What percentage of the human body is composed of water?...

In general, our bodies are made up of about 2/3 water (about 60%). But, in actuality, different people have different percentages of their bodies made up of water.

“Babies have the most, being born at about 78% water. By one year of age, that amount drops to about 65%.”

In adult men, about 60% of their bodies are water. However, fat tissue does not hold as much water as lean tissue (and men have more lean tissue than women). Thus, since fat makes up more of the female body, their bodies are made up of less water, or about 55%. Fat men also have less water (percentage) than thin men.

“In general, the higher the percentage fat tissue an individual has, the lower the percentage total water content in the body.”

Rule of thumb for discrepancies in percentage water in the human body:
1) Babies and kids have a higher percentage body water than adults.
2) Women have a lower percentage body water than men (due to having more fat tissue).
3) The more fat tissue someone has, the less percentage body water and vice versa.