How Much Water Do We Need?

Written by: Sitara Nair

Did you know that the human body is approximately 60% water? We need water to survive, and some people like to say that drinking eight glasses a day is the golden rule, but why? Why eight glasses, and why do we really need that much water? Let’s learn together!

Why Water Is Important

Water is crucial for our lives, as it regulates temperature, reduces waste, hydrates tissues, and even lubricates joints. There are multiple key physiological functions of water, one of which is thermoregulation. Thermoregulation refers to how water helps manage body temperature through sweat, preventing overheating during exercise or in hot weather. Also, water is essential for nutrient and oxygen transport. Water makes sure oxygen rich blood and essential nutrients actually reach our cells, crucial for healthy living! Additionally, water is neccessary for waste removal, specifically for the kidneys to function (the organ that filters waste), and it aids in regular bowel movements. Water also aids in our body through joint lubrication and cushioning. It keeps joints lubricated and protects tissues and organs. Another reason water is a necessity is that it aids in brain function. Hydration supports cognitive functions, including memory and clear thinking.

The “8 Glasses a Day” Rule 

The saying I mentioned before, the “8 Glasses a Day” rule has been around for many years. Many people believe everyone should drink eight 8-ounce glasses of water daily, which equals about 64 ounces. However, this rule is more of a general guideline than a strict scientific requirement. However, this rule is more of a general guideline. It is not a strict law. It became popular because it is simple and easy to remember. Eight glasses sounds clear and manageable. The truth is that not everyone needs the same amount of water because our bodies are different. A child does not need the same amount as an adult and an athlete does not need the same amount as someone who sits most of the day. Climate also matters; people who live in hot areas usually need more water. People who exercise a lot need more water. When you sweat, you lose fluids, and those fluids need to be replaced. It is also important to remember that we get water from food. Fruits and vegetables contain a lot of water. Drinks like milk and juice also count toward daily fluid intake.

How Much Water People Actually Need

So how much water do people actually need? There is no single number that works for everyone. A better idea is to listen to your body.Thirst is an important signal. If you feel thirsty, your body needs fluids. Urine color is another sign. Light yellow usually means you are hydrated. Dark yellow can mean you need more water. Some general guidelines say women should aim for about 11 cups of total fluids per day. Men should aim for about 15 cups, including fluids from food and drinks. These numbers are only recommendations though it can’t speak on behalf of everyone. They are not exact rules.Additionally certain situations increase water needs. Athletes need more fluids. Pregnant and breastfeeding women need more fluids. People who are sick also need more water. A fever, vomiting, or diarrhea causes the body to lose fluids quickly. Also, it is possible to drink too much water but this is rare. It usually happens during extreme physical events. For most people, drinking when thirsty is enough.