Barley Water (Jau Ka Pani, Jav Nu Pani): Benefits, Kidneys

Short answer: barley water is jau ka pani in Hindi and jav nu pani in Gujarati. It is a light, low-calorie drink. It helps you take in more fluid. That fluid is the part that helps your kidneys. The cholesterol and sugar benefits belong to the barley grain. You strain that grain out. So drink it, but eat the barley too. If you have kidney disease, ask your doctor first.

What Barley Water Is

Short answer: it is the liquid left after you boil barley grains in water. Nothing is added. The grain is strained out.

Barley water is jau ka pani. You boil barley grains in water for about half an hour. Then you pour the liquid off through a strainer.

What you get is pale and faintly cloudy. It tastes mild and slightly nutty.

Indian hospitals have served it for a long time. It is easy to drink when nothing else appeals. That is most of its reputation. It is a fair one.

Jau, jav, yava: the same grain, different kitchens

Many readers search for this in their own language. The Indian Food Composition Tables 2017 list every regional name. Here they are in one place.

Source: IFCT 2017, food code A004, Hordeum vulgare.

So jau ka pani, jav nu pani and jo water all mean barley water. Yes, jau and barley are the same thing.

Jau ka pani, jav nu pani, jo ka pani: all mean barley water

Every one of these names means barley water in English. Pani means water. Jau is barley in Hindi, and jav is barley in Gujarati. In Gujarati, nu means of, so jav nu pani is the water of barley.

• Jau ka pani and jau water: Hindi. In English, barley water.
• Jav nu pani, jau nu pani and jav water: Gujarati. In English, barley water.
• Jav ka pani and jaw ka pani: Hindi words with the Gujarati name. In English, barley water.
• Jo pani, jo ka pani, joo water and jon ka pani: other ways to spell jau in English letters. In English, barley water.
• Barli ka pani: barli is the Assamese name in IFCT 2017. In English, barley water.

So when you search for jau water benefits, jav nu pani benefits or jo water benefits, you are asking about the same drink. The benefits are in the next sections.

What Is Actually in the Glass

Short answer: very little. The fibre and minerals sit in the grain. The grain is what you throw away. No study has measured how much crosses into the water.

Most articles skip this part. So let us do the sums in the open.

Barley is a genuinely good grain. IFCT 2017 measured Indian barley across six regions. Here is what it holds per 100 g.

Soluble fibre is the number that matters. Beta-glucan is a soluble fibre. That is the one barley is famous for. Soluble means it can dissolve into water.

Now put a normal recipe next to it. Most recipes use about 50 g of barley in a litre of water. That is roughly a quarter cup.

The ceiling: 50 g of barley holds about 2.8 g of soluble fibre. The US FDA sets its cholesterol threshold at 3 g of beta-glucan a day. Say every gram dissolved into your pot. It does not. Even then, one day of barley water falls short.

In practice most of that fibre stays in the grains. Those are the ones you tip into the strainer. Nobody has measured how much crosses over. We looked. No published study puts a number on it.

That is no reason to stop drinking it. It is a reason to stop expecting a cholesterol drug. And a very good reason to eat the strained grains.

Barley Water Benefits, Checked One by One

Short answer: the main jau water benefit is fluid. It is an easy, low-calorie way to drink more. That benefit is real. The cholesterol and sugar benefits belong to the grain. The diuretic claim traces back to an 1845 note in a dental journal.

Here is every common claim, and what the source behind it actually says.

The cholesterol claim, in full

The US Food and Drug Administration does allow a cholesterol claim on barley. It sits in federal regulation. The wording is precise.

The rule sets the level at 3 g or more per day of beta-glucan soluble fibre. It must come from whole oats or barley. To qualify, whole-grain barley needs at least 4 percent beta-glucan. It also needs at least 10 percent total dietary fibre. Milled barley, such as pearl barley, needs 4 percent beta-glucan and 8 percent total fibre.

The FDA added barley to the claim in a final rule in May 2006. It found that barley at that level lowers blood total and LDL cholesterol.

Notice what the rule does not say. It gives no percentage drop. And it is written about barley you eat. So see our cholesterol diet guide and put the grain in your food.

The diuretic claim, traced

Search for proof that barley water is a diuretic. You land on a paper called Barley-Water a Powerful Diuretic. It is indexed on PubMed. So it looks authoritative.

That paper ran in The American Journal of Dental Science in December 1845. It is a 180-year-old note in a dental journal. It is also the only PubMed paper making the claim. Treat it as folklore with a citation.

Barley water does make you go more often. So does any litre of liquid. That is the honest mechanism.

