Studies have shown that the human body contains 60 to 70 percent of its body weight in water. The water content of a person’s body varies at different ages. A person from being conceived, the fetal period, the body of water accounted for 90% of body weight; croaked baby, the body of water accounted for 80% of body weight. During adolescence, body water is differentiated by gender, with males having 75% of their body weight in water and females having 70% of their body weight in water; In adulthood, men have 70% of their body weight in water and women have 65% of their body weight in water; in old age, men have 65% of their body weight in water and women have 55% of their body weight in water. Everyone’s water content is also slightly different, and an individual’s water content needs to be measured in a professional way.