Here's How Much Water You Should Drink Every Day

March 22 marks World Water Day. The day is celebrated across the world in order to understand the importance of water in our lives. Drink lots of water in a day - this is a line we have heard so many times! Dietitians, nutritionists and several health experts have considered drinking water as the key to good health and well-being. Anywhere around 8 to 10 glasses of water is recommended by experts as it helps in maintaining our hydration levels and releases harmful toxins from the body.

The human body constantly loses water from the body in the form of sweating and urinating. And while 8 to 10 glasses of water are widely recommended by experts, individual health and needs may vary significantly from person to person.

"Water forms the basis of life. 70% of human body comprises water. It performs some essential functions like maintaining electrolyte balance, regulating body temperature, aiding digestion, absorption, excretion, preventing constipation and aiding in weight loss," says city-based nutritionist Pooja Malhotra.

"Insufficient intake of water," she adds, "can cause dryness of the mouth, headache, dry skin, dizziness, a drop in energy, alertness and concentration."

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So this World Water Day, let's take a look at how much water is needed for proper functioning of the body and brain.

How much water should you drink in a day?

As mentioned above, water intake can vary from individual to individual. For some people, drinking lots of water helps in terms of hydration and feeling energetic, but other might only be met with the inconvenience going to the bathroom again and again. So, a few bottom lines apply for drinking sufficient water in a day.

These bottom lines include drinking water every time you're thirsty and stop drinking it when you're not thirsty. On extremely hot weathers and rigorous exercising, drink water to compensate for lost fluids.

Agrees Monisha, who says, "In this weather, whatever water you're losing in the form of sweating should be replenished by drinking water."

On an average, Monisha says that an adult should drink about 3 litres of water. "Men usually need more water because of their muscle build-up. 3 litres of water is good for men and 2.5-3 litres water is essential for women."

Also read: Real Weight Vs Water Weight: How To Differentiate

Does drinking water contribute to elevated energy and improved brain function?

It is often claimed that drinking water is important to maintain hydration for feeling energetic and keeping the brain functioning properly.

1% of body weight is water weight. So when we exercise and swear too much, it can affect or physical performance and reduce endurance.

Can drinking water help in losing weight?

Drinking water is known to boost metabolism and reduce appetite significantly. Drinking 500 ml of water can boost metabolism somewhere around 30%. If you drink water half an hour before meals, it can help in reducing the amount of calories you eat in that meal. When combined with a healthy or clean eating diet, drinking water can contribute to weight loss.

According to clinical nutritionist Monisha Ashokan, every time we drink water, we are giving a boost to your metabolism. "Boosting metabolism increases the capacity of your body to burn calories," she explains.

Also read: When Is The Best Time To Give Water To Your Newborn

Water helps in preventing health problems

Health problems such as constipation, kidney stones and acne can all be dealt with by drinking water. Drinking water reduces incidence of kidney stones and constipation. It can also help in keeping the skin well hydrated and reduce acne.

"Water plays a huge role in your bowel movement. The biggest remedy for constipation is drinking lots of water," says Monisha.

"Many people consult me about constipation and how their condition is not treated despite eating healthy and fibrous foods. But without water, there is not source of converting your food into smaller particles and passing them out of the body easily," she explains.

Water also benefits the skin. "There are many toxins and harmful radicals in the body. The more water you drink, the more toxins you will be flushing out during urination. Toxins play a huge role in putting on weight as they latch on to fat cells in the body," Monisha tells DoctorNDTV.

Other sources of water

There are some food sources which have high water content. These foods include eggs, fish, meat and water-rich fruits and veggies like cucumber, lettuce, etc. Having foods rich in water can help in maintain the required fluid balance in your body.

It is always important to drink water when you feel thirsty, to maintain the water balance in your body. Drink enough water on times you're thirsty, sweating excessively, when you're exercising and on days when the weather is hot and dry. Pregnant women need enough for water sufficient breastfeeding and keeping diseases like vomiting and diarrhoea at bay.

(Monisha Ashokan is a clinical nutritionist)
(Pooja Malhotra is a city-based nutritionist)

Disclaimer: This content including advice provides generic information only. It is in no way a substitute for qualified medical opinion. Always consult a specialist or your own doctor for more information. NDTV does not claim responsibility for this information.