Drinking Barley Water on an Empty Stomach

DetoxWater Editorial Team•Published November 2, 2026

Yes, most people who tolerate barley can drink barley water on an empty stomach because its water helps hydrate the body, though fasting offers no proven advantage. Plain barley water can be part of your usual fluid intake, whether you drink it before breakfast or with a meal. Start with a small amount if you are unsure how your stomach will respond.

Is barley water good to drink on an empty stomach?

Barley water is a reasonable morning drink for someone who enjoys it and can tolerate barley. It supplies fluid, but there is no good evidence that drinking it before eating produces special benefits compared with drinking it at another time.

The available research is about barley as a food, not barley water consumed while fasting. In a small randomized trial of cereal-based evening meals, healthy volunteers had a lower blood glucose response to a standardized breakfast after eating barley kernels the previous evening than after some of the comparison meals. The study did not test a barley drink or show that taking it on an empty stomach improves blood glucose.

Choose a time that fits your routine. If barley water makes you feel uncomfortable before breakfast, try it with food instead, or choose plain water. There is no required waiting period between drinking it and eating.

What are the benefits of drinking barley water in the morning?

The clearest benefit is hydration. If you like the taste of barley water, having it in the morning may make it easier to drink fluid as part of your normal routine. You do not need to be fasting for that benefit.

Barley itself contains soluble fiber, including beta-glucan. Some material from the grain can pass into the cooking water, but the amount in a homemade drink varies with the preparation. Straining out the grains means you should not assume the drink contains the same amount of fiber as a serving of cooked barley.

Barley water is also not a substitute for breakfast. If you need a meal, pair it with foods that provide the nourishment you need rather than relying on the strained liquid to keep you full. Avoid adding sugar if you prefer an unsweetened drink; added sweeteners change its nutritional content.

There is no evidence that drinking barley water before food gives your body a special detox. The liver and kidneys do most of the body's detoxification, while the lungs and gut help eliminate waste and sweat removes only trace amounts. Drinking enough fluid supports normal body function, but barley water does not flush toxins out of the body.

Who should avoid barley water or be careful?

Avoid barley water if you have celiac disease or a barley allergy. Barley contains gluten, and straining the grains does not make the liquid a safe gluten-free drink. If you avoid gluten for another medical reason, ask your clinician whether it is appropriate for you.

If you have diabetes, consider that homemade barley water may contain carbohydrate from the grain, especially if it is sweetened or served with the grains. Ask your clinician or dietitian how it fits your eating plan, particularly if you use insulin or other glucose-lowering medicines. Do not use barley water in place of prescribed treatment.

If you have a digestive condition or tend to experience bloating, introduce it cautiously and stop if it causes discomfort. People who have been told to limit fluids because of a medical condition should check with their care team before adding it routinely.

Seek medical advice for persistent or concerning digestive symptoms. Get emergency help if you develop trouble breathing or swelling of the tongue or throat after consuming barley.

How should you drink barley water on an empty stomach?

There is no established effective dose or best time. For a first try, a small serving such as 1/2 cup (120 mL) is a practical starting point, not a medically proven dose. Drink it before breakfast if you enjoy it, and have it with food instead if your stomach feels better that way.

To make a simple, unsweetened batch, you will need:

  • 1/4 cup (about 45 g) dry pearl barley
  • 4 cups (about 950 mL) water
  1. Rinse the barley under running water.
  2. Combine the barley and water in a saucepan and bring to a boil.
  3. Cover and simmer for about 30–40 minutes, or follow the package directions, until the barley is tender. Add drinking water if needed to keep the barley covered.
  4. Strain the liquid into a clean container. Save the cooked barley for food if you like.
  5. Cool the barley water promptly and refrigerate it within 2 hours of cooking. Drink it within 24 hours for best flavor, and discard it sooner if it becomes cloudy, slimy or sour-smelling.

For other drink ideas, try the ai infused water generator; prepare barley water by cooking the grain as described above.

Serve the barley water warm after cooking or cold from the refrigerator. Keep the batch refrigerated rather than leaving it out during the day, and make a fresh batch when needed.

Frequently asked questions

Does barley water have to be warm in the morning?

No. You can drink it warm or refrigerated; there is no evidence that one temperature gives it a special fasting benefit.

Can I use hulled barley instead of pearl barley?

Yes. Hulled barley can take longer to cook, so follow the package directions and simmer it until tender before straining.

Can I eat the barley left after making barley water?

Yes, if you tolerate barley. Refrigerate the cooked grains promptly and use them as food rather than assuming their fiber is all in the strained drink.

Sources

  1. Effects of GI and content of indigestible carbohydrates of cereal-based evening meals on glucose tolerance at a subsequent standardised breakfast. European journal of clinical nutrition (2006). PubMed 16523203