Thanks for the great question! As you may
have already heard, the human body is made up of
60% water! I found an interesting website click here to see that further states
that blood is 92% water, the human brain and
muscles are 75% water, and even bones are 22%
Of the water that makes up your body, all of
this water contains lots of salt ions, which are
more commonly called electrolytes (but the water
in our body is not nearly as salty as the
ocean!). In fact, these electrolytes are so
important for the human body that we need to
replenish these salt ions when we lose them, for
example by sweating. This is why athletes drink
Gatoraid or Poweraid during intense workouts;
athletes need to replenish the electrolytes as
well as the water!
Since tears are made up of the water that
comes out of your body, this is one reason that
they are salty. Another reason that tears are
salty is because salt ions are also very
important for the proper function of your eyes.
Tears not only contain salt ions, but also other
materials that are important for proper eye
function, including proteins that lubricate your
eyes (proteins are molecules that are made by
your body to perform many different functions).
Here is a short website with a few facts about
I hope that this answers your question, and
keep the questions coming!