For example, a 2001 laboratory report found that a compound isolated from Citrus junos, a citrus fruit, showed activity against influenza A virus. That finding does not show that lime water has the same effect in the body.

Similarly, a 2024 laboratory and computer-model study investigated citrus-derived compounds and enzymes called neuraminidases. Such early research can help scientists identify compounds for further study, but it cannot establish an effective drink, amount or treatment for people with colds or flu.

How can you use lime water during a cold?

Make a mild infusion and sip it if you enjoy it. This recipe uses sliced lime rather than squeezing or blending the fruit, so the amount of lime material and nutrients in the water will vary.

Ingredients

• 1 lime, about 60 g (2 oz), thinly sliced
• 1 liter (about 4¼ cups) safe drinking water

Steps

1. Wash the lime under running water and slice it with a clean knife.
2. Add the slices and water to a clean covered pitcher.
3. Refrigerate for 2–4 hours to develop the flavor.
4. Remove the lime slices or strain the water after about 4 hours to limit bitterness.
5. Pour a serving and drink it cool, or gently warm it if that feels better on your throat.

Keep the remaining lime water refrigerated and drink it within 24 hours for the best flavor. Discard it after 2–3 days, or sooner if it becomes cloudy, slimy or sour-smelling. Do not leave it at room temperature for more than a few hours.

There is no proven therapeutic amount to drink. The aim is comfortable hydration, not drinking as much lime water as possible.

Who should be careful, and when should you see a doctor?

Lime is acidic. If you have reflux, mouth sores, sensitive teeth or a sore throat that stings with acidic drinks, dilute the lime water or avoid it. Rinsing your mouth with plain water afterward can help limit acid exposure to tooth enamel.

If you have kidney disease, heart failure or another condition for which you have been told to limit fluids, follow your care team's advice rather than increasing your intake on your own. For infants, ask a pediatrician about appropriate fluids; young babies should not be given lime water in place of breast milk or formula.

Contact a clinician promptly if you may have flu and are pregnant, are an older adult, have a weakened immune system or have a chronic medical condition. Flu can be more serious for these groups, and medical treatment may be time-sensitive. Also seek advice if symptoms worsen, improve and then return, or make it difficult to drink.

Get urgent medical help for trouble breathing, chest pain, confusion or signs of severe dehydration, such as very little urine or being unable to keep fluids down. These are not symptoms to manage with lime water alone.