Water constitutes what average normal percentage of total body weight?

The average normal percentage of total body weight that water constitutes is around 50-70%. This range is based on the fact that water is an essential component of the human body, making up a significant portion of its mass. In adults, it is generally estimated that about 60% of total body weight is water, although this can vary depending on factors such as age, sex, and body composition.

For instance, infants have a higher percentage of body water, ranging from approximately 70-80%, while the percentage tends to decrease with age, especially after childhood. Additionally, individuals with a higher proportion of muscle mass may have a greater percentage of body water since muscle tissue contains more water than fat tissue. Thus, understanding this percentage is crucial in various fields, including medicine and health, as it helps in assessing hydration levels, fluid balance, and overall health status.