Barley Water and Your Kidneys: Three Different Questions

Short answer: is barley water good for kidneys? For healthy kidneys, yes, as an easy way to drink more fluid. For kidney patients, not always. Stones, urine infections and chronic kidney disease are three separate things. Barley water helps the first two only by adding fluid. For the third it can be a problem.

People search for barley water and kidneys with three different questions in mind. Each has a different answer. So we have split them.

1. Kidney stones

The National Kidney Foundation is blunt here. Once a stone has formed, nothing usually dissolves it. No drink will do it.

What works is stopping the next one. The Foundation says to drink enough fluid to make about 2.5 litres of urine a day. NIDDK says many health experts suggest six to eight glasses of about 240 ml a day, unless you have kidney failure. It calls enough liquid, mainly water, the most important thing you can do.

A real trial sits behind this. It ran for five years and was published in the Journal of Urology in 1996. Every patient had already passed one calcium stone. One group was told to drink a lot of water and change nothing else.

Borghi 1996: over five years, stones came back in 12 of 99 patients who drank more water. In the untreated group it was 27 of 100. They also took longer to return: 38.7 months against 25.1 months.

So the evidence supports volume. Barley water counts towards it. So does plain water, and plain water is free. Our daily water intake guide has the numbers.

2. Urine infections and UTIs

People state this one far too confidently online. Here is the official line.

NIDDK says researchers do not think diet prevents or treats bladder infections. A bacterial bladder infection is treated with antibiotics. Drinking more liquids helps flush the bacteria out and eases symptoms. On drinks, NIDDK says water is best.

So barley water during a UTI is fine. It may help you feel better, because it gets fluid into you. It is not a treatment. It does not replace seeing a doctor.

The one trial on burning urine: in 2025, doctors in Tehran gave 90 men either barley water or a dummy drink for one week. All of them had painful urination after radiotherapy for prostate cancer. Barley water did not ease the pain any better than the dummy drink. The men did like it more (Nazari et al., The Prostate, 2025).

That is true of lemon barley water too. Lemon adds taste, not a cure.

3. Chronic kidney disease

Here the popular advice can do real harm. It is also what our readers ask most often about jau atta.

Barley is not a low-mineral grain. USDA figures and the Indian food tables show what it carries.

Source: USDA FoodData Central, records 170283, 170284 and 170285. Indian row: IFCT 2017, food code A004, Tables 1 and 5.

Indian barley tested lower than the US hulled grain. IFCT 2017 lists 268 mg potassium and 178 mg phosphorus in 100 g. Wheat atta in the same tables has 311 mg potassium and 315 mg phosphorus. So barley is not worse than your daily roti. But it is not a special kidney food either.

NIDDK tells people with chronic kidney disease to avoid foods high in sodium, potassium and phosphorus. Damaged kidneys clear both poorly. Potassium can climb high enough to cause heart and muscle problems. Phosphorus can weaken bones and cause itching.

A second catch gets missed. NIDDK says people with CKD may also need to limit how much liquid they drink. Damaged kidneys cannot remove the extra. And a litre of anything is a litre.

Have chronic kidney disease? Ask your kidney doctor or renal dietitian first. That goes for barley water and for jau atta. How much you can have depends on your own blood results. A general rule is not safe here.

Is jau atta good for kidney patients?

Jau atta is not a kidney cure, and it is not off-limits for everyone. Jau atta is barley flour, so it keeps the minerals of the grain. IFCT 2017 tests barley grain, not jau atta itself. By those numbers, barley has a little less potassium and phosphorus than wheat atta. How much you can eat depends on your own blood results. A renal dietitian can tell you how many rotis fit your limit.

Does barley water reduce creatinine?

There is no proof that it does in kidney disease. We searched PubMed on 29 October 2026. We found no trial of barley water in people with kidney disease. One 2022 trial in Iran gave 250 ml of Persian barley water a day to hospital patients with COVID-19 for two weeks. Their creatinine dropped more than in the group without it (Tavakoli et al., 2022). That trial was about COVID-19, not kidney disease. If your creatinine is high, see a kidney doctor. Do not treat it with a home drink.

Weighing up grains with kidney health in mind? Our jowar benefits guide asks the same questions of sorghum.

How to Make Barley Water

Short answer: rinse 50 g of pearl barley. Boil it in a litre of water. Simmer 25 to 30 minutes, then strain. Keep the grains. Cool the liquid before you flavour it.

It takes about 35 minutes, and almost all of that is unattended simmering.

