Milady Cosmetology Practice Exam

Water composes what percentage of the body’s weight?

1. 40 to 50%

2. 50 to 60%

3. 50 to 70%

4. 60 to 70%

The correct answer is: 50 to 70%

Water makes up about 50 to 70% of the human body's weight, with estimates typically hovering around 60% for an adult. This significant proportion is due to water's critical role in various physiological functions, including regulating body temperature, transporting nutrients, and facilitating cellular processes. It is essential for maintaining homeostasis and overall health. While other ranges might seem plausible, they generally represent less accurate estimates in comparison to the established understanding of hydration levels in the body. For example, options that propose percentages below this range don't reflect the substantial role that water plays in human physiology. Understanding these percentages is crucial for those in the cosmetology field, as hydration is vital for skin health and overall appearance.