What percentage of the human body is made up of water?

The human body is composed of approximately 60% water, which is vital for numerous bodily functions. This percentage can vary slightly based on factors such as age, sex, and body composition. For example, infants have a higher water composition, around 75%, while the percentage in older adults can decrease to about 50%.

Water plays crucial roles, including maintaining body temperature, aiding digestion, and facilitating biochemical reactions. The body's need for hydration to support these functions underscores the importance of water intake for overall health. Understanding that roughly 60% of the body is water emphasizes its fundamental role in bodily systems and the need for regular fluid consumption.