Educational information, not medical advice — ask your doctor or midwife.
Arroz is rice, the grain of the grass Oryza sativa. It is a staple food in almost every Latin American kitchen. It is also a long-standing home remedy for an upset stomach.
Most home remedy use takes one of two shapes. People drink agua de arroz, the starchy water left from cooking or soaking rice. They also eat plain white rice as a bland food while the gut settles.
Here is the honest verdict. Starch-based rehydration drinks (salt and sugar drinks that replace lost fluid) have real trial support in watery diarrhoea. Other home uses rest on custom, and long tradition is proof of neither effect nor safety.
Rice starch is the part that matters. In the gut, starch breaks down slowly into glucose (a simple sugar). Glucose helps the gut pull salt and water back into the body.
That is the basis of rice-based rehydration drinks. Human trials, mostly in cholera, show they cut the amount of stool passed. The starch releases sugar slowly, so less water is drawn into the bowel.
Plain rice is also just bland and easy to eat. That may be most of its comfort value during a stomach bug. It does not stop an infection.
Other claims are less settled. Rice water holds starch, small amounts of plant acids and some minerals. In lab and small skin studies it may soothe skin, but good human trials are thin.
Rice is sold as food, not as a pill, so the forms are kitchen forms.
- White rice: the common table grain, lower in fibre and minerals. - Brown rice: the whole grain, with bran and more fibre. - Agua de arroz: the starchy water from cooking or soaking rice.
- Horchata de arroz: a sweet rice and cinnamon drink. - Atole de arroz: a warm, thick rice drink. - Rice flour: used in baking, gluten-free cooking and skin pastes.
- Rice milk: a plain drink, often fortified with calcium. - Rice bran oil: a cooking oil, also used in skin products. - Rice-based oral rehydration sachets: a medical product, sold in pharmacies.
Rice reached the Americas on Iberian ships in the 1500s. Spanish, Portuguese, African and later Asian cooks all shaped how it was grown and eaten. Within a few centuries arroz was a daily food from Mexico to Argentina.
In home care, grandmothers gave agua de arroz to children with loose stools. Plain rice was the first food offered after vomiting. Atole de arroz was given to new mothers, who were told it helped their milk.
Rice flour pastes were put on heat rash and itchy skin. Bags of dry rice were warmed and held against cramps or sore ears. These were household customs, passed down by family rather than tested, and this page does not advise self-treatment on that basis.
When to see a doctor. Stop home care and get medical help if any of these happen.
- Signs of dehydration: little or no urine, sunken eyes, no tears in a child, drowsiness or confusion. - Blood or black colour in the stool. - A high fever with the diarrhoea. - Vomiting that stops you keeping fluids down. - Diarrhoea lasting more than two days in an adult, or more than a day in a baby or frail older person. - Hard vomiting a few hours after eating reheated rice. - Rash, swelling of the lips or face, or wheeze after a rice meal. This needs urgent care.
Rice is an ordinary food everywhere and needs no licence. The European Union sets legal limits on inorganic arsenic in rice, with tighter limits for baby food, and the United States FDA sets guidance levels for infant rice cereal.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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