Can rehydrate with fruit, milk, coffee?

According to scientists, water can come from many foods such as fruit, milk, and coffee, not just filtered or mineral water.

In the summer, in high temperatures, staying hydrated becomes more important than ever. Experts say that if you don’t drink enough fluids on hot days, the body is more susceptible to heat stroke, heatstroke, and cramps.

Many people believe that it is necessary to drink 8 glasses of water a day. However, experts say the body’s water supply comes from more places than filtered or mineral water.

“Dark urine doesn’t mean you’re dehydrated. Drinking enough water is simply consuming enough fluids and not feeling thirsty. The right amount of water is different for each person,” said Dr. Dan Negoianu , a nephrologist at the University of Pennsylvania, said.

All foods, fruits, and beverages with liquid ingredients provide water. The body doesn’t care where that water comes from. It will absorb and process the same way, explains Dr. Negoianu.

Fruits and vegetables are ideal sources, as they are both high in water content and contain fiber, which is beneficial for any diet. Melons, such as watermelon, cantaloupe, citrus fruits or grapes, cucumbers, and celery also contain a lot of water.

All beverages such as milkshakes, tea and coffee provide water for the body. Drinks with a high sugar content are often not the most nutritionally ideal choice. However, research shows that sugary drinks also provide the same amount of fluid as mineral water.

Some people think salty foods cause dehydration. However, according to Dr. Kelly Hyndman, a researcher at the University of Alabama, Birmingham, that is not necessarily true.

Fruits such as watermelon, strawberry, cucumber can provide water for the body. Image: NY Times

He said the human body is constantly looking for ways to maintain the balance between salt and water. This process is aided by several hormones, one of which is antidiuretic hormone, or ADH.

When people consume large amounts of salty foods at once, the brain secretes a lot of ADH, which stimulates the kidneys to perform the function of filtering water, preventing excess fluid from urination. At the same time, the brain also secretes another hormone, vasopressin, which causes thirst. Together, they signal the body to need more fluids.

Dr Tamara Hew-Butler, an expert in sports medicine at Wayne State University, said: “Eating too much salt is only harmful if you ignore the body’s signs of thirst.” Salty foods that can add water are olives and pickles, although few people consume them in large amounts.

According to Dr. Hyndman, many people misunderstand the state of dehydration of the body. Most people provide enough fluids throughout the day, whether or not they pay attention to drinking water. People who need to drink more water are children, the elderly, and people with underlying medical conditions.

The body’s need is sometimes just to drink a glass of water or eat liquid foods when thirsty. “Trust our instincts, we don’t need to think too much about drinking water,” she said.

“I think that drinking water when thirsty is an irrefutable principle. Everyone has their own threshold to drink water,” Dr. Negoianu said.

Thuc Linh (Follow NY Times)


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