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Everyday health · 2 min
How Water Helps Your Body Work
Reviewed by Velantri physicians on October 26, 2026
Water plays a key role in keeping the body running smoothly every day. The body uses water to maintain a normal temperature when the weather changes or during activity. Water also helps the body remove waste through urine and other processes. These jobs happen around the clock, so the body relies on a steady supply of fluid. Plain water is one important source, but it is not the only one. Many foods contain water that counts toward daily fluid needs. Fruits like watermelon and oranges have a lot of water. Vegetables such as cucumbers and lettuce also add fluid. Soups and broths provide water along with flavor. Other drinks contribute too, including milk, tea, and coffee. All of these sources work together to meet the body's need for fluid throughout the day. Fluid needs are not the same for everyone. Age makes a difference because children and older adults may need different amounts. Physical activity increases the body's use of water, so people who exercise or work outdoors may need more fluid. Pregnancy and breastfeeding also change fluid needs. A person who is pregnant or nursing provides fluid for the baby as well as for their own body. These situations call for extra attention to drinking enough throughout the day. Many people enjoy drinks that contain added sugar. Soda, sweetened tea, and fruit punch often have a lot of calories from sugar. Choosing plain water instead of a sugary drink reduces the calories from that drink. This simple swap can make a difference over time. Water provides fluid without any added sugar or calories. It is available almost everywhere and costs very little or nothing from a tap. Some people like the taste of plain water, while others prefer adding a slice of lemon or cucumber for flavor. Paying attention to drink choices can help anyone understand their own habits. Noticing when a sugary drink is chosen out of habit rather than preference is a first step. Some people find that keeping a reusable water bottle nearby makes plain water easier to reach. Others discover that certain times of day are good moments to choose water. Each person can find a pattern that fits their routine and preferences.
Try this
Notice one drink you choose today and think about whether plain water might work just as well in that moment.
Quick check
What are two jobs that water does in the body?
Answer: It maintains normal temperature and helps remove waste. — Water supports normal temperature regulation and helps the body remove waste. These are key roles that water plays every day.
Which of these can add to daily fluid intake?
Answer: Foods and other drinks contribute along with plain water. — Foods and other drinks contribute to total fluid intake. Many fruits, vegetables, soups, and beverages provide water to the body.
What happens when someone replaces a sugary drink with plain water?
Answer: Calories from that drink are reduced. — Replacing a sugary drink with plain water reduces the calories from that drink. This swap provides fluid without added sugar.
Sources
This article is general health education reviewed by physicians. It is not medical advice for your situation. Talk to your clinician before changing medication or treatment, and seek urgent care for symptoms that worry you.