Body Trivia : What percentage of the brain is water?

What percentage of the average human brain is water?

 75 ~ 80%.

When we drink water before study, memory and concentration improve. 
When water even falls in 40%-50%, we die.


As a component of a body, 
water    : 60 - 70%, 
Protein : 15 - 20%, 
Fat         : 13 - 20%, 
Mineral : 5 - 6%, 
Glucide : 1%.