1. Rinse. Rinse 50 g of pearl barley, about a quarter cup, under running water. Pick out any grit.
2. Boil. Bring 1 litre of water to a rolling boil, then tip the barley in.
3. Simmer. Drop the heat low and let it go 25 to 30 minutes. The grains should turn soft and the water slightly cloudy.
4. Strain. Pour it through a fine mesh strainer into a jug. Keep the grains.
5. Cool. Let it reach room temperature. Do not put a hot jug straight into the fridge.
6. Flavour and chill. Add lemon juice, a little honey or a few mint leaves. Chill it and finish it within 24 hours.

Barley grain is easy to find. Not in your local kirana? Pearl barley and jau are sold on Amazon across India.

Why you cannot make it in an infuser bottle

This is the most common mistake, so let us be plain. Barley grains are hard and dry. Steeping them in cool water does nothing. It does not matter how long you leave them.

Mint, cucumber and lemon give up flavour cold. Barley needs real sustained heat. So boil first, strain, then cool. Only then use an infuser bottle for the finished drink. Our pudina pani guide covers the drinks that do steep cold.

Do not throw the grains away

Those strained grains hold most of the fibre you paid for. They are soft and mild. They go into almost anything.

• Stir them into dal or khichdi in the last five minutes.
• Add them to a vegetable soup instead of noodles.
• Mix them into a pulao in place of some of the rice.
• Cool them and toss them through a salad with lemon and salt.

A half-hour simmer is a job a counter-top pot does better than a gas burner. We wrote about that in why a non-stick multicook kettle suits a small kitchen.

Side Effects and Who Should Be Careful

Short answer: barley contains gluten. It is filling. And it carries potassium and phosphorus. Those three facts cover nearly everyone who should be careful.

• Coeliac disease or gluten sensitivity. Barley contains gluten. Avoid it.
• Chronic kidney disease. See the section above, and ask your doctor first.
• On any regular medicine. A large volume of any fluid can change how you take tablets. Ask your pharmacist.
• Pregnancy. Barley water as a drink is food, not medicine, but check with your doctor before making it a daily habit.
• Sweetened versions. Shop-bought barley drinks can carry a lot of sugar. Read the label.
• Too much at once. Extra fibre and extra fluid together can leave you bloated. Start with one glass.

Like this style of drink? Our jeera water guide runs the same check on cumin water.

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Questions People Ask

Sources & References

1. Indian Food Composition Tables 2017 — ICMR-National Institute of Nutrition. Food code A004, Hordeum vulgare: protein, total/soluble/insoluble fibre, energy, potassium and phosphorus (Table 5, with wheat atta A019 for comparison), and the regional-name index.
2. USDA FoodData Central 170283 — Barley, hulled.
3. USDA FoodData Central 170284 — Barley, pearled, raw.
4. USDA FoodData Central 170285 — Barley, pearled, cooked.
5. 21 CFR 101.81 — US FDA health claim, soluble fibre from certain foods and risk of coronary heart disease. The 3 g/day beta-glucan level and the barley eligibility criteria.
6. Federal Register, 22 May 2006 — the FDA rule adding barley to that claim.
7. NIDDK — Eating, Diet & Nutrition for Kidney Stones.
8. National Kidney Foundation — Kidney Stones.
9. NIDDK — Eating, Diet & Nutrition for Bladder Infection in Adults.
10. NIDDK — Treatment for Bladder Infection in Adults.
11. NIDDK — Healthy Eating for Adults with Chronic Kidney Disease.
12. Barley-Water a Powerful Diuretic. The American Journal of Dental Science, December 1845. PMID 30750699.
13. Borghi L, Meschi T, Amato F, Briganti A, Novarini A, Giannini A. Urinary volume, water and recurrences in idiopathic calcium nephrolithiasis: a 5-year randomized prospective study. J Urol. 1996 Mar;155(3):839-43. PMID 8583588.
14. Glycemic Index Research and GI News — Barley. University of Sydney. Barley GI 30.
15. Nazari V, Keshavarzian O, Pasalar M, et al. Evaluating the Efficacy of Barley Water in Alleviating Radiotherapy-Induced Dysuria in Prostate Cancer Patients: A Randomized Placebo-Controlled Trial. Prostate. 2025 Oct;85(14):1272-1281. PMID 40698513.
16. Tavakoli A, Molavi Vardanjani H, Namjouyan F, Cramer H, Pasalar M. Efficacy of Persian barley water on clinical outcomes of hospitalized moderate-severity COVID-19 patients. Eur Rev Med Pharmacol Sci. 2022 Feb;26(3):1033-1041. PMID 35179770.

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