How much water should we drink a day?

For years it has been repeated that you have to drink two liters of water a daybut is it really that simple? Science has been investigating this issue for some time and, although There is no magic number valid for everyone.Yes, there are clear guidelines that help know if we are hydrating well.

There is no exact figure: it varies according to many factors

According to the United States National Institutes of Health (NIH), The ideal amount depends on many factorsbut, as a general reference, the men should consume some 3.7 liters dailyand women 2.7 liters. It’s not just about pure water: Infusions, broths and foods rich in water, such as fruits, also count.vegetables or soups. In fact, close to 20% of the water we drink comes from food.

The body does not need the same things in summer as in winter.nor should a sedentary person drink the same amount as someone who plays sports or works outdoors. Age, body weight, climate, type of exercise or even certain medications can modify our needs a lot. On hot days or during sports practiceFor example, the body loses more fluid through sweat, so it is advisable to drink more and also replace mineral salts that are removed.

Even water can be bad in excess

The simplest way to check that we are well hydrated does not require formulas: just observe the color of urine. If it is clear or pale yelloweverything is fine. If it is darker, it is a sign of dehydration. Another indicator is the how often you go to the bathroom: experts calculate that the ideal is to eliminate some 2.5 liters of urine per daya figure that reflects correct fluid intake.

Although it is not frequent, excess water can also be dangerous. If ingested in excess, especially during prolonged exercise or without replenishing electrolytes, it can cause hyponatremiaa alteration in the concentration of sodium in the blood which can have serious consequences. Therefore, when physical effort is intense or you sweat a lot, it is recommended accompany water with drinks containing mineral salts or a little sodium.

The people with kidney or heart disease They must be especially careful with the amount of liquid they consume. In your case, too much can cause retention, swelling or even difficulty breathing. Therefore, it is always advisable to follow the doctor’s instructions if there is any underlying pathology.

How to hydrate correctly daily

Experts from specialized organizations such as the WHO or the NIH recommend some basic tips for good hydration:

• Take advantage of foods rich in water: Fruits such as watermelon, orange or melon, and vegetables such as cucumber, tomato or zucchini, are excellent allies.

• Increase consumption if you do sports: before, during and after exercise. If the activity lasts more than an hour, opt for isotonic drinks.

• Adapt the intake to the circumstances: In summer, in dry environments or with fever, the body needs more fluids.

• Avoid confusing soda with hydration: Water, mild infusions and broths are the best options. Sugary or alcoholic drinks can make you more dehydrated.

There is no universal number, but there is a general key: hydrate regularly, listen to your body and adapt the amount of water to daily needs. Drinking wisely, neither less nor more, is one of the simplest and most effective decisions to take care of your